/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 01:43:16,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 01:43:16,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 01:43:16,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 01:43:16,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 01:43:16,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 01:43:16,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 01:43:16,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 01:43:16,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 01:43:16,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 01:43:16,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 01:43:16,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 01:43:16,269 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 01:43:16,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 01:43:16,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 01:43:16,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 01:43:16,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 01:43:16,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 01:43:16,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 01:43:16,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 01:43:16,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 01:43:16,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 01:43:16,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 01:43:16,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 01:43:16,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 01:43:16,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 01:43:16,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 01:43:16,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 01:43:16,322 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 01:43:16,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 01:43:16,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 01:43:16,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 01:43:16,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 01:43:16,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 01:43:16,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 01:43:16,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 01:43:16,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 01:43:16,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 01:43:16,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 01:43:16,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 01:43:16,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 01:43:16,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:43:16,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 01:43:16,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 01:43:16,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 01:43:16,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 01:43:16,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 01:43:16,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 01:43:16,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 01:43:16,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 01:43:16,325 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 01:43:16,325 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 01:43:16,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 01:43:16,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 01:43:16,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 01:43:16,524 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 01:43:16,525 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 01:43:16,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2022-03-19 01:43:16,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d80f8b0a/fdffc02192da40719729926d30b03d07/FLAGbd771a666 [2022-03-19 01:43:16,878 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 01:43:16,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2022-03-19 01:43:16,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d80f8b0a/fdffc02192da40719729926d30b03d07/FLAGbd771a666 [2022-03-19 01:43:17,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d80f8b0a/fdffc02192da40719729926d30b03d07 [2022-03-19 01:43:17,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 01:43:17,298 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 01:43:17,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 01:43:17,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 01:43:17,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 01:43:17,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5549052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17, skipping insertion in model container [2022-03-19 01:43:17,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 01:43:17,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 01:43:17,476 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2022-03-19 01:43:17,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:43:17,489 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 01:43:17,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2022-03-19 01:43:17,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:43:17,521 INFO L208 MainTranslator]: Completed translation [2022-03-19 01:43:17,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17 WrapperNode [2022-03-19 01:43:17,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 01:43:17,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 01:43:17,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 01:43:17,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 01:43:17,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 01:43:17,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 01:43:17,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 01:43:17,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 01:43:17,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:43:17,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:43:17,630 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) [2022-03-19 01:43:17,667 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 [2022-03-19 01:43:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 01:43:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 01:43:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 01:43:17,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 01:43:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 01:43:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 01:43:17,766 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 01:43:17,768 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 01:43:17,938 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 01:43:17,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 01:43:17,943 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 01:43:17,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:43:17 BoogieIcfgContainer [2022-03-19 01:43:17,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 01:43:17,945 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 01:43:17,945 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 01:43:17,948 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 01:43:17,950 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:43:17" (1/1) ... [2022-03-19 01:43:17,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:43:17 BasicIcfg [2022-03-19 01:43:17,971 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 01:43:17,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 01:43:17,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 01:43:17,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 01:43:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:43:17" (1/4) ... [2022-03-19 01:43:17,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6f0e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:43:17, skipping insertion in model container [2022-03-19 01:43:17,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:43:17" (2/4) ... [2022-03-19 01:43:17,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6f0e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:43:17, skipping insertion in model container [2022-03-19 01:43:17,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:43:17" (3/4) ... [2022-03-19 01:43:17,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6f0e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:43:17, skipping insertion in model container [2022-03-19 01:43:17,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:43:17" (4/4) ... [2022-03-19 01:43:17,982 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.cqvasr [2022-03-19 01:43:17,986 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 01:43:17,986 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 01:43:18,026 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 01:43:18,032 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 01:43:18,032 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 01:43:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 01:43:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 01:43:18,057 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:18,057 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:18,058 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1766201146, now seen corresponding path program 1 times [2022-03-19 01:43:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:18,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114307816] [2022-03-19 01:43:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:18,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:18,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:18,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114307816] [2022-03-19 01:43:18,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114307816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:18,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:18,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217935663] [2022-03-19 01:43:18,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:18,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:18,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:18,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:18,302 INFO L87 Difference]: Start difference. First operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:18,440 INFO L93 Difference]: Finished difference Result 94 states and 163 transitions. [2022-03-19 01:43:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:18,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-19 01:43:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:18,448 INFO L225 Difference]: With dead ends: 94 [2022-03-19 01:43:18,448 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 01:43:18,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:18,452 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 191 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:18,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 95 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 01:43:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2022-03-19 01:43:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 98 transitions. [2022-03-19 01:43:18,483 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 98 transitions. Word has length 22 [2022-03-19 01:43:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:18,484 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 98 transitions. [2022-03-19 01:43:18,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 98 transitions. [2022-03-19 01:43:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 01:43:18,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:18,485 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:18,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 01:43:18,485 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:18,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2023207525, now seen corresponding path program 1 times [2022-03-19 01:43:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624726706] [2022-03-19 01:43:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:18,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:18,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:18,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624726706] [2022-03-19 01:43:18,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624726706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:18,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:18,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:18,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209260461] [2022-03-19 01:43:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:18,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:18,537 INFO L87 Difference]: Start difference. First operand 55 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:18,688 INFO L93 Difference]: Finished difference Result 128 states and 233 transitions. [2022-03-19 01:43:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:18,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-19 01:43:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:18,693 INFO L225 Difference]: With dead ends: 128 [2022-03-19 01:43:18,693 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 01:43:18,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:18,698 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:18,699 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 103 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 01:43:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-03-19 01:43:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 73 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 138 transitions. [2022-03-19 01:43:18,708 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 138 transitions. Word has length 22 [2022-03-19 01:43:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:18,708 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 138 transitions. [2022-03-19 01:43:18,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 138 transitions. [2022-03-19 01:43:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 01:43:18,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:18,709 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:18,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 01:43:18,709 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1082371358, now seen corresponding path program 1 times [2022-03-19 01:43:18,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:18,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651956567] [2022-03-19 01:43:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:18,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:18,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:18,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651956567] [2022-03-19 01:43:18,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651956567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:18,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:18,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:18,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7277679] [2022-03-19 01:43:18,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:18,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:18,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:18,766 INFO L87 Difference]: Start difference. First operand 77 states and 138 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:18,841 INFO L93 Difference]: Finished difference Result 118 states and 208 transitions. [2022-03-19 01:43:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:18,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 01:43:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:18,844 INFO L225 Difference]: With dead ends: 118 [2022-03-19 01:43:18,844 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 01:43:18,845 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:18,852 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:18,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 01:43:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-03-19 01:43:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 76 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 140 transitions. [2022-03-19 01:43:18,859 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 140 transitions. Word has length 23 [2022-03-19 01:43:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:18,859 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 140 transitions. [2022-03-19 01:43:18,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 140 transitions. [2022-03-19 01:43:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 01:43:18,860 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:18,860 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:18,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 01:43:18,861 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1705044129, now seen corresponding path program 1 times [2022-03-19 01:43:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:18,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383406832] [2022-03-19 01:43:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:18,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:18,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:18,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383406832] [2022-03-19 01:43:18,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383406832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:18,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:18,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:18,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428887578] [2022-03-19 01:43:18,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:18,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:18,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:18,928 INFO L87 Difference]: Start difference. First operand 80 states and 140 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,029 INFO L93 Difference]: Finished difference Result 149 states and 265 transitions. [2022-03-19 01:43:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 01:43:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,031 INFO L225 Difference]: With dead ends: 149 [2022-03-19 01:43:19,031 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 01:43:19,031 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,038 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 01:43:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2022-03-19 01:43:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.801980198019802) internal successors, (182), 101 states have internal predecessors, (182), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 185 transitions. [2022-03-19 01:43:19,051 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 185 transitions. Word has length 23 [2022-03-19 01:43:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,051 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 185 transitions. [2022-03-19 01:43:19,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 185 transitions. [2022-03-19 01:43:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 01:43:19,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,055 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:19,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 01:43:19,055 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2084364542, now seen corresponding path program 1 times [2022-03-19 01:43:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952700253] [2022-03-19 01:43:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952700253] [2022-03-19 01:43:19,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952700253] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337077323] [2022-03-19 01:43:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,109 INFO L87 Difference]: Start difference. First operand 105 states and 185 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,178 INFO L93 Difference]: Finished difference Result 245 states and 439 transitions. [2022-03-19 01:43:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 01:43:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,180 INFO L225 Difference]: With dead ends: 245 [2022-03-19 01:43:19,182 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 01:43:19,183 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,186 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 105 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 01:43:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-03-19 01:43:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.7902097902097902) internal successors, (256), 143 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 259 transitions. [2022-03-19 01:43:19,194 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 259 transitions. Word has length 23 [2022-03-19 01:43:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,194 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 259 transitions. [2022-03-19 01:43:19,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 259 transitions. [2022-03-19 01:43:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 01:43:19,195 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,195 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:19,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 01:43:19,195 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1316728287, now seen corresponding path program 1 times [2022-03-19 01:43:19,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865504795] [2022-03-19 01:43:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865504795] [2022-03-19 01:43:19,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865504795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43457273] [2022-03-19 01:43:19,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,230 INFO L87 Difference]: Start difference. First operand 147 states and 259 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,301 INFO L93 Difference]: Finished difference Result 220 states and 386 transitions. [2022-03-19 01:43:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 01:43:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,302 INFO L225 Difference]: With dead ends: 220 [2022-03-19 01:43:19,302 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 01:43:19,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,306 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 120 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 01:43:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-03-19 01:43:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.7655172413793103) internal successors, (256), 145 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 259 transitions. [2022-03-19 01:43:19,325 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 259 transitions. Word has length 24 [2022-03-19 01:43:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,326 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 259 transitions. [2022-03-19 01:43:19,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 259 transitions. [2022-03-19 01:43:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 01:43:19,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,327 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:19,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 01:43:19,327 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash 190823522, now seen corresponding path program 1 times [2022-03-19 01:43:19,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491287974] [2022-03-19 01:43:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491287974] [2022-03-19 01:43:19,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491287974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069215065] [2022-03-19 01:43:19,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,382 INFO L87 Difference]: Start difference. First operand 149 states and 259 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,443 INFO L93 Difference]: Finished difference Result 277 states and 489 transitions. [2022-03-19 01:43:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 01:43:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,444 INFO L225 Difference]: With dead ends: 277 [2022-03-19 01:43:19,444 INFO L226 Difference]: Without dead ends: 275 [2022-03-19 01:43:19,445 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,445 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,446 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-19 01:43:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 201. [2022-03-19 01:43:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.7461928934010151) internal successors, (344), 197 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 347 transitions. [2022-03-19 01:43:19,452 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 347 transitions. Word has length 24 [2022-03-19 01:43:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,452 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 347 transitions. [2022-03-19 01:43:19,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 347 transitions. [2022-03-19 01:43:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 01:43:19,453 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,453 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:43:19,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 01:43:19,454 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash -314735103, now seen corresponding path program 1 times [2022-03-19 01:43:19,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893282302] [2022-03-19 01:43:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893282302] [2022-03-19 01:43:19,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893282302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935977551] [2022-03-19 01:43:19,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,500 INFO L87 Difference]: Start difference. First operand 201 states and 347 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,565 INFO L93 Difference]: Finished difference Result 473 states and 825 transitions. [2022-03-19 01:43:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 01:43:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,566 INFO L225 Difference]: With dead ends: 473 [2022-03-19 01:43:19,567 INFO L226 Difference]: Without dead ends: 283 [2022-03-19 01:43:19,567 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,568 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,568 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 107 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-19 01:43:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-03-19 01:43:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 277 states have (on average 1.7328519855595668) internal successors, (480), 277 states have internal predecessors, (480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 483 transitions. [2022-03-19 01:43:19,575 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 483 transitions. Word has length 24 [2022-03-19 01:43:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,575 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 483 transitions. [2022-03-19 01:43:19,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 483 transitions. [2022-03-19 01:43:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 01:43:19,576 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,576 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:19,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 01:43:19,577 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1620594170, now seen corresponding path program 1 times [2022-03-19 01:43:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289523139] [2022-03-19 01:43:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289523139] [2022-03-19 01:43:19,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289523139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792439509] [2022-03-19 01:43:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,608 INFO L87 Difference]: Start difference. First operand 281 states and 483 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,661 INFO L93 Difference]: Finished difference Result 421 states and 721 transitions. [2022-03-19 01:43:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 01:43:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,663 INFO L225 Difference]: With dead ends: 421 [2022-03-19 01:43:19,663 INFO L226 Difference]: Without dead ends: 287 [2022-03-19 01:43:19,664 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,664 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 117 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-19 01:43:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-03-19 01:43:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 281 states have (on average 1.708185053380783) internal successors, (480), 281 states have internal predecessors, (480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 483 transitions. [2022-03-19 01:43:19,671 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 483 transitions. Word has length 25 [2022-03-19 01:43:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,673 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 483 transitions. [2022-03-19 01:43:19,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 483 transitions. [2022-03-19 01:43:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 01:43:19,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,674 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:19,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 01:43:19,674 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1166821317, now seen corresponding path program 1 times [2022-03-19 01:43:19,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561477571] [2022-03-19 01:43:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561477571] [2022-03-19 01:43:19,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561477571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436111003] [2022-03-19 01:43:19,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,708 INFO L87 Difference]: Start difference. First operand 285 states and 483 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,764 INFO L93 Difference]: Finished difference Result 817 states and 1389 transitions. [2022-03-19 01:43:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 01:43:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,766 INFO L225 Difference]: With dead ends: 817 [2022-03-19 01:43:19,766 INFO L226 Difference]: Without dead ends: 547 [2022-03-19 01:43:19,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,767 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-03-19 01:43:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2022-03-19 01:43:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.6783733826247689) internal successors, (908), 541 states have internal predecessors, (908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 911 transitions. [2022-03-19 01:43:19,781 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 911 transitions. Word has length 25 [2022-03-19 01:43:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,781 INFO L478 AbstractCegarLoop]: Abstraction has 545 states and 911 transitions. [2022-03-19 01:43:19,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 911 transitions. [2022-03-19 01:43:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 01:43:19,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,783 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:19,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 01:43:19,784 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -661262692, now seen corresponding path program 1 times [2022-03-19 01:43:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828474564] [2022-03-19 01:43:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828474564] [2022-03-19 01:43:19,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828474564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812444096] [2022-03-19 01:43:19,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,836 INFO L87 Difference]: Start difference. First operand 545 states and 911 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:19,890 INFO L93 Difference]: Finished difference Result 677 states and 1153 transitions. [2022-03-19 01:43:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 01:43:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:19,892 INFO L225 Difference]: With dead ends: 677 [2022-03-19 01:43:19,892 INFO L226 Difference]: Without dead ends: 675 [2022-03-19 01:43:19,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:19,893 INFO L912 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:19,893 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-19 01:43:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 545. [2022-03-19 01:43:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.6635859519408502) internal successors, (900), 541 states have internal predecessors, (900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 903 transitions. [2022-03-19 01:43:19,905 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 903 transitions. Word has length 25 [2022-03-19 01:43:19,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:19,905 INFO L478 AbstractCegarLoop]: Abstraction has 545 states and 903 transitions. [2022-03-19 01:43:19,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 903 transitions. [2022-03-19 01:43:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 01:43:19,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:19,906 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:19,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 01:43:19,906 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1811690051, now seen corresponding path program 1 times [2022-03-19 01:43:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:19,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338123093] [2022-03-19 01:43:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338123093] [2022-03-19 01:43:19,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338123093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:19,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:19,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921636758] [2022-03-19 01:43:19,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:19,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:19,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:19,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:19,952 INFO L87 Difference]: Start difference. First operand 545 states and 903 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:20,011 INFO L93 Difference]: Finished difference Result 997 states and 1681 transitions. [2022-03-19 01:43:20,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:20,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 01:43:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:20,014 INFO L225 Difference]: With dead ends: 997 [2022-03-19 01:43:20,014 INFO L226 Difference]: Without dead ends: 995 [2022-03-19 01:43:20,015 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:20,015 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:20,015 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-19 01:43:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 769. [2022-03-19 01:43:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 765 states have (on average 1.6261437908496732) internal successors, (1244), 765 states have internal predecessors, (1244), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1247 transitions. [2022-03-19 01:43:20,055 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1247 transitions. Word has length 26 [2022-03-19 01:43:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:20,056 INFO L478 AbstractCegarLoop]: Abstraction has 769 states and 1247 transitions. [2022-03-19 01:43:20,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1247 transitions. [2022-03-19 01:43:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 01:43:20,057 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:20,057 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:20,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 01:43:20,057 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:20,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1977718620, now seen corresponding path program 1 times [2022-03-19 01:43:20,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:20,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969511142] [2022-03-19 01:43:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:20,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:20,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:20,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969511142] [2022-03-19 01:43:20,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969511142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:20,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:20,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:20,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900513762] [2022-03-19 01:43:20,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:20,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:20,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:20,093 INFO L87 Difference]: Start difference. First operand 769 states and 1247 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:20,158 INFO L93 Difference]: Finished difference Result 1813 states and 2961 transitions. [2022-03-19 01:43:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 01:43:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:20,161 INFO L225 Difference]: With dead ends: 1813 [2022-03-19 01:43:20,161 INFO L226 Difference]: Without dead ends: 1059 [2022-03-19 01:43:20,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:20,163 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:20,163 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 111 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-03-19 01:43:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1057. [2022-03-19 01:43:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1053 states have (on average 1.6144349477682811) internal successors, (1700), 1053 states have internal predecessors, (1700), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1703 transitions. [2022-03-19 01:43:20,184 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1703 transitions. Word has length 26 [2022-03-19 01:43:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:20,185 INFO L478 AbstractCegarLoop]: Abstraction has 1057 states and 1703 transitions. [2022-03-19 01:43:20,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1703 transitions. [2022-03-19 01:43:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 01:43:20,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:20,187 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:20,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 01:43:20,187 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash -327784201, now seen corresponding path program 1 times [2022-03-19 01:43:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60653244] [2022-03-19 01:43:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:20,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:20,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:20,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60653244] [2022-03-19 01:43:20,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60653244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:20,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:20,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853190811] [2022-03-19 01:43:20,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:20,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:20,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:20,216 INFO L87 Difference]: Start difference. First operand 1057 states and 1703 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:20,277 INFO L93 Difference]: Finished difference Result 1597 states and 2569 transitions. [2022-03-19 01:43:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:20,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 01:43:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:20,280 INFO L225 Difference]: With dead ends: 1597 [2022-03-19 01:43:20,280 INFO L226 Difference]: Without dead ends: 1083 [2022-03-19 01:43:20,281 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:20,281 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:20,282 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-03-19 01:43:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2022-03-19 01:43:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1077 states have (on average 1.5933147632311977) internal successors, (1716), 1077 states have internal predecessors, (1716), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1719 transitions. [2022-03-19 01:43:20,302 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1719 transitions. Word has length 27 [2022-03-19 01:43:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:20,302 INFO L478 AbstractCegarLoop]: Abstraction has 1081 states and 1719 transitions. [2022-03-19 01:43:20,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1719 transitions. [2022-03-19 01:43:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 01:43:20,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:20,304 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:20,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 01:43:20,304 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1179767608, now seen corresponding path program 1 times [2022-03-19 01:43:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:20,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464242839] [2022-03-19 01:43:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:20,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:20,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:20,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464242839] [2022-03-19 01:43:20,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464242839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:20,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:20,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:20,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803039598] [2022-03-19 01:43:20,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:20,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:20,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:20,342 INFO L87 Difference]: Start difference. First operand 1081 states and 1719 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:20,406 INFO L93 Difference]: Finished difference Result 1933 states and 3129 transitions. [2022-03-19 01:43:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 01:43:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:20,411 INFO L225 Difference]: With dead ends: 1933 [2022-03-19 01:43:20,411 INFO L226 Difference]: Without dead ends: 1931 [2022-03-19 01:43:20,413 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:20,414 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:20,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 79 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-03-19 01:43:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1545. [2022-03-19 01:43:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1541 states have (on average 1.5496430889033095) internal successors, (2388), 1541 states have internal predecessors, (2388), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2391 transitions. [2022-03-19 01:43:20,442 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2391 transitions. Word has length 27 [2022-03-19 01:43:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:20,442 INFO L478 AbstractCegarLoop]: Abstraction has 1545 states and 2391 transitions. [2022-03-19 01:43:20,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2391 transitions. [2022-03-19 01:43:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 01:43:20,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:20,445 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:20,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 01:43:20,445 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 674208983, now seen corresponding path program 1 times [2022-03-19 01:43:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:20,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134082471] [2022-03-19 01:43:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:20,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:20,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134082471] [2022-03-19 01:43:20,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134082471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:20,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:20,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847315652] [2022-03-19 01:43:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:20,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:20,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:20,475 INFO L87 Difference]: Start difference. First operand 1545 states and 2391 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:20,548 INFO L93 Difference]: Finished difference Result 3597 states and 5593 transitions. [2022-03-19 01:43:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 01:43:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:20,554 INFO L225 Difference]: With dead ends: 3597 [2022-03-19 01:43:20,554 INFO L226 Difference]: Without dead ends: 2091 [2022-03-19 01:43:20,556 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:20,557 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:20,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-03-19 01:43:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2089. [2022-03-19 01:43:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2085 states have (on average 1.5366906474820143) internal successors, (3204), 2085 states have internal predecessors, (3204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3207 transitions. [2022-03-19 01:43:20,596 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3207 transitions. Word has length 27 [2022-03-19 01:43:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:20,597 INFO L478 AbstractCegarLoop]: Abstraction has 2089 states and 3207 transitions. [2022-03-19 01:43:20,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3207 transitions. [2022-03-19 01:43:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:43:20,598 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:20,598 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:20,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 01:43:20,599 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2081877160, now seen corresponding path program 1 times [2022-03-19 01:43:20,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:20,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616263058] [2022-03-19 01:43:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:20,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:20,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616263058] [2022-03-19 01:43:20,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616263058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:20,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:20,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736245552] [2022-03-19 01:43:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:20,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:20,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:20,621 INFO L87 Difference]: Start difference. First operand 2089 states and 3207 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:20,686 INFO L93 Difference]: Finished difference Result 3133 states and 4793 transitions. [2022-03-19 01:43:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 01:43:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:20,707 INFO L225 Difference]: With dead ends: 3133 [2022-03-19 01:43:20,707 INFO L226 Difference]: Without dead ends: 2123 [2022-03-19 01:43:20,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:20,709 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:20,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 108 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-03-19 01:43:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2121. [2022-03-19 01:43:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2117 states have (on average 1.5134624468587623) internal successors, (3204), 2117 states have internal predecessors, (3204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3207 transitions. [2022-03-19 01:43:20,746 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3207 transitions. Word has length 28 [2022-03-19 01:43:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:20,746 INFO L478 AbstractCegarLoop]: Abstraction has 2121 states and 3207 transitions. [2022-03-19 01:43:20,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3207 transitions. [2022-03-19 01:43:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:43:20,748 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:20,748 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:20,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-19 01:43:20,749 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:20,749 INFO L85 PathProgramCache]: Analyzing trace with hash -574325351, now seen corresponding path program 1 times [2022-03-19 01:43:20,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:20,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622490958] [2022-03-19 01:43:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:20,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622490958] [2022-03-19 01:43:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622490958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:20,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569517080] [2022-03-19 01:43:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:20,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:20,775 INFO L87 Difference]: Start difference. First operand 2121 states and 3207 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:20,858 INFO L93 Difference]: Finished difference Result 3725 states and 5737 transitions. [2022-03-19 01:43:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 01:43:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:20,870 INFO L225 Difference]: With dead ends: 3725 [2022-03-19 01:43:20,870 INFO L226 Difference]: Without dead ends: 3723 [2022-03-19 01:43:20,871 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:20,872 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:20,872 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 78 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-03-19 01:43:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3081. [2022-03-19 01:43:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3077 states have (on average 1.4676633084172896) internal successors, (4516), 3077 states have internal predecessors, (4516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4519 transitions. [2022-03-19 01:43:20,937 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4519 transitions. Word has length 28 [2022-03-19 01:43:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:20,937 INFO L478 AbstractCegarLoop]: Abstraction has 3081 states and 4519 transitions. [2022-03-19 01:43:20,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4519 transitions. [2022-03-19 01:43:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:43:20,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:20,941 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:20,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-19 01:43:20,941 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1079883976, now seen corresponding path program 1 times [2022-03-19 01:43:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:20,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688193635] [2022-03-19 01:43:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:20,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688193635] [2022-03-19 01:43:20,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688193635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:20,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:20,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:20,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779412834] [2022-03-19 01:43:20,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:20,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:20,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:20,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:20,971 INFO L87 Difference]: Start difference. First operand 3081 states and 4519 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:21,061 INFO L93 Difference]: Finished difference Result 7117 states and 10473 transitions. [2022-03-19 01:43:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 01:43:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:21,072 INFO L225 Difference]: With dead ends: 7117 [2022-03-19 01:43:21,072 INFO L226 Difference]: Without dead ends: 4107 [2022-03-19 01:43:21,076 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:21,077 INFO L912 BasicCegarLoop]: 108 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:21,077 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 115 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-03-19 01:43:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2022-03-19 01:43:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.4523287003169958) internal successors, (5956), 4101 states have internal predecessors, (5956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5959 transitions. [2022-03-19 01:43:21,191 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5959 transitions. Word has length 28 [2022-03-19 01:43:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:21,192 INFO L478 AbstractCegarLoop]: Abstraction has 4105 states and 5959 transitions. [2022-03-19 01:43:21,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5959 transitions. [2022-03-19 01:43:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 01:43:21,195 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:21,195 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:21,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-19 01:43:21,195 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash -624183917, now seen corresponding path program 1 times [2022-03-19 01:43:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782768870] [2022-03-19 01:43:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:21,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:21,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:21,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782768870] [2022-03-19 01:43:21,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782768870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:21,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:21,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:21,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69873999] [2022-03-19 01:43:21,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:21,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:21,231 INFO L87 Difference]: Start difference. First operand 4105 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:21,312 INFO L93 Difference]: Finished difference Result 6157 states and 8905 transitions. [2022-03-19 01:43:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 01:43:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:21,334 INFO L225 Difference]: With dead ends: 6157 [2022-03-19 01:43:21,334 INFO L226 Difference]: Without dead ends: 4171 [2022-03-19 01:43:21,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:21,339 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 138 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:21,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 105 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2022-03-19 01:43:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4169. [2022-03-19 01:43:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4165 states have (on average 1.4300120048019207) internal successors, (5956), 4165 states have internal predecessors, (5956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 5959 transitions. [2022-03-19 01:43:21,421 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 5959 transitions. Word has length 29 [2022-03-19 01:43:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:21,421 INFO L478 AbstractCegarLoop]: Abstraction has 4169 states and 5959 transitions. [2022-03-19 01:43:21,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 5959 transitions. [2022-03-19 01:43:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 01:43:21,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:21,425 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:21,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-19 01:43:21,425 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 883367892, now seen corresponding path program 1 times [2022-03-19 01:43:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:21,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916848377] [2022-03-19 01:43:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:21,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:21,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916848377] [2022-03-19 01:43:21,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916848377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:21,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:21,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:21,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312251331] [2022-03-19 01:43:21,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:21,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:21,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:21,448 INFO L87 Difference]: Start difference. First operand 4169 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:21,547 INFO L93 Difference]: Finished difference Result 7181 states and 10441 transitions. [2022-03-19 01:43:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:21,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 01:43:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:21,558 INFO L225 Difference]: With dead ends: 7181 [2022-03-19 01:43:21,558 INFO L226 Difference]: Without dead ends: 7179 [2022-03-19 01:43:21,561 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:21,563 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:21,563 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-03-19 01:43:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6153. [2022-03-19 01:43:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6149 states have (on average 1.3849406407545943) internal successors, (8516), 6149 states have internal predecessors, (8516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8519 transitions. [2022-03-19 01:43:21,716 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8519 transitions. Word has length 29 [2022-03-19 01:43:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:21,716 INFO L478 AbstractCegarLoop]: Abstraction has 6153 states and 8519 transitions. [2022-03-19 01:43:21,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8519 transitions. [2022-03-19 01:43:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 01:43:21,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:21,723 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:21,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-19 01:43:21,723 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash 377809267, now seen corresponding path program 1 times [2022-03-19 01:43:21,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:21,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714989188] [2022-03-19 01:43:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:21,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:21,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:21,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714989188] [2022-03-19 01:43:21,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714989188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:21,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:21,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:21,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491070404] [2022-03-19 01:43:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:21,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:21,761 INFO L87 Difference]: Start difference. First operand 6153 states and 8519 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:21,902 INFO L93 Difference]: Finished difference Result 14093 states and 19529 transitions. [2022-03-19 01:43:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 01:43:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:21,915 INFO L225 Difference]: With dead ends: 14093 [2022-03-19 01:43:21,915 INFO L226 Difference]: Without dead ends: 8075 [2022-03-19 01:43:21,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:21,927 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:21,928 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 117 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2022-03-19 01:43:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8073. [2022-03-19 01:43:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8069 states have (on average 1.3647292105589293) internal successors, (11012), 8069 states have internal predecessors, (11012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 11015 transitions. [2022-03-19 01:43:22,129 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 11015 transitions. Word has length 29 [2022-03-19 01:43:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:22,129 INFO L478 AbstractCegarLoop]: Abstraction has 8073 states and 11015 transitions. [2022-03-19 01:43:22,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 11015 transitions. [2022-03-19 01:43:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 01:43:22,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:22,137 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:22,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-19 01:43:22,137 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1614633780, now seen corresponding path program 1 times [2022-03-19 01:43:22,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:22,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830903364] [2022-03-19 01:43:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:22,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830903364] [2022-03-19 01:43:22,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830903364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:22,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:22,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78058393] [2022-03-19 01:43:22,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:22,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:22,166 INFO L87 Difference]: Start difference. First operand 8073 states and 11015 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:22,278 INFO L93 Difference]: Finished difference Result 12109 states and 16457 transitions. [2022-03-19 01:43:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:22,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 01:43:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:22,290 INFO L225 Difference]: With dead ends: 12109 [2022-03-19 01:43:22,290 INFO L226 Difference]: Without dead ends: 8203 [2022-03-19 01:43:22,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:22,300 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:22,300 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 102 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2022-03-19 01:43:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8201. [2022-03-19 01:43:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.3434183237769917) internal successors, (11012), 8197 states have internal predecessors, (11012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11015 transitions. [2022-03-19 01:43:22,438 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11015 transitions. Word has length 30 [2022-03-19 01:43:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:22,438 INFO L478 AbstractCegarLoop]: Abstraction has 8201 states and 11015 transitions. [2022-03-19 01:43:22,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11015 transitions. [2022-03-19 01:43:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 01:43:22,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:22,445 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:22,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-19 01:43:22,445 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1172781707, now seen corresponding path program 1 times [2022-03-19 01:43:22,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:22,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233405225] [2022-03-19 01:43:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:22,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:22,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233405225] [2022-03-19 01:43:22,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233405225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:22,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:22,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:22,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244571343] [2022-03-19 01:43:22,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:22,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:22,471 INFO L87 Difference]: Start difference. First operand 8201 states and 11015 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:22,638 INFO L93 Difference]: Finished difference Result 13837 states and 18825 transitions. [2022-03-19 01:43:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 01:43:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:22,657 INFO L225 Difference]: With dead ends: 13837 [2022-03-19 01:43:22,657 INFO L226 Difference]: Without dead ends: 13835 [2022-03-19 01:43:22,661 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:22,661 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:22,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2022-03-19 01:43:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12297. [2022-03-19 01:43:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12297 states, 12293 states have (on average 1.3018791181973481) internal successors, (16004), 12293 states have internal predecessors, (16004), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12297 states to 12297 states and 16007 transitions. [2022-03-19 01:43:22,845 INFO L78 Accepts]: Start accepts. Automaton has 12297 states and 16007 transitions. Word has length 30 [2022-03-19 01:43:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:22,846 INFO L478 AbstractCegarLoop]: Abstraction has 12297 states and 16007 transitions. [2022-03-19 01:43:22,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 12297 states and 16007 transitions. [2022-03-19 01:43:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 01:43:22,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:22,857 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:22,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-19 01:43:22,857 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1678340332, now seen corresponding path program 1 times [2022-03-19 01:43:22,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:22,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971013367] [2022-03-19 01:43:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:22,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:22,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971013367] [2022-03-19 01:43:22,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971013367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:22,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:22,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:22,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14450443] [2022-03-19 01:43:22,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:22,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:22,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:22,881 INFO L87 Difference]: Start difference. First operand 12297 states and 16007 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:23,105 INFO L93 Difference]: Finished difference Result 27917 states and 36233 transitions. [2022-03-19 01:43:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:23,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 01:43:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:23,128 INFO L225 Difference]: With dead ends: 27917 [2022-03-19 01:43:23,129 INFO L226 Difference]: Without dead ends: 15883 [2022-03-19 01:43:23,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:23,146 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:23,150 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 119 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2022-03-19 01:43:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15881. [2022-03-19 01:43:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15877 states have (on average 1.2740442149020597) internal successors, (20228), 15877 states have internal predecessors, (20228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 20231 transitions. [2022-03-19 01:43:23,454 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 20231 transitions. Word has length 30 [2022-03-19 01:43:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:23,454 INFO L478 AbstractCegarLoop]: Abstraction has 15881 states and 20231 transitions. [2022-03-19 01:43:23,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 20231 transitions. [2022-03-19 01:43:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 01:43:23,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:23,467 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:23,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-19 01:43:23,467 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:23,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1996461521, now seen corresponding path program 1 times [2022-03-19 01:43:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:23,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342410022] [2022-03-19 01:43:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:23,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:23,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342410022] [2022-03-19 01:43:23,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342410022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:23,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:23,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070863393] [2022-03-19 01:43:23,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:23,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:23,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:23,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:23,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:23,492 INFO L87 Difference]: Start difference. First operand 15881 states and 20231 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:23,671 INFO L93 Difference]: Finished difference Result 23821 states and 30217 transitions. [2022-03-19 01:43:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 01:43:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:23,692 INFO L225 Difference]: With dead ends: 23821 [2022-03-19 01:43:23,693 INFO L226 Difference]: Without dead ends: 16139 [2022-03-19 01:43:23,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:23,706 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:23,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2022-03-19 01:43:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16137. [2022-03-19 01:43:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16137 states, 16133 states have (on average 1.2538275584206284) internal successors, (20228), 16133 states have internal predecessors, (20228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 20231 transitions. [2022-03-19 01:43:24,019 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 20231 transitions. Word has length 31 [2022-03-19 01:43:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:24,019 INFO L478 AbstractCegarLoop]: Abstraction has 16137 states and 20231 transitions. [2022-03-19 01:43:24,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 20231 transitions. [2022-03-19 01:43:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 01:43:24,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:24,031 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:24,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-19 01:43:24,031 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash -488909712, now seen corresponding path program 1 times [2022-03-19 01:43:24,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:24,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831143721] [2022-03-19 01:43:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:24,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:24,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831143721] [2022-03-19 01:43:24,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831143721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:24,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:24,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:24,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925163846] [2022-03-19 01:43:24,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:24,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:24,050 INFO L87 Difference]: Start difference. First operand 16137 states and 20231 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:24,326 INFO L93 Difference]: Finished difference Result 26637 states and 33545 transitions. [2022-03-19 01:43:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 01:43:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:24,363 INFO L225 Difference]: With dead ends: 26637 [2022-03-19 01:43:24,363 INFO L226 Difference]: Without dead ends: 26635 [2022-03-19 01:43:24,367 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:24,368 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 122 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:24,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 75 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26635 states. [2022-03-19 01:43:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26635 to 24585. [2022-03-19 01:43:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24585 states, 24581 states have (on average 1.2186648224238232) internal successors, (29956), 24581 states have internal predecessors, (29956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24585 states to 24585 states and 29959 transitions. [2022-03-19 01:43:24,748 INFO L78 Accepts]: Start accepts. Automaton has 24585 states and 29959 transitions. Word has length 31 [2022-03-19 01:43:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:24,748 INFO L478 AbstractCegarLoop]: Abstraction has 24585 states and 29959 transitions. [2022-03-19 01:43:24,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 24585 states and 29959 transitions. [2022-03-19 01:43:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 01:43:24,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:24,773 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:24,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-19 01:43:24,773 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash -994468337, now seen corresponding path program 1 times [2022-03-19 01:43:24,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:24,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049674115] [2022-03-19 01:43:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:24,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:24,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:24,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:24,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049674115] [2022-03-19 01:43:24,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049674115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:24,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:24,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:24,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629430504] [2022-03-19 01:43:24,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:24,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:24,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:24,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:24,793 INFO L87 Difference]: Start difference. First operand 24585 states and 29959 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:25,173 INFO L93 Difference]: Finished difference Result 55309 states and 66825 transitions. [2022-03-19 01:43:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:25,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 01:43:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:25,215 INFO L225 Difference]: With dead ends: 55309 [2022-03-19 01:43:25,216 INFO L226 Difference]: Without dead ends: 31243 [2022-03-19 01:43:25,241 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:25,242 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:25,242 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 121 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2022-03-19 01:43:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31241. [2022-03-19 01:43:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31241 states, 31237 states have (on average 1.1802669910682844) internal successors, (36868), 31237 states have internal predecessors, (36868), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31241 states to 31241 states and 36871 transitions. [2022-03-19 01:43:25,783 INFO L78 Accepts]: Start accepts. Automaton has 31241 states and 36871 transitions. Word has length 31 [2022-03-19 01:43:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:25,783 INFO L478 AbstractCegarLoop]: Abstraction has 31241 states and 36871 transitions. [2022-03-19 01:43:25,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 31241 states and 36871 transitions. [2022-03-19 01:43:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 01:43:25,798 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:25,798 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:25,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-19 01:43:25,798 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2023701264, now seen corresponding path program 1 times [2022-03-19 01:43:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:25,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258920153] [2022-03-19 01:43:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:25,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:25,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:25,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:25,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258920153] [2022-03-19 01:43:25,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258920153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:25,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:25,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:25,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251269588] [2022-03-19 01:43:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:25,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:25,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:25,817 INFO L87 Difference]: Start difference. First operand 31241 states and 36871 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:26,199 INFO L93 Difference]: Finished difference Result 46861 states and 55049 transitions. [2022-03-19 01:43:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 01:43:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:26,245 INFO L225 Difference]: With dead ends: 46861 [2022-03-19 01:43:26,245 INFO L226 Difference]: Without dead ends: 31755 [2022-03-19 01:43:26,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:26,261 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 135 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:26,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 96 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31755 states. [2022-03-19 01:43:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31755 to 31753. [2022-03-19 01:43:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31753 states, 31749 states have (on average 1.1612334246747928) internal successors, (36868), 31749 states have internal predecessors, (36868), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31753 states to 31753 states and 36871 transitions. [2022-03-19 01:43:26,710 INFO L78 Accepts]: Start accepts. Automaton has 31753 states and 36871 transitions. Word has length 32 [2022-03-19 01:43:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:26,710 INFO L478 AbstractCegarLoop]: Abstraction has 31753 states and 36871 transitions. [2022-03-19 01:43:26,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 31753 states and 36871 transitions. [2022-03-19 01:43:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 01:43:26,726 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:26,726 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:26,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-19 01:43:26,726 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash -763714223, now seen corresponding path program 1 times [2022-03-19 01:43:26,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:26,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927674876] [2022-03-19 01:43:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:26,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:26,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:26,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927674876] [2022-03-19 01:43:26,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927674876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:26,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:26,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:26,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566958784] [2022-03-19 01:43:26,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:26,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:26,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:26,747 INFO L87 Difference]: Start difference. First operand 31753 states and 36871 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:27,253 INFO L93 Difference]: Finished difference Result 51211 states and 58888 transitions. [2022-03-19 01:43:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:27,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 01:43:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:27,324 INFO L225 Difference]: With dead ends: 51211 [2022-03-19 01:43:27,324 INFO L226 Difference]: Without dead ends: 51209 [2022-03-19 01:43:27,334 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:27,335 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:43:27,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 73 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:43:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51209 states. [2022-03-19 01:43:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51209 to 49161. [2022-03-19 01:43:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49161 states, 49157 states have (on average 1.13538254978945) internal successors, (55812), 49157 states have internal predecessors, (55812), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49161 states to 49161 states and 55815 transitions. [2022-03-19 01:43:28,135 INFO L78 Accepts]: Start accepts. Automaton has 49161 states and 55815 transitions. Word has length 32 [2022-03-19 01:43:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:28,135 INFO L478 AbstractCegarLoop]: Abstraction has 49161 states and 55815 transitions. [2022-03-19 01:43:28,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 49161 states and 55815 transitions. [2022-03-19 01:43:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 01:43:28,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:43:28,166 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 01:43:28,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-19 01:43:28,167 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:43:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:43:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1269272848, now seen corresponding path program 1 times [2022-03-19 01:43:28,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:43:28,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702243450] [2022-03-19 01:43:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:43:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:43:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:43:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:43:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:43:28,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:43:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702243450] [2022-03-19 01:43:28,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702243450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:43:28,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:43:28,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 01:43:28,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973046649] [2022-03-19 01:43:28,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:43:28,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 01:43:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:43:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 01:43:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 01:43:28,187 INFO L87 Difference]: Start difference. First operand 49161 states and 55815 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:43:29,046 INFO L93 Difference]: Finished difference Result 109577 states and 122375 transitions. [2022-03-19 01:43:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 01:43:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 01:43:29,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:43:29,047 INFO L225 Difference]: With dead ends: 109577 [2022-03-19 01:43:29,047 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 01:43:29,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:43:29,105 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 122 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 [2022-03-19 01:43:29,105 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 122 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:43:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 01:43:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 01:43:29,106 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) [2022-03-19 01:43:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 01:43:29,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2022-03-19 01:43:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:43:29,106 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 01:43:29,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 01:43:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 01:43:29,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 01:43:29,108 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 01:43:29,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-19 01:43:29,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 01:54:18,755 WARN L232 SmtUtils]: Spent 10.83m on a formula simplification that was a NOOP. DAG size: 8252 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 01:54:18,893 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|)) [2022-03-19 01:54:18,893 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-19 01:54:18,893 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-19 01:54:18,893 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 01:54:18,893 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 01:54:18,893 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-19 01:54:18,893 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-19 01:54:18,894 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 6 179) the Hoare annotation is: true [2022-03-19 01:54:18,894 INFO L885 garLoopResultBuilder]: At program point L169-1(lines 44 174) the Hoare annotation is: true [2022-03-19 01:54:18,894 INFO L885 garLoopResultBuilder]: At program point L175(lines 7 179) the Hoare annotation is: true [2022-03-19 01:54:18,894 INFO L882 garLoopResultBuilder]: For program point L46(lines 46 48) no Hoare annotation was computed. [2022-03-19 01:54:18,894 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 6 179) no Hoare annotation was computed. [2022-03-19 01:54:18,894 INFO L882 garLoopResultBuilder]: For program point L73(lines 73 75) no Hoare annotation was computed. [2022-03-19 01:54:18,894 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 6 179) no Hoare annotation was computed. [2022-03-19 01:54:18,894 INFO L882 garLoopResultBuilder]: For program point L73-2(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,894 INFO L882 garLoopResultBuilder]: For program point L77-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,895 INFO L882 garLoopResultBuilder]: For program point L81-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,895 INFO L882 garLoopResultBuilder]: For program point L85-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,895 INFO L882 garLoopResultBuilder]: For program point L89-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,895 INFO L882 garLoopResultBuilder]: For program point L93-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,895 INFO L882 garLoopResultBuilder]: For program point L97-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,895 INFO L882 garLoopResultBuilder]: For program point L101-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,896 INFO L882 garLoopResultBuilder]: For program point L105-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,896 INFO L882 garLoopResultBuilder]: For program point L109-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,896 INFO L882 garLoopResultBuilder]: For program point L113-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,896 INFO L882 garLoopResultBuilder]: For program point L120(line 120) no Hoare annotation was computed. [2022-03-19 01:54:18,896 INFO L882 garLoopResultBuilder]: For program point L119-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,896 INFO L878 garLoopResultBuilder]: At program point L170-1(lines 7 179) the Hoare annotation is: false [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L125(line 125) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L124-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 177) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L130(line 130) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L129-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L135(line 135) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L134-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L140(line 140) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L139-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L145(line 145) no Hoare annotation was computed. [2022-03-19 01:54:18,897 INFO L882 garLoopResultBuilder]: For program point L144-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L150(line 150) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L149-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L155(line 155) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L154-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L160(line 160) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L159-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L165(line 165) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L164-1(lines 44 174) no Hoare annotation was computed. [2022-03-19 01:54:18,898 INFO L882 garLoopResultBuilder]: For program point L170(line 170) no Hoare annotation was computed. [2022-03-19 01:54:18,900 INFO L718 BasicCegarLoop]: Path program histogram: [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] [2022-03-19 01:54:18,901 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 01:54:18,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:54:18 BasicIcfg [2022-03-19 01:54:18,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 01:54:18,909 INFO L158 Benchmark]: Toolchain (without parser) took 661610.80ms. Allocated memory was 202.4MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 152.8MB in the beginning and 3.0GB in the end (delta: -2.8GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-03-19 01:54:18,909 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory is still 168.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 01:54:18,909 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.97ms. Allocated memory is still 202.4MB. Free memory was 152.6MB in the beginning and 178.1MB in the end (delta: -25.5MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. [2022-03-19 01:54:18,911 INFO L158 Benchmark]: Boogie Preprocessor took 54.26ms. Allocated memory is still 202.4MB. Free memory was 178.1MB in the beginning and 176.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 01:54:18,911 INFO L158 Benchmark]: RCFGBuilder took 359.47ms. Allocated memory is still 202.4MB. Free memory was 176.6MB in the beginning and 163.8MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-19 01:54:18,911 INFO L158 Benchmark]: IcfgTransformer took 27.04ms. Allocated memory is still 202.4MB. Free memory was 163.8MB in the beginning and 162.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 01:54:18,914 INFO L158 Benchmark]: TraceAbstraction took 660936.23ms. Allocated memory was 202.4MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 161.7MB in the beginning and 3.0GB in the end (delta: -2.8GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2022-03-19 01:54:18,917 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 202.4MB. Free memory is still 168.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.97ms. Allocated memory is still 202.4MB. Free memory was 152.6MB in the beginning and 178.1MB in the end (delta: -25.5MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 54.26ms. Allocated memory is still 202.4MB. Free memory was 178.1MB in the beginning and 176.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 359.47ms. Allocated memory is still 202.4MB. Free memory was 176.6MB in the beginning and 163.8MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 27.04ms. Allocated memory is still 202.4MB. Free memory was 163.8MB in the beginning and 162.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 660936.23ms. Allocated memory was 202.4MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 161.7MB in the beginning and 3.0GB in the end (delta: -2.8GB). Peak memory consumption was 2.7GB. 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: 177]: 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 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 660.9s, OverallIterations: 31, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 649.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4339 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4339 mSDsluCounter, 3131 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 219 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2036 IncrementalHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 2912 mSDtfsCounter, 2036 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 217 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49161occurred in iteration=30, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 13 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 649.7s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 843 NumberOfCodeBlocks, 843 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 812 ConstructedInterpolants, 0 QuantifiedInterpolants, 1801 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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: 44]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-03-19 01:54:18,955 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...