/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:59:49,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:59:49,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:59:49,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 19:59:49,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 19:59:49,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 19:59:49,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 19:59:49,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 19:59:49,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 19:59:49,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 19:59:49,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 19:59:49,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 19:59:49,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 19:59:49,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 19:59:49,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 19:59:49,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 19:59:49,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 19:59:49,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 19:59:49,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 19:59:49,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 19:59:49,208 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 19:59:49,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 19:59:49,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 19:59:49,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 19:59:49,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 19:59:49,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 19:59:49,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 19:59:49,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 19:59:49,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 19:59:49,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 19:59:49,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 19:59:49,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 19:59:49,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 19:59:49,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 19:59:49,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 19:59:49,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 19:59:49,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 19:59:49,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 19:59:49,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 19:59:49,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:59:49,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:59:49,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:59:49,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:59:49,233 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:59:49,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:59:49,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:59:49,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:59:49,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:59:49,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:59:49,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:59:49,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:59:49,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:59:49,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:59:49,242 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:59:49,242 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:59:49,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:59:49,242 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:59:49,243 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:59:49,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:59:49,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:59:49,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:59:49,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:59:49,432 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:59:49,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2022-04-06 19:59:49,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06a946400/101b0d80e22e4491b7a2323e9c1ab521/FLAG584430973 [2022-04-06 19:59:49,863 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:59:49,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i [2022-04-06 19:59:49,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06a946400/101b0d80e22e4491b7a2323e9c1ab521/FLAG584430973 [2022-04-06 19:59:49,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06a946400/101b0d80e22e4491b7a2323e9c1ab521 [2022-04-06 19:59:49,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:59:49,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:59:49,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:59:49,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:59:49,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:59:49,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:59:49" (1/1) ... [2022-04-06 19:59:49,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9d2eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:49, skipping insertion in model container [2022-04-06 19:59:49,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:59:49" (1/1) ... [2022-04-06 19:59:49,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:59:49,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:59:50,087 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i[893,906] [2022-04-06 19:59:50,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:59:50,111 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:59:50,121 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i[893,906] [2022-04-06 19:59:50,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:59:50,142 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:59:50,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50 WrapperNode [2022-04-06 19:59:50,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:59:50,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:59:50,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:59:50,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:59:50,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:59:50,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:59:50,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:59:50,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:59:50,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (1/1) ... [2022-04-06 19:59:50,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:59:50,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:50,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:59:50,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:59:50,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:59:50,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:59:50,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:59:50,233 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 19:59:50,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:59:50,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:59:50,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:59:50,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:59:50,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:59:50,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:59:50,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:59:50,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:59:50,236 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 19:59:50,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:59:50,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 19:59:50,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:59:50,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:59:50,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:59:50,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:59:50,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:59:50,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:59:50,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:59:50,283 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:59:50,284 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:59:50,391 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:59:50,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:59:50,395 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 19:59:50,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:59:50 BoogieIcfgContainer [2022-04-06 19:59:50,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:59:50,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:59:50,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:59:50,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:59:50,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:59:49" (1/3) ... [2022-04-06 19:59:50,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9bc2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:59:50, skipping insertion in model container [2022-04-06 19:59:50,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:59:50" (2/3) ... [2022-04-06 19:59:50,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9bc2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:59:50, skipping insertion in model container [2022-04-06 19:59:50,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:59:50" (3/3) ... [2022-04-06 19:59:50,403 INFO L111 eAbstractionObserver]: Analyzing ICFG large_const.i [2022-04-06 19:59:50,406 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:59:50,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:59:50,448 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:59:50,455 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 19:59:50,455 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:59:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) [2022-04-06 19:59:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 19:59:50,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:50,474 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:50,474 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash -829760349, now seen corresponding path program 1 times [2022-04-06 19:59:50,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:50,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025441511] [2022-04-06 19:59:50,495 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:59:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash -829760349, now seen corresponding path program 2 times [2022-04-06 19:59:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:50,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78845077] [2022-04-06 19:59:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:50,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:50,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78845077] [2022-04-06 19:59:50,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78845077] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:50,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:50,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:59:50,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025441511] [2022-04-06 19:59:50,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025441511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:50,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:50,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:59:50,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176871569] [2022-04-06 19:59:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:50,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:59:50,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:59:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 19:59:50,729 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-04-06 19:59:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:50,829 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-06 19:59:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:59:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-04-06 19:59:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:50,835 INFO L225 Difference]: With dead ends: 47 [2022-04-06 19:59:50,835 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 19:59:50,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:59:50,839 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:50,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:59:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 19:59:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 19:59:50,859 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) [2022-04-06 19:59:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-06 19:59:50,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-04-06 19:59:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:50,861 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-06 19:59:50,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-04-06 19:59:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-06 19:59:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:59:50,862 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:50,862 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:50,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:59:50,863 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash -174022606, now seen corresponding path program 1 times [2022-04-06 19:59:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900517381] [2022-04-06 19:59:50,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:50,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -174022606, now seen corresponding path program 2 times [2022-04-06 19:59:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:50,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042531777] [2022-04-06 19:59:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:50,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:51,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:51,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042531777] [2022-04-06 19:59:51,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042531777] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:51,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559225755] [2022-04-06 19:59:51,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:59:51,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:51,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:59:51,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:59:51,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:59:51,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:51,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:59:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:51,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:51,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559225755] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:51,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:51,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:59:51,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:51,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900517381] [2022-04-06 19:59:51,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900517381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:51,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:51,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:59:51,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819032226] [2022-04-06 19:59:51,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:51,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:59:51,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:59:51,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:59:51,288 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-04-06 19:59:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:51,417 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-04-06 19:59:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:59:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2022-04-06 19:59:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:51,420 INFO L225 Difference]: With dead ends: 39 [2022-04-06 19:59:51,421 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 19:59:51,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:59:51,422 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:51,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 42 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:59:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 19:59:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-04-06 19:59:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-04-06 19:59:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-06 19:59:51,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-04-06 19:59:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:51,439 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-06 19:59:51,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-04-06 19:59:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-06 19:59:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 19:59:51,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:51,440 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:51,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 19:59:51,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:51,657 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash 767622940, now seen corresponding path program 1 times [2022-04-06 19:59:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486188625] [2022-04-06 19:59:51,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:51,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash 767622940, now seen corresponding path program 2 times [2022-04-06 19:59:51,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:51,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334662217] [2022-04-06 19:59:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:51,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:51,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:51,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334662217] [2022-04-06 19:59:51,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334662217] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531428013] [2022-04-06 19:59:51,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:59:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:51,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:59:51,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:59:51,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:59:51,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:59:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:51,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:51,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531428013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:51,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:51,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:59:51,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:51,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486188625] [2022-04-06 19:59:51,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486188625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:51,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:51,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:59:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115542139] [2022-04-06 19:59:51,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:51,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:59:51,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:59:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:59:51,930 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 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) [2022-04-06 19:59:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:52,054 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-04-06 19:59:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:59:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 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 18 [2022-04-06 19:59:52,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:52,056 INFO L225 Difference]: With dead ends: 49 [2022-04-06 19:59:52,056 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 19:59:52,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:59:52,057 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:52,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 55 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:59:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 19:59:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2022-04-06 19:59:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 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) [2022-04-06 19:59:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-06 19:59:52,064 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 18 [2022-04-06 19:59:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:52,064 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-06 19:59:52,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 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) [2022-04-06 19:59:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-06 19:59:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 19:59:52,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:52,065 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:52,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 19:59:52,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 19:59:52,285 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash -41723686, now seen corresponding path program 1 times [2022-04-06 19:59:52,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:52,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [533627301] [2022-04-06 19:59:52,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:52,288 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash -41723686, now seen corresponding path program 2 times [2022-04-06 19:59:52,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:52,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576987387] [2022-04-06 19:59:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:52,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:52,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:52,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:52,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576987387] [2022-04-06 19:59:52,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576987387] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:52,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447977882] [2022-04-06 19:59:52,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:59:52,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:52,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:52,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:59:52,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:59:52,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:59:52,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:59:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:52,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:52,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447977882] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:52,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:52,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:59:52,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:52,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [533627301] [2022-04-06 19:59:52,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [533627301] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:52,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:52,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:59:52,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779123013] [2022-04-06 19:59:52,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:52,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:59:52,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:59:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:59:52,482 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 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) [2022-04-06 19:59:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:52,597 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-04-06 19:59:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:59:52,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 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 18 [2022-04-06 19:59:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:52,598 INFO L225 Difference]: With dead ends: 53 [2022-04-06 19:59:52,598 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 19:59:52,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:59:52,599 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:52,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 55 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:59:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 19:59:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-04-06 19:59:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.4) internal successors, (49), 36 states have internal predecessors, (49), 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) [2022-04-06 19:59:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2022-04-06 19:59:52,606 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 18 [2022-04-06 19:59:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:52,607 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2022-04-06 19:59:52,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 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) [2022-04-06 19:59:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2022-04-06 19:59:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:59:52,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:52,607 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:52,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:59:52,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:52,824 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2044959957, now seen corresponding path program 1 times [2022-04-06 19:59:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:52,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1869951995] [2022-04-06 19:59:52,826 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:52,827 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2044959957, now seen corresponding path program 2 times [2022-04-06 19:59:52,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:52,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154484397] [2022-04-06 19:59:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:52,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:52,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:52,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154484397] [2022-04-06 19:59:52,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154484397] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:52,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645947660] [2022-04-06 19:59:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:59:52,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:52,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:59:52,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:59:52,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:59:52,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:59:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:53,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:59:53,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645947660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:53,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:59:53,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2022-04-06 19:59:53,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:53,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1869951995] [2022-04-06 19:59:53,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1869951995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:53,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:53,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:59:53,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792351060] [2022-04-06 19:59:53,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:53,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:59:53,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:59:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:59:53,006 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:53,018 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2022-04-06 19:59:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:59:53,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 21 [2022-04-06 19:59:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:53,019 INFO L225 Difference]: With dead ends: 62 [2022-04-06 19:59:53,019 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 19:59:53,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:59:53,020 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:53,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:59:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 19:59:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-04-06 19:59:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-04-06 19:59:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-04-06 19:59:53,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2022-04-06 19:59:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:53,025 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-04-06 19:59:53,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-06 19:59:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 19:59:53,026 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:53,026 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:53,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:59:53,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:53,242 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1943105420, now seen corresponding path program 1 times [2022-04-06 19:59:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [290348335] [2022-04-06 19:59:53,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:53,244 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1943105420, now seen corresponding path program 2 times [2022-04-06 19:59:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:53,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102665079] [2022-04-06 19:59:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:53,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:53,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:59:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:53,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102665079] [2022-04-06 19:59:53,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102665079] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321181909] [2022-04-06 19:59:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:59:53,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:53,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:59:53,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:59:53,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:59:53,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:53,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:59:53,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:53,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:59:53,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321181909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:53,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:59:53,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-04-06 19:59:53,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:53,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [290348335] [2022-04-06 19:59:53,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [290348335] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:53,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:53,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:59:53,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357578938] [2022-04-06 19:59:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:53,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:59:53,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:53,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:59:53,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:59:53,478 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:59:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:53,490 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-04-06 19:59:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:59:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-06 19:59:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:53,491 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:59:53,491 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 19:59:53,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:59:53,491 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:53,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:59:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 19:59:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 19:59:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 19:59:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 19:59:53,492 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-04-06 19:59:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:53,492 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 19:59:53,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:59:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 19:59:53,493 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 19:59:53,495 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:59:53,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 19:59:53,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:53,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 19:59:54,009 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-04-06 19:59:54,010 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-04-06 19:59:54,010 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-04-06 19:59:54,010 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-04-06 19:59:54,010 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-04-06 19:59:54,010 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-04-06 19:59:54,010 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-04-06 19:59:54,010 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= 10000 main_~c3~0) (<= 4000 main_~c1~0) (<= 2000 main_~c2~0)) [2022-04-06 19:59:54,010 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 24 52) the Hoare annotation is: true [2022-04-06 19:59:54,010 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 24 52) the Hoare annotation is: true [2022-04-06 19:59:54,010 INFO L878 garLoopResultBuilder]: At program point L46-2(lines 46 50) the Hoare annotation is: (let ((.cse0 (<= 10000 main_~c3~0)) (.cse1 (<= 4000 main_~c1~0)) (.cse2 (< main_~n~0 2)) (.cse3 (<= 2000 main_~c2~0)) (.cse4 (<= 1 main_~i~0))) (or (and .cse0 (<= 0 main_~j~0) (<= 2000 main_~k~0) .cse1 .cse2 .cse3 .cse4) (and (= main_~j~0 0) (= main_~i~0 0) (<= main_~n~0 0)) (and .cse0 (<= 1 main_~j~0) .cse1 .cse2 .cse3 .cse4))) [2022-04-06 19:59:54,010 INFO L885 garLoopResultBuilder]: At program point L46-3(lines 46 50) the Hoare annotation is: true [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 43) the Hoare annotation is: (and (<= 10000 main_~c3~0) (= main_~k~0 0) (<= 4000 main_~c1~0) (< main_~n~0 2) (<= 2000 main_~c2~0) (<= 1 main_~i~0)) [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point L38(lines 38 43) the Hoare annotation is: (and (<= 10000 main_~c3~0) (= main_~k~0 0) (<= 4000 main_~c1~0) (< main_~n~0 2) (<= 2000 main_~c2~0) (<= 1 main_~i~0)) [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point L40-2(lines 34 44) the Hoare annotation is: (let ((.cse0 (<= 10000 main_~c3~0)) (.cse1 (<= 4000 main_~c1~0)) (.cse2 (<= 2000 main_~c2~0))) (or (and .cse0 (<= 2000 main_~k~0) .cse1 (< main_~n~0 2) .cse2 (<= 1 main_~i~0)) (and .cse0 (= main_~k~0 0) .cse1 (= main_~i~0 0) .cse2))) [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 44) the Hoare annotation is: (or (and (= main_~i~0 0) (<= main_~n~0 0)) (and (<= 10000 main_~c3~0) (<= 2000 main_~k~0) (<= 4000 main_~c1~0) (< main_~n~0 2) (<= 2000 main_~c2~0) (<= 1 main_~i~0))) [2022-04-06 19:59:54,011 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 52) the Hoare annotation is: true [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (and (<= 10000 main_~c3~0) (<= 0 main_~j~0) (<= 2000 main_~k~0) (<= 4000 main_~c1~0) (< main_~n~0 2) (<= 2000 main_~c2~0) (<= 1 main_~i~0)) [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (and (<= 10000 main_~c3~0) (<= 0 main_~j~0) (<= 4000 main_~c1~0) (< main_~n~0 2) (<= 2000 main_~c2~0) (<= 1 main_~i~0)) [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= 10000 main_~c3~0) (= main_~k~0 0) (<= 4000 main_~c1~0) (<= 2000 main_~c2~0) (<= 1 main_~i~0)) [2022-04-06 19:59:54,011 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:59:54,011 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 19:59:54,011 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:59:54,011 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:59:54,011 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 19:59:54,012 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 19:59:54,012 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:59:54,012 INFO L878 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:59:54,012 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-04-06 19:59:54,012 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:59:54,012 INFO L878 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:59:54,012 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:59:54,012 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:59:54,014 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2] [2022-04-06 19:59:54,015 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 19:59:54,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:59:54 BoogieIcfgContainer [2022-04-06 19:59:54,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 19:59:54,041 INFO L158 Benchmark]: Toolchain (without parser) took 4146.16ms. Allocated memory was 185.6MB in the beginning and 316.7MB in the end (delta: 131.1MB). Free memory was 130.1MB in the beginning and 134.8MB in the end (delta: -4.7MB). Peak memory consumption was 127.7MB. Max. memory is 8.0GB. [2022-04-06 19:59:54,041 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 185.6MB. Free memory is still 146.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 19:59:54,042 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.30ms. Allocated memory was 185.6MB in the beginning and 316.7MB in the end (delta: 131.1MB). Free memory was 129.8MB in the beginning and 287.2MB in the end (delta: -157.4MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-04-06 19:59:54,042 INFO L158 Benchmark]: Boogie Preprocessor took 27.53ms. Allocated memory is still 316.7MB. Free memory was 287.2MB in the beginning and 285.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 19:59:54,042 INFO L158 Benchmark]: RCFGBuilder took 225.52ms. Allocated memory is still 316.7MB. Free memory was 285.7MB in the beginning and 274.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 19:59:54,042 INFO L158 Benchmark]: TraceAbstraction took 3641.75ms. Allocated memory is still 316.7MB. Free memory was 274.2MB in the beginning and 134.8MB in the end (delta: 139.4MB). Peak memory consumption was 140.4MB. Max. memory is 8.0GB. [2022-04-06 19:59:54,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 185.6MB. Free memory is still 146.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 235.30ms. Allocated memory was 185.6MB in the beginning and 316.7MB in the end (delta: 131.1MB). Free memory was 129.8MB in the beginning and 287.2MB in the end (delta: -157.4MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.53ms. Allocated memory is still 316.7MB. Free memory was 287.2MB in the beginning and 285.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 225.52ms. Allocated memory is still 316.7MB. Free memory was 285.7MB in the beginning and 274.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3641.75ms. Allocated memory is still 316.7MB. Free memory was 274.2MB in the beginning and 134.8MB in the end (delta: 139.4MB). Peak memory consumption was 140.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 202 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 200 mSDsluCounter, 271 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 126 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 462 IncrementalHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 145 mSDtfsCounter, 462 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 220 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 26 LocationsWithAnnotation, 50 PreInvPairs, 72 NumberOfFragments, 268 HoareAnnotationTreeSize, 50 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 26 FomulaSimplificationsInter, 279 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((10000 <= c3 && 2000 <= k) && 4000 <= c1) && n < 2) && 2000 <= c2) && 1 <= i) || ((((10000 <= c3 && k == 0) && 4000 <= c1) && i == 0) && 2000 <= c2) - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((10000 <= c3 && 0 <= j) && 2000 <= k) && 4000 <= c1) && n < 2) && 2000 <= c2) && 1 <= i) || ((j == 0 && i == 0) && n <= 0)) || (((((10000 <= c3 && 1 <= j) && 4000 <= c1) && n < 2) && 2000 <= c2) && 1 <= i) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! [2022-04-06 19:59:54,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...