/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:05:10,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:05:10,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:05:10,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:05:10,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:05:10,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:05:10,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:05:10,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:05:10,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:05:10,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:05:10,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:05:10,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:05:10,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:05:10,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:05:10,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:05:10,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:05:10,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:05:10,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:05:10,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:05:10,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:05:10,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:05:10,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:05:10,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:05:10,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:05:10,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:05:10,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:05:10,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:05:10,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:05:10,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:05:10,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:05:10,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:05:10,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:05:10,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:05:10,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:05:10,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:05:10,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:05:10,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:05:10,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:05:10,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:05:10,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:05:10,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:05:10,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:05:10,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:05:10,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:05:10,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:05:10,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:05:10,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:05:10,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:05:10,763 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:05:10,763 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:05:10,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:05:10,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:05:10,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:05:10,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:05:10,955 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:05:10,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-24 04:05:11,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3059407f3/252121db9d0e489a8257cca49773873b/FLAG55a9d7e61 [2022-02-24 04:05:11,292 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:05:11,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-24 04:05:11,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3059407f3/252121db9d0e489a8257cca49773873b/FLAG55a9d7e61 [2022-02-24 04:05:11,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3059407f3/252121db9d0e489a8257cca49773873b [2022-02-24 04:05:11,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:05:11,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:05:11,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:05:11,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:05:11,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:05:11,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1f0145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11, skipping insertion in model container [2022-02-24 04:05:11,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:05:11,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:05:11,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-02-24 04:05:11,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:05:11,912 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:05:11,919 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-02-24 04:05:11,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:05:11,935 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:05:11,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11 WrapperNode [2022-02-24 04:05:11,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:05:11,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:05:11,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:05:11,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:05:11,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:05:11,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:05:11,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:05:11,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:05:11,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (1/1) ... [2022-02-24 04:05:11,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:05:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:05:11,996 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) [2022-02-24 04:05:12,019 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 [2022-02-24 04:05:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:05:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:05:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 04:05:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:05:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:05:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-02-24 04:05:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-02-24 04:05:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2022-02-24 04:05:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-02-24 04:05:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:05:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-24 04:05:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-24 04:05:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-02-24 04:05:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:05:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:05:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 04:05:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:05:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:05:12,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:05:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:05:12,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:05:12,106 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:05:12,107 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:05:12,273 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:05:12,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:05:12,277 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-02-24 04:05:12,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:05:12 BoogieIcfgContainer [2022-02-24 04:05:12,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:05:12,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:05:12,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:05:12,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:05:12,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:05:11" (1/3) ... [2022-02-24 04:05:12,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f11557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:05:12, skipping insertion in model container [2022-02-24 04:05:12,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:11" (2/3) ... [2022-02-24 04:05:12,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f11557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:05:12, skipping insertion in model container [2022-02-24 04:05:12,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:05:12" (3/3) ... [2022-02-24 04:05:12,283 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-02-24 04:05:12,286 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:05:12,287 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:05:12,317 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:05:12,321 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 04:05:12,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:05:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 04:05:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:05:12,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:12,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:12,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 1 times [2022-02-24 04:05:12,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:12,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85504481] [2022-02-24 04:05:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:12,383 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:05:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 04:05:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:12,608 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:12,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85504481] [2022-02-24 04:05:12,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [85504481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:12,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:12,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:05:12,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181142833] [2022-02-24 04:05:12,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:12,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:05:12,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:05:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:05:12,636 INFO L87 Difference]: Start difference. First operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:12,787 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-24 04:05:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 04:05:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-02-24 04:05:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:12,793 INFO L225 Difference]: With dead ends: 127 [2022-02-24 04:05:12,794 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 04:05:12,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:05:12,798 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 81 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:12,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 04:05:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-02-24 04:05:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 04:05:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-02-24 04:05:12,825 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2022-02-24 04:05:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:12,826 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-02-24 04:05:12,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-02-24 04:05:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:05:12,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:12,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:12,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:05:12,828 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 1 times [2022-02-24 04:05:12,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:12,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587794822] [2022-02-24 04:05:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:12,831 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:05:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 04:05:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:13,024 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:13,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587794822] [2022-02-24 04:05:13,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [587794822] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:13,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:13,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:05:13,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793158294] [2022-02-24 04:05:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:13,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:05:13,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:05:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:05:13,026 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:13,265 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-02-24 04:05:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:05:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-02-24 04:05:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:13,268 INFO L225 Difference]: With dead ends: 81 [2022-02-24 04:05:13,268 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 04:05:13,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:05:13,270 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:13,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 55 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:05:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 04:05:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-02-24 04:05:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 04:05:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-02-24 04:05:13,294 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2022-02-24 04:05:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:13,294 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-02-24 04:05:13,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-02-24 04:05:13,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:05:13,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:13,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:13,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:05:13,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:13,296 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 1 times [2022-02-24 04:05:13,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:13,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068081113] [2022-02-24 04:05:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:13,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:13,298 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 04:05:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 04:05:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-24 04:05:13,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:13,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068081113] [2022-02-24 04:05:13,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2068081113] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:13,666 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:13,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:05:13,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294330490] [2022-02-24 04:05:13,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:13,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:05:13,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:05:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:05:13,667 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-24 04:05:15,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:16,441 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-02-24 04:05:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:05:16,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-02-24 04:05:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:16,443 INFO L225 Difference]: With dead ends: 81 [2022-02-24 04:05:16,443 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 04:05:16,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-02-24 04:05:16,444 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 163 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:16,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 62 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 649 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 04:05:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 04:05:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-02-24 04:05:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.18) internal successors, (59), 51 states have internal predecessors, (59), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-24 04:05:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-02-24 04:05:16,453 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 56 [2022-02-24 04:05:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:16,453 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-02-24 04:05:16,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-24 04:05:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-02-24 04:05:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:05:16,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:16,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:16,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:05:16,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1653895387, now seen corresponding path program 1 times [2022-02-24 04:05:16,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:16,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154403845] [2022-02-24 04:05:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:16,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:16,457 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 04:05:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 04:05:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:16,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:16,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154403845] [2022-02-24 04:05:16,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154403845] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:16,572 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:16,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:05:16,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204961310] [2022-02-24 04:05:16,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:16,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:05:16,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:16,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:05:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:05:16,577 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:18,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:19,010 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-02-24 04:05:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:05:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-02-24 04:05:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:19,012 INFO L225 Difference]: With dead ends: 115 [2022-02-24 04:05:19,012 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 04:05:19,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:05:19,013 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:19,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 52 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 321 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 04:05:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 04:05:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-02-24 04:05:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-24 04:05:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-02-24 04:05:19,026 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 60 [2022-02-24 04:05:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:19,026 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-02-24 04:05:19,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-02-24 04:05:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 04:05:19,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:19,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:19,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:05:19,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 812630909, now seen corresponding path program 2 times [2022-02-24 04:05:19,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:19,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678235679] [2022-02-24 04:05:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:19,029 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 04:05:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:19,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:19,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678235679] [2022-02-24 04:05:19,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678235679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:19,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:19,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:05:19,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976770065] [2022-02-24 04:05:19,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:19,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:05:19,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:05:19,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:05:19,261 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:19,938 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2022-02-24 04:05:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:05:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-02-24 04:05:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:19,940 INFO L225 Difference]: With dead ends: 116 [2022-02-24 04:05:19,940 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 04:05:19,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-24 04:05:19,942 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:19,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 66 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:05:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 04:05:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-02-24 04:05:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.206896551724138) internal successors, (70), 62 states have internal predecessors, (70), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (16), 12 states have call predecessors, (16), 13 states have call successors, (16) [2022-02-24 04:05:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-02-24 04:05:19,952 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 62 [2022-02-24 04:05:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:19,952 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-02-24 04:05:19,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-02-24 04:05:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:05:19,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:19,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:19,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:05:19,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:19,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 1 times [2022-02-24 04:05:19,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:19,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814140742] [2022-02-24 04:05:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:19,955 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 04:05:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 04:05:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 04:05:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:20,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:20,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814140742] [2022-02-24 04:05:20,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814140742] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:20,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:20,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:05:20,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019609824] [2022-02-24 04:05:20,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:20,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:05:20,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:20,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:05:20,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:05:20,094 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:05:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:20,389 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-02-24 04:05:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:05:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-02-24 04:05:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:20,391 INFO L225 Difference]: With dead ends: 106 [2022-02-24 04:05:20,391 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 04:05:20,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:05:20,392 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 92 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:20,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 56 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:05:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 04:05:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-24 04:05:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-02-24 04:05:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-02-24 04:05:20,402 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 64 [2022-02-24 04:05:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:20,402 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-02-24 04:05:20,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:05:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-02-24 04:05:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:05:20,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:20,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:20,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:05:20,403 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:20,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1958796481, now seen corresponding path program 2 times [2022-02-24 04:05:20,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:20,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73653106] [2022-02-24 04:05:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:20,405 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 04:05:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 04:05:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:20,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:20,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73653106] [2022-02-24 04:05:20,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [73653106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:20,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:20,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:05:20,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456483031] [2022-02-24 04:05:20,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:20,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:05:20,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:20,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:05:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:05:20,496 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:05:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:20,794 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2022-02-24 04:05:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:05:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-02-24 04:05:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:20,795 INFO L225 Difference]: With dead ends: 116 [2022-02-24 04:05:20,795 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 04:05:20,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:05:20,796 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:20,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 53 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:05:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 04:05:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2022-02-24 04:05:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 55 states have internal predecessors, (63), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-24 04:05:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-02-24 04:05:20,803 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 66 [2022-02-24 04:05:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:20,804 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-02-24 04:05:20,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:05:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-02-24 04:05:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:05:20,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:20,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:20,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:05:20,805 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:20,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 1 times [2022-02-24 04:05:20,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:20,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453957941] [2022-02-24 04:05:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:20,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:20,806 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 04:05:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:20,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:20,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453957941] [2022-02-24 04:05:20,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453957941] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:20,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:20,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:05:20,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809875493] [2022-02-24 04:05:20,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:05:20,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:05:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:05:20,924 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:22,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:25,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:25,671 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2022-02-24 04:05:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:05:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-02-24 04:05:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:25,672 INFO L225 Difference]: With dead ends: 107 [2022-02-24 04:05:25,672 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 04:05:25,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:05:25,673 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 45 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:25,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 60 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 590 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 04:05:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 04:05:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-02-24 04:05:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-24 04:05:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-02-24 04:05:25,681 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 65 [2022-02-24 04:05:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:25,681 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-02-24 04:05:25,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-02-24 04:05:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:05:25,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:25,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:25,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:05:25,682 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 1 times [2022-02-24 04:05:25,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:25,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894037569] [2022-02-24 04:05:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:25,684 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:26,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 04:05:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-24 04:05:30,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:30,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894037569] [2022-02-24 04:05:30,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [894037569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:30,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:30,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 04:05:30,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47526232] [2022-02-24 04:05:30,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:30,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 04:05:30,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 04:05:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:05:30,281 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-24 04:05:32,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:34,825 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2022-02-24 04:05:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 04:05:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 66 [2022-02-24 04:05:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:34,827 INFO L225 Difference]: With dead ends: 123 [2022-02-24 04:05:34,827 INFO L226 Difference]: Without dead ends: 121 [2022-02-24 04:05:34,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 04:05:34,829 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 190 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:34,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 62 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 991 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-02-24 04:05:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-24 04:05:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2022-02-24 04:05:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (18), 12 states have call predecessors, (18), 13 states have call successors, (18) [2022-02-24 04:05:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-02-24 04:05:34,842 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 66 [2022-02-24 04:05:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:34,842 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-02-24 04:05:34,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-24 04:05:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-02-24 04:05:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:05:34,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:34,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:34,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:05:34,843 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1470293173, now seen corresponding path program 2 times [2022-02-24 04:05:34,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:34,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595113734] [2022-02-24 04:05:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:34,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:34,845 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 04:05:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:34,961 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:34,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595113734] [2022-02-24 04:05:34,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595113734] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:34,961 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:34,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:05:34,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225357863] [2022-02-24 04:05:34,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:34,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:05:34,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:05:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:05:34,962 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:35,413 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2022-02-24 04:05:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:05:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-02-24 04:05:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:35,415 INFO L225 Difference]: With dead ends: 127 [2022-02-24 04:05:35,415 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 04:05:35,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:05:35,416 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:35,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 63 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:05:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 04:05:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-02-24 04:05:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 78 states have internal predecessors, (91), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2022-02-24 04:05:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2022-02-24 04:05:35,432 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 67 [2022-02-24 04:05:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:35,432 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2022-02-24 04:05:35,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2022-02-24 04:05:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:05:35,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:35,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:35,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:05:35,433 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1247511922, now seen corresponding path program 3 times [2022-02-24 04:05:35,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:35,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476398277] [2022-02-24 04:05:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:35,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:35,435 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:05:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 04:05:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:35,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:35,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476398277] [2022-02-24 04:05:35,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [476398277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:35,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:35,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:05:35,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532555675] [2022-02-24 04:05:35,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:35,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:05:35,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:35,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:05:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:05:35,597 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:36,231 INFO L93 Difference]: Finished difference Result 169 states and 215 transitions. [2022-02-24 04:05:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:05:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-02-24 04:05:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:36,233 INFO L225 Difference]: With dead ends: 169 [2022-02-24 04:05:36,233 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 04:05:36,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:05:36,234 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 110 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:36,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:05:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 04:05:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2022-02-24 04:05:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.2625) internal successors, (101), 85 states have internal predecessors, (101), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-02-24 04:05:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2022-02-24 04:05:36,259 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 68 [2022-02-24 04:05:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:36,259 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2022-02-24 04:05:36,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2022-02-24 04:05:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:05:36,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:36,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:36,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:05:36,261 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash -677053431, now seen corresponding path program 4 times [2022-02-24 04:05:36,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:36,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514594153] [2022-02-24 04:05:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:36,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:36,264 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:05:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 04:05:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:36,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:36,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514594153] [2022-02-24 04:05:36,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [514594153] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:36,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:36,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:05:36,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536380947] [2022-02-24 04:05:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:36,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:05:36,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:05:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:05:36,381 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:36,870 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2022-02-24 04:05:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:05:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-02-24 04:05:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:36,871 INFO L225 Difference]: With dead ends: 175 [2022-02-24 04:05:36,871 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 04:05:36,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:05:36,872 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:36,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 63 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:05:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 04:05:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-02-24 04:05:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 93 states have internal predecessors, (113), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-02-24 04:05:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2022-02-24 04:05:36,888 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 69 [2022-02-24 04:05:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:36,888 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2022-02-24 04:05:36,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:05:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2022-02-24 04:05:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 04:05:36,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:36,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:36,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:05:36,889 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:36,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1405616165, now seen corresponding path program 5 times [2022-02-24 04:05:36,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:36,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622193688] [2022-02-24 04:05:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:36,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:36,891 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:36,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 04:05:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:37,024 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:37,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622193688] [2022-02-24 04:05:37,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [622193688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:37,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:37,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:05:37,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095550729] [2022-02-24 04:05:37,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:37,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:05:37,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:05:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:05:37,025 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:37,502 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-02-24 04:05:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:05:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-02-24 04:05:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:37,503 INFO L225 Difference]: With dead ends: 143 [2022-02-24 04:05:37,503 INFO L226 Difference]: Without dead ends: 123 [2022-02-24 04:05:37,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:05:37,504 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:37,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 61 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:05:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-24 04:05:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2022-02-24 04:05:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 78 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-24 04:05:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-02-24 04:05:37,518 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 70 [2022-02-24 04:05:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:37,520 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-02-24 04:05:37,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-02-24 04:05:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:05:37,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:37,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:37,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:05:37,522 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash 875388352, now seen corresponding path program 1 times [2022-02-24 04:05:37,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:37,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812133985] [2022-02-24 04:05:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:37,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:37,524 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 04:05:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 04:05:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:37,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:37,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812133985] [2022-02-24 04:05:37,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812133985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:37,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:37,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 04:05:37,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926922389] [2022-02-24 04:05:37,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:37,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 04:05:37,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 04:05:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:05:37,571 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:05:39,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:39,828 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2022-02-24 04:05:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:05:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2022-02-24 04:05:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:39,829 INFO L225 Difference]: With dead ends: 162 [2022-02-24 04:05:39,829 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 04:05:39,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:05:39,829 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:39,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 105 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 04:05:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 04:05:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-24 04:05:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-24 04:05:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-02-24 04:05:39,842 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 73 [2022-02-24 04:05:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:39,843 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-02-24 04:05:39,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:05:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-02-24 04:05:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 04:05:39,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:39,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:39,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:05:39,843 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash -495926943, now seen corresponding path program 1 times [2022-02-24 04:05:39,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:39,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874147553] [2022-02-24 04:05:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:39,845 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:05:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 04:05:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:39,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 04:05:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:40,000 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:40,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874147553] [2022-02-24 04:05:40,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874147553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:40,000 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:40,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:05:40,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528058711] [2022-02-24 04:05:40,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:40,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:05:40,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:05:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:05:40,001 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:05:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:40,500 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-02-24 04:05:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:05:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2022-02-24 04:05:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:40,502 INFO L225 Difference]: With dead ends: 185 [2022-02-24 04:05:40,502 INFO L226 Difference]: Without dead ends: 123 [2022-02-24 04:05:40,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:05:40,503 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:40,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 64 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:05:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-24 04:05:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-02-24 04:05:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.206896551724138) internal successors, (105), 90 states have internal predecessors, (105), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-02-24 04:05:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2022-02-24 04:05:40,518 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 74 [2022-02-24 04:05:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:40,519 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2022-02-24 04:05:40,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:05:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2022-02-24 04:05:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:05:40,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:40,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:40,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:05:40,520 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1541127366, now seen corresponding path program 6 times [2022-02-24 04:05:40,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:40,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991705723] [2022-02-24 04:05:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:40,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:40,522 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:05:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 04:05:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:05:40,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:40,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991705723] [2022-02-24 04:05:40,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991705723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:40,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:40,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:05:40,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123832760] [2022-02-24 04:05:40,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:40,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:05:40,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:05:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:05:40,714 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:42,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:43,373 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-02-24 04:05:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:05:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2022-02-24 04:05:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:43,374 INFO L225 Difference]: With dead ends: 180 [2022-02-24 04:05:43,374 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 04:05:43,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:05:43,375 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 87 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:43,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 64 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 682 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 04:05:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 04:05:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 132. [2022-02-24 04:05:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 104 states have internal predecessors, (122), 19 states have call successors, (19), 11 states have call predecessors, (19), 13 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-02-24 04:05:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2022-02-24 04:05:43,393 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 73 [2022-02-24 04:05:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:43,394 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2022-02-24 04:05:43,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:05:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2022-02-24 04:05:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 04:05:43,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:43,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:43,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:05:43,395 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:43,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1213658525, now seen corresponding path program 1 times [2022-02-24 04:05:43,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:43,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105329905] [2022-02-24 04:05:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:43,396 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:43,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:43,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:05:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:44,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-24 04:05:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 04:05:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:44,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 04:05:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:44,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 04:05:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:45,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 04:05:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-24 04:05:45,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:45,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105329905] [2022-02-24 04:05:45,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [105329905] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:45,299 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:45,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 04:05:45,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547474979] [2022-02-24 04:05:45,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:45,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 04:05:45,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 04:05:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 04:05:45,300 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand has 35 states, 30 states have (on average 1.7) internal successors, (51), 28 states have internal predecessors, (51), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-24 04:05:47,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:05:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:50,464 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2022-02-24 04:05:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 04:05:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.7) internal successors, (51), 28 states have internal predecessors, (51), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 75 [2022-02-24 04:05:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:50,466 INFO L225 Difference]: With dead ends: 164 [2022-02-24 04:05:50,466 INFO L226 Difference]: Without dead ends: 162 [2022-02-24 04:05:50,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=394, Invalid=4298, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 04:05:50,467 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 149 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:50,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 67 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1747 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 04:05:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-24 04:05:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2022-02-24 04:05:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 112 states have internal predecessors, (130), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 18 states have call predecessors, (23), 18 states have call successors, (23) [2022-02-24 04:05:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2022-02-24 04:05:50,493 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 75 [2022-02-24 04:05:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:50,493 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2022-02-24 04:05:50,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.7) internal successors, (51), 28 states have internal predecessors, (51), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-24 04:05:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2022-02-24 04:05:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 04:05:50,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:50,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:50,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:05:50,494 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1496849804, now seen corresponding path program 7 times [2022-02-24 04:05:50,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:50,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12290042] [2022-02-24 04:05:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:50,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:50,496 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:51,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:51,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:05:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:52,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:05:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:52,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:52,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:05:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:53,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 04:05:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-24 04:06:15,186 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:15,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12290042] [2022-02-24 04:06:15,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [12290042] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:15,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:15,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 04:06:15,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734989578] [2022-02-24 04:06:15,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:15,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 04:06:15,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 04:06:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 04:06:15,187 INFO L87 Difference]: Start difference. First operand 144 states and 175 transitions. Second operand has 37 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-24 04:06:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:22,405 INFO L93 Difference]: Finished difference Result 200 states and 255 transitions. [2022-02-24 04:06:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 04:06:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 76 [2022-02-24 04:06:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:22,407 INFO L225 Difference]: With dead ends: 200 [2022-02-24 04:06:22,407 INFO L226 Difference]: Without dead ends: 198 [2022-02-24 04:06:22,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=409, Invalid=4703, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 04:06:22,408 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:22,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 71 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 04:06:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-24 04:06:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 169. [2022-02-24 04:06:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.236220472440945) internal successors, (157), 134 states have internal predecessors, (157), 25 states have call successors, (25), 14 states have call predecessors, (25), 16 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2022-02-24 04:06:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 215 transitions. [2022-02-24 04:06:22,445 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 215 transitions. Word has length 76 [2022-02-24 04:06:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:22,445 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 215 transitions. [2022-02-24 04:06:22,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-24 04:06:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 215 transitions. [2022-02-24 04:06:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:06:22,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:22,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:22,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:06:22,447 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1239460651, now seen corresponding path program 8 times [2022-02-24 04:06:22,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:22,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354362166] [2022-02-24 04:06:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:22,449 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:06:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 04:06:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:22,605 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:22,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354362166] [2022-02-24 04:06:22,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [354362166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:22,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:22,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:06:22,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724423880] [2022-02-24 04:06:22,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:22,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:06:22,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:22,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:06:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:06:22,606 INFO L87 Difference]: Start difference. First operand 169 states and 215 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:06:24,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:06:26,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:06:28,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:06:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:29,504 INFO L93 Difference]: Finished difference Result 196 states and 251 transitions. [2022-02-24 04:06:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:06:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-02-24 04:06:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:29,506 INFO L225 Difference]: With dead ends: 196 [2022-02-24 04:06:29,506 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 04:06:29,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-24 04:06:29,507 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 95 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:29,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 67 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 699 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-02-24 04:06:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 04:06:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-02-24 04:06:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 143 states have internal predecessors, (168), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2022-02-24 04:06:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 231 transitions. [2022-02-24 04:06:29,546 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 231 transitions. Word has length 77 [2022-02-24 04:06:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:29,546 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 231 transitions. [2022-02-24 04:06:29,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:06:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 231 transitions. [2022-02-24 04:06:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:06:29,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:29,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:29,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:06:29,548 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1092715177, now seen corresponding path program 9 times [2022-02-24 04:06:29,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:29,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425501964] [2022-02-24 04:06:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:29,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:29,549 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:06:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 04:06:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:29,669 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:29,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425501964] [2022-02-24 04:06:29,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [425501964] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:29,669 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:29,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:06:29,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551147675] [2022-02-24 04:06:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:29,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:06:29,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:06:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:06:29,670 INFO L87 Difference]: Start difference. First operand 179 states and 231 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-24 04:06:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:30,046 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2022-02-24 04:06:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:06:30,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 77 [2022-02-24 04:06:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:30,047 INFO L225 Difference]: With dead ends: 204 [2022-02-24 04:06:30,047 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 04:06:30,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:06:30,049 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:30,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:06:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 04:06:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-02-24 04:06:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 136 states have internal predecessors, (158), 26 states have call successors, (26), 14 states have call predecessors, (26), 16 states have return successors, (34), 21 states have call predecessors, (34), 21 states have call successors, (34) [2022-02-24 04:06:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 218 transitions. [2022-02-24 04:06:30,084 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 218 transitions. Word has length 77 [2022-02-24 04:06:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:30,085 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 218 transitions. [2022-02-24 04:06:30,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-24 04:06:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 218 transitions. [2022-02-24 04:06:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:06:30,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:30,086 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:30,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:06:30,086 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash 873001991, now seen corresponding path program 10 times [2022-02-24 04:06:30,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:30,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126181276] [2022-02-24 04:06:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:30,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:30,089 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:06:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-24 04:06:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:30,248 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:30,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126181276] [2022-02-24 04:06:30,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [126181276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:30,248 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:30,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:06:30,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656165113] [2022-02-24 04:06:30,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:30,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:06:30,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:06:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:06:30,249 INFO L87 Difference]: Start difference. First operand 172 states and 218 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:30,921 INFO L93 Difference]: Finished difference Result 252 states and 318 transitions. [2022-02-24 04:06:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:06:30,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 77 [2022-02-24 04:06:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:30,923 INFO L225 Difference]: With dead ends: 252 [2022-02-24 04:06:30,923 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 04:06:30,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-02-24 04:06:30,924 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 104 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:30,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 62 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:06:30,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 04:06:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-02-24 04:06:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 146 states have internal predecessors, (169), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (35), 21 states have call predecessors, (35), 21 states have call successors, (35) [2022-02-24 04:06:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 230 transitions. [2022-02-24 04:06:30,961 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 230 transitions. Word has length 77 [2022-02-24 04:06:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:30,961 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 230 transitions. [2022-02-24 04:06:30,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 230 transitions. [2022-02-24 04:06:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 04:06:30,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:30,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:30,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:06:30,962 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1297400883, now seen corresponding path program 2 times [2022-02-24 04:06:30,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:30,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129745386] [2022-02-24 04:06:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:30,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:30,965 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:06:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-24 04:06:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 04:06:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 04:06:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 04:06:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-24 04:06:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:31,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:31,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129745386] [2022-02-24 04:06:31,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [129745386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:31,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:31,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 04:06:31,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046475636] [2022-02-24 04:06:31,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:31,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 04:06:31,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:31,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 04:06:31,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:06:31,261 INFO L87 Difference]: Start difference. First operand 182 states and 230 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:06:33,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:06:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:34,131 INFO L93 Difference]: Finished difference Result 222 states and 277 transitions. [2022-02-24 04:06:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:06:34,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2022-02-24 04:06:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:34,134 INFO L225 Difference]: With dead ends: 222 [2022-02-24 04:06:34,134 INFO L226 Difference]: Without dead ends: 204 [2022-02-24 04:06:34,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-02-24 04:06:34,135 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 116 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:34,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 70 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 917 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 04:06:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-24 04:06:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2022-02-24 04:06:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 146 states have internal predecessors, (169), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (33), 21 states have call predecessors, (33), 21 states have call successors, (33) [2022-02-24 04:06:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 228 transitions. [2022-02-24 04:06:34,171 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 228 transitions. Word has length 78 [2022-02-24 04:06:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:34,171 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 228 transitions. [2022-02-24 04:06:34,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-24 04:06:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 228 transitions. [2022-02-24 04:06:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 04:06:34,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:34,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:34,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:06:34,172 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2052199378, now seen corresponding path program 11 times [2022-02-24 04:06:34,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:34,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71299131] [2022-02-24 04:06:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:34,174 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:06:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 04:06:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:34,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:34,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71299131] [2022-02-24 04:06:34,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [71299131] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:34,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:34,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:06:34,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179749932] [2022-02-24 04:06:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:34,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:06:34,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:06:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:06:34,313 INFO L87 Difference]: Start difference. First operand 182 states and 228 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:06:36,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:06:38,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:06:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:39,142 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-02-24 04:06:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 04:06:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2022-02-24 04:06:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:39,144 INFO L225 Difference]: With dead ends: 199 [2022-02-24 04:06:39,144 INFO L226 Difference]: Without dead ends: 187 [2022-02-24 04:06:39,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-02-24 04:06:39,145 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:39,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 822 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 04:06:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-24 04:06:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-02-24 04:06:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 146 states have internal predecessors, (169), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2022-02-24 04:06:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-02-24 04:06:39,181 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 78 [2022-02-24 04:06:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:39,181 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-02-24 04:06:39,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:06:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-02-24 04:06:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:06:39,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:39,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:39,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:06:39,182 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1971107334, now seen corresponding path program 12 times [2022-02-24 04:06:39,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:39,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868951409] [2022-02-24 04:06:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:39,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:39,184 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:06:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 04:06:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:39,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:39,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868951409] [2022-02-24 04:06:39,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868951409] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:39,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:39,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:06:39,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729516703] [2022-02-24 04:06:39,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:39,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:06:39,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:06:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:06:39,480 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:40,484 INFO L93 Difference]: Finished difference Result 251 states and 312 transitions. [2022-02-24 04:06:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 04:06:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2022-02-24 04:06:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:40,486 INFO L225 Difference]: With dead ends: 251 [2022-02-24 04:06:40,486 INFO L226 Difference]: Without dead ends: 239 [2022-02-24 04:06:40,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 04:06:40,487 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 128 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:40,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 75 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:06:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-24 04:06:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2022-02-24 04:06:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 164 states have internal predecessors, (190), 27 states have call successors, (27), 14 states have call predecessors, (27), 19 states have return successors, (33), 22 states have call predecessors, (33), 22 states have call successors, (33) [2022-02-24 04:06:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2022-02-24 04:06:40,534 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 79 [2022-02-24 04:06:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:40,534 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2022-02-24 04:06:40,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2022-02-24 04:06:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:06:40,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:40,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:40,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:06:40,535 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1406881591, now seen corresponding path program 13 times [2022-02-24 04:06:40,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:40,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302883507] [2022-02-24 04:06:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:40,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:40,537 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:06:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 04:06:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:40,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:40,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302883507] [2022-02-24 04:06:40,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [302883507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:40,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:40,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:06:40,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523660405] [2022-02-24 04:06:40,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:40,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:06:40,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:06:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:06:40,870 INFO L87 Difference]: Start difference. First operand 201 states and 250 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 17 states have internal predecessors, (53), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:42,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 04:06:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:43,860 INFO L93 Difference]: Finished difference Result 253 states and 314 transitions. [2022-02-24 04:06:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 04:06:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 17 states have internal predecessors, (53), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2022-02-24 04:06:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:43,861 INFO L225 Difference]: With dead ends: 253 [2022-02-24 04:06:43,861 INFO L226 Difference]: Without dead ends: 241 [2022-02-24 04:06:43,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 04:06:43,862 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 114 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:43,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 75 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1279 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 04:06:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-24 04:06:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 201. [2022-02-24 04:06:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 164 states have internal predecessors, (190), 27 states have call successors, (27), 14 states have call predecessors, (27), 19 states have return successors, (33), 22 states have call predecessors, (33), 22 states have call successors, (33) [2022-02-24 04:06:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2022-02-24 04:06:43,907 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 79 [2022-02-24 04:06:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:43,907 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2022-02-24 04:06:43,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 17 states have internal predecessors, (53), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2022-02-24 04:06:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 04:06:43,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:43,908 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:43,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:06:43,908 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1520136901, now seen corresponding path program 14 times [2022-02-24 04:06:43,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:43,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116404208] [2022-02-24 04:06:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:43,913 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:43,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:43,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:43,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:43,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:43,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:06:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:44,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 04:06:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-24 04:06:44,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:44,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116404208] [2022-02-24 04:06:44,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116404208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:44,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:44,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:06:44,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265736219] [2022-02-24 04:06:44,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:44,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:06:44,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:06:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:06:44,085 INFO L87 Difference]: Start difference. First operand 201 states and 250 transitions. Second operand has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:44,816 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2022-02-24 04:06:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 04:06:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 80 [2022-02-24 04:06:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:44,818 INFO L225 Difference]: With dead ends: 288 [2022-02-24 04:06:44,818 INFO L226 Difference]: Without dead ends: 213 [2022-02-24 04:06:44,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 04:06:44,819 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:44,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 66 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:06:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-24 04:06:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 191. [2022-02-24 04:06:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 154 states have internal predecessors, (178), 27 states have call successors, (27), 14 states have call predecessors, (27), 18 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2022-02-24 04:06:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2022-02-24 04:06:44,863 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 80 [2022-02-24 04:06:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:44,863 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2022-02-24 04:06:44,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-24 04:06:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2022-02-24 04:06:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 04:06:44,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:44,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:44,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:06:44,864 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1163958224, now seen corresponding path program 15 times [2022-02-24 04:06:44,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:44,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723297466] [2022-02-24 04:06:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:44,867 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:06:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:48,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:06:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:48,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:06:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:48,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:06:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:49,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:06:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:06:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:49,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:06:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:50,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 04:06:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat