/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/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:24:28,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:24:28,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:24:28,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:24:28,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:24:28,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:24:28,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:24:28,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:24:28,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:24:28,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:24:28,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:24:28,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:24:28,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:24:28,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:24:28,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:24:28,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:24:28,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:24:28,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:24:28,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:24:28,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:24:28,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:24:28,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:24:28,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:24:28,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:24:28,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:24:28,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:24:28,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:24:28,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:24:28,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:24:28,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:24:28,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:24:28,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:24:28,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:24:28,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:24:28,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:24:28,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:24:28,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:24:28,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:24:28,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:24:28,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:24:28,374 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:24:28,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:24:28,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:24:28,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:24:28,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:24:28,578 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:24:28,579 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:24:28,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-01-31 23:24:28,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d732c0766/e09bf55e2fb340088f52e29f991b7824/FLAGed4d40c0b [2022-01-31 23:24:28,961 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:24:28,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-01-31 23:24:28,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d732c0766/e09bf55e2fb340088f52e29f991b7824/FLAGed4d40c0b [2022-01-31 23:24:28,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d732c0766/e09bf55e2fb340088f52e29f991b7824 [2022-01-31 23:24:28,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:24:28,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:24:28,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:24:28,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:24:28,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:24:28,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:24:28" (1/1) ... [2022-01-31 23:24:28,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f06ae87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:28, skipping insertion in model container [2022-01-31 23:24:28,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:24:28" (1/1) ... [2022-01-31 23:24:28,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:24:28,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:24:29,095 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/sendmail-close-angle.i[893,906] [2022-01-31 23:24:29,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:24:29,123 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:24:29,135 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/sendmail-close-angle.i[893,906] [2022-01-31 23:24:29,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:24:29,147 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:24:29,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29 WrapperNode [2022-01-31 23:24:29,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:24:29,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:24:29,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:24:29,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:24:29,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:24:29,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:24:29,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:24:29,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:24:29,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (1/1) ... [2022-01-31 23:24:29,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:24:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:24:29,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 23:24:29,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 23:24:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:24:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:24:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:24:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:24:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:24:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:24:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:24:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:24:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 23:24:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 23:24:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:24:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:24:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:24:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:24:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:24:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:24:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:24:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:24:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:24:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:24:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:24:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:24:29,357 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:24:29,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:24:29,518 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:24:29,527 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:24:29,527 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:24:29,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:24:29 BoogieIcfgContainer [2022-01-31 23:24:29,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:24:29,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:24:29,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:24:29,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:24:29,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:24:28" (1/3) ... [2022-01-31 23:24:29,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275a5305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:24:29, skipping insertion in model container [2022-01-31 23:24:29,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:24:29" (2/3) ... [2022-01-31 23:24:29,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275a5305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:24:29, skipping insertion in model container [2022-01-31 23:24:29,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:24:29" (3/3) ... [2022-01-31 23:24:29,535 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2022-01-31 23:24:29,539 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:24:29,540 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:24:29,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:24:29,586 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=QVASR [2022-01-31 23:24:29,586 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:24:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:24:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 23:24:29,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:29,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:29,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:29,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1361038294, now seen corresponding path program 1 times [2022-01-31 23:24:29,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624366090] [2022-01-31 23:24:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:29,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:29,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:29,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:24:29,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624366090] [2022-01-31 23:24:29,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [624366090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:29,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:29,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:24:29,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139273531] [2022-01-31 23:24:29,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:29,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:24:29,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:24:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:24:29,788 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-01-31 23:24:29,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:29,841 INFO L93 Difference]: Finished difference Result 62 states and 93 transitions. [2022-01-31 23:24:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:24:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-01-31 23:24:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:29,848 INFO L225 Difference]: With dead ends: 62 [2022-01-31 23:24:29,848 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 23:24:29,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:24:29,852 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:29,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:24:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 23:24:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 23:24:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 23:24:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-01-31 23:24:29,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-01-31 23:24:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:29,886 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-01-31 23:24:29,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-01-31 23:24:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-01-31 23:24:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 23:24:29,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:29,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:29,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:24:29,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1347976123, now seen corresponding path program 1 times [2022-01-31 23:24:29,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:29,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446765775] [2022-01-31 23:24:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:29,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:29,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:24:30,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446765775] [2022-01-31 23:24:30,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [446765775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:30,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:30,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:24:30,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683941241] [2022-01-31 23:24:30,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:30,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:24:30,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:24:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:24:30,010 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:24:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:30,154 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-01-31 23:24:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:24:30,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 23:24:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:30,156 INFO L225 Difference]: With dead ends: 36 [2022-01-31 23:24:30,156 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 23:24:30,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:24:30,160 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:30,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:24:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 23:24:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 23:24:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 23:24:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 23:24:30,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2022-01-31 23:24:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:30,179 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 23:24:30,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:24:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 23:24:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 23:24:30,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:30,181 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:30,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:24:30,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash -863391162, now seen corresponding path program 1 times [2022-01-31 23:24:30,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:30,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641052671] [2022-01-31 23:24:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:30,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:30,184 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:24:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:24:30,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:30,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641052671] [2022-01-31 23:24:30,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1641052671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:30,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:30,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:24:30,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850109030] [2022-01-31 23:24:30,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:30,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:24:30,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:24:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:24:30,247 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:24:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:30,406 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-01-31 23:24:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:24:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 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 21 [2022-01-31 23:24:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:30,407 INFO L225 Difference]: With dead ends: 49 [2022-01-31 23:24:30,407 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 23:24:30,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:24:30,408 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:30,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:24:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 23:24:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-01-31 23:24:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 23:24:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-01-31 23:24:30,417 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2022-01-31 23:24:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:30,417 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-01-31 23:24:30,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:24:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-01-31 23:24:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:24:30,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:30,419 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:30,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:24:30,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1742477006, now seen corresponding path program 1 times [2022-01-31 23:24:30,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:30,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781330886] [2022-01-31 23:24:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:30,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:30,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:24:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:24:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:24:30,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781330886] [2022-01-31 23:24:30,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781330886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:30,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:30,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:24:30,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116594329] [2022-01-31 23:24:30,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:30,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:24:30,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:24:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:24:30,501 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:24:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:30,663 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-01-31 23:24:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:24:30,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-01-31 23:24:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:30,664 INFO L225 Difference]: With dead ends: 56 [2022-01-31 23:24:30,664 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 23:24:30,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:24:30,665 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:30,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 66 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:24:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 23:24:30,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-01-31 23:24:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 23:24:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-01-31 23:24:30,693 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2022-01-31 23:24:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:30,693 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-01-31 23:24:30,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:24:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-01-31 23:24:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 23:24:30,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:30,695 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:30,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:24:30,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1571308956, now seen corresponding path program 1 times [2022-01-31 23:24:30,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:30,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935434708] [2022-01-31 23:24:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:30,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:30,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:24:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:24:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 23:24:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:24:30,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935434708] [2022-01-31 23:24:30,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [935434708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:30,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:30,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:24:30,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651376612] [2022-01-31 23:24:30,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:30,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:24:30,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:30,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:24:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:24:30,795 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 23:24:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:31,001 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-01-31 23:24:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:24:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-01-31 23:24:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:31,004 INFO L225 Difference]: With dead ends: 75 [2022-01-31 23:24:31,004 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 23:24:31,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:24:31,005 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:31,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 45 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:24:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 23:24:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-01-31 23:24:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 23:24:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-01-31 23:24:31,014 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2022-01-31 23:24:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:31,014 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-01-31 23:24:31,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 23:24:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-01-31 23:24:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 23:24:31,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:31,015 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:31,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:24:31,016 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 173943289, now seen corresponding path program 1 times [2022-01-31 23:24:31,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:31,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429921437] [2022-01-31 23:24:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:31,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:31,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:31,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:31,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:24:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:31,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:24:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:31,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 23:24:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:24:31,095 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:31,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429921437] [2022-01-31 23:24:31,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429921437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:31,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:31,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:24:31,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325876624] [2022-01-31 23:24:31,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:31,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:24:31,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:24:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:24:31,097 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 23:24:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:31,282 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-01-31 23:24:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:24:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-01-31 23:24:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:31,284 INFO L225 Difference]: With dead ends: 77 [2022-01-31 23:24:31,284 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 23:24:31,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:24:31,285 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:31,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 56 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:24:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 23:24:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-01-31 23:24:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 23:24:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-01-31 23:24:31,293 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2022-01-31 23:24:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:31,293 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-01-31 23:24:31,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 23:24:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-01-31 23:24:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 23:24:31,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:31,295 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:31,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:24:31,295 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1755534668, now seen corresponding path program 1 times [2022-01-31 23:24:31,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:31,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566365155] [2022-01-31 23:24:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:31,311 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:493) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:426) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkEquivalence(SmtUtils.java:2374) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.areFormulasEquivalent(SmtUtils.java:2366) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrUtils.checkTermEquiv(QvasrUtils.java:211) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.simplifyRealMultiplication(QvasrAbstractor.java:720) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.gaussPartialPivot(QvasrAbstractor.java:196) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.gaussianSolve(QvasrAbstractor.java:132) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.computeAbstraction(QvasrAbstractor.java:111) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:133) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:79) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:210) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:185) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-31 23:24:31,314 INFO L158 Benchmark]: Toolchain (without parser) took 2335.02ms. Allocated memory was 212.9MB in the beginning and 351.3MB in the end (delta: 138.4MB). Free memory was 157.9MB in the beginning and 167.4MB in the end (delta: -9.4MB). Peak memory consumption was 129.3MB. Max. memory is 8.0GB. [2022-01-31 23:24:31,314 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 212.9MB. Free memory is still 174.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:24:31,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.93ms. Allocated memory was 212.9MB in the beginning and 351.3MB in the end (delta: 138.4MB). Free memory was 157.8MB in the beginning and 322.1MB in the end (delta: -164.3MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-01-31 23:24:31,314 INFO L158 Benchmark]: Boogie Preprocessor took 34.41ms. Allocated memory is still 351.3MB. Free memory was 322.1MB in the beginning and 320.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 23:24:31,314 INFO L158 Benchmark]: RCFGBuilder took 346.02ms. Allocated memory is still 351.3MB. Free memory was 320.5MB in the beginning and 307.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 23:24:31,315 INFO L158 Benchmark]: TraceAbstraction took 1783.33ms. Allocated memory is still 351.3MB. Free memory was 307.4MB in the beginning and 167.4MB in the end (delta: 140.0MB). Peak memory consumption was 140.5MB. Max. memory is 8.0GB. [2022-01-31 23:24:31,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 212.9MB. Free memory is still 174.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 167.93ms. Allocated memory was 212.9MB in the beginning and 351.3MB in the end (delta: 138.4MB). Free memory was 157.8MB in the beginning and 322.1MB in the end (delta: -164.3MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.41ms. Allocated memory is still 351.3MB. Free memory was 322.1MB in the beginning and 320.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 346.02ms. Allocated memory is still 351.3MB. Free memory was 320.5MB in the beginning and 307.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 1783.33ms. Allocated memory is still 351.3MB. Free memory was 307.4MB in the beginning and 167.4MB in the end (delta: 140.0MB). Peak memory consumption was 140.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:493) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-31 23:24:31,336 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...