/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:47:56,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:47:56,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:47:56,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:47:56,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 01:47:56,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 01:47:56,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 01:47:56,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 01:47:56,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 01:47:56,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 01:47:56,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 01:47:56,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 01:47:56,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 01:47:56,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 01:47:57,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 01:47:57,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 01:47:57,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 01:47:57,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:47:57,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:47:57,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:47:57,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:47:57,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:47:57,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:47:57,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:47:57,029 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:47:57,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:47:57,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:47:57,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:47:57,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:47:57,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:47:57,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:47:57,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:47:57,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:47:57,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:47:57,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:47:57,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:47:57,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:47:57,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:47:57,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:47:57,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:47:57,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:47:57,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:47:57,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:47:57,031 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:47:57,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:47:57,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:47:57,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:47:57,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:47:57,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:47:57,199 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:47:57,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-24 01:47:57,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f9758d1/6a8b8aa9ffd247f7bbcf0fcabaa09e24/FLAG0e28dbcb6 [2022-02-24 01:47:57,590 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:47:57,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-24 01:47:57,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f9758d1/6a8b8aa9ffd247f7bbcf0fcabaa09e24/FLAG0e28dbcb6 [2022-02-24 01:47:58,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f9758d1/6a8b8aa9ffd247f7bbcf0fcabaa09e24 [2022-02-24 01:47:58,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:47:58,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:47:58,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:47:58,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:47:58,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:47:58,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb63d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58, skipping insertion in model container [2022-02-24 01:47:58,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:47:58,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:47:58,161 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 01:47:58,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:47:58,189 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:47:58,196 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 01:47:58,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:47:58,212 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:47:58,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58 WrapperNode [2022-02-24 01:47:58,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:47:58,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:47:58,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:47:58,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:47:58,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:47:58,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:47:58,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:47:58,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:47:58,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (1/1) ... [2022-02-24 01:47:58,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:47:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:47:58,275 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 01:47:58,299 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 01:47:58,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:47:58,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:47:58,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 01:47:58,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:47:58,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:47:58,309 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-02-24 01:47:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-02-24 01:47:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2022-02-24 01:47:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-02-24 01:47:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:47:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-24 01:47:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-24 01:47:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-02-24 01:47:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:47:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:47:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 01:47:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:47:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:47:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:47:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:47:58,365 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:47:58,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:47:58,568 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:47:58,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:47:58,572 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-02-24 01:47:58,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:47:58 BoogieIcfgContainer [2022-02-24 01:47:58,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:47:58,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:47:58,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:47:58,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:47:58,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:47:58" (1/3) ... [2022-02-24 01:47:58,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ccfb27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:47:58, skipping insertion in model container [2022-02-24 01:47:58,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:47:58" (2/3) ... [2022-02-24 01:47:58,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ccfb27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:47:58, skipping insertion in model container [2022-02-24 01:47:58,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:47:58" (3/3) ... [2022-02-24 01:47:58,582 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-02-24 01:47:58,586 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:47:58,586 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:47:58,616 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:47:58,621 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=JORDAN [2022-02-24 01:47:58,621 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:47:58,630 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 01:47:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:47:58,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:58,637 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 01:47:58,637 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 1 times [2022-02-24 01:47:58,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:58,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863029844] [2022-02-24 01:47:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:58,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:58,686 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:47:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:47:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:47:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:47:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:47:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:47:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:47:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:47:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:58,857 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 01:47:58,858 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:58,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863029844] [2022-02-24 01:47:58,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863029844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:58,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:58,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:47:58,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186983464] [2022-02-24 01:47:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:58,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:47:58,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:47:58,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:47:58,888 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 01:47:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:59,047 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-24 01:47:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:47:59,050 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 01:47:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:59,058 INFO L225 Difference]: With dead ends: 127 [2022-02-24 01:47:59,059 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 01:47:59,061 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 01:47:59,063 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 01:47:59,064 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 01:47:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 01:47:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-02-24 01:47:59,100 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 01:47:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-02-24 01:47:59,104 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2022-02-24 01:47:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:59,104 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-02-24 01:47:59,104 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 01:47:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-02-24 01:47:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:47:59,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:59,107 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 01:47:59,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:47:59,108 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 1 times [2022-02-24 01:47:59,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:59,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962937959] [2022-02-24 01:47:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:59,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:59,114 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:47:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:47:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:47:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:47:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:47:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:47:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:47:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:47:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,331 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 01:47:59,331 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:59,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962937959] [2022-02-24 01:47:59,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [962937959] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:59,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:59,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:47:59,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837367963] [2022-02-24 01:47:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:59,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:47:59,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:47:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:47:59,333 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 01:47:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:59,573 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-02-24 01:47:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:47:59,574 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 01:47:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:59,575 INFO L225 Difference]: With dead ends: 81 [2022-02-24 01:47:59,575 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 01:47:59,576 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 01:47:59,576 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 01:47:59,577 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 01:47:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 01:47:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-02-24 01:47:59,584 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 01:47:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-02-24 01:47:59,585 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2022-02-24 01:47:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:59,586 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-02-24 01:47:59,586 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 01:47:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-02-24 01:47:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:47:59,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:59,587 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 01:47:59,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:47:59,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 1 times [2022-02-24 01:47:59,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:59,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240204604] [2022-02-24 01:47:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:59,590 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:47:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:47:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:47:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:47:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:47:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:47:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:47:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 01:47:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:59,856 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 01:47:59,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:59,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240204604] [2022-02-24 01:47:59,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240204604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:59,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:59,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:47:59,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395594199] [2022-02-24 01:47:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:59,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:47:59,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:47:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:47:59,858 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 01:48:01,946 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 01:48:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:02,681 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-02-24 01:48:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:48:02,681 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 01:48:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:02,682 INFO L225 Difference]: With dead ends: 81 [2022-02-24 01:48:02,682 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 01:48:02,683 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 01:48:02,684 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 01:48:02,684 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 01:48:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 01:48:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-02-24 01:48:02,691 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 01:48:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-02-24 01:48:02,692 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 56 [2022-02-24 01:48:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:02,692 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-02-24 01:48:02,693 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 01:48:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-02-24 01:48:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:48:02,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:02,694 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 01:48:02,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:48:02,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1653895387, now seen corresponding path program 1 times [2022-02-24 01:48:02,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:02,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749460874] [2022-02-24 01:48:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:02,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:02,696 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:48:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:48:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:02,829 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 01:48:02,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:02,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749460874] [2022-02-24 01:48:02,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [749460874] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:02,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:02,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:48:02,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316216905] [2022-02-24 01:48:02,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:02,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:48:02,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:48:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:48:02,851 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 01:48:04,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:48:07,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:48:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:07,507 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-02-24 01:48:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:48:07,508 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 01:48:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:07,509 INFO L225 Difference]: With dead ends: 115 [2022-02-24 01:48:07,509 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 01:48:07,509 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 01:48:07,510 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:07,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 52 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 320 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 01:48:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 01:48:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-02-24 01:48:07,518 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 01:48:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-02-24 01:48:07,519 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 60 [2022-02-24 01:48:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:07,519 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-02-24 01:48:07,519 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 01:48:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-02-24 01:48:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:48:07,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:07,520 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 01:48:07,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:48:07,520 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash 812630909, now seen corresponding path program 2 times [2022-02-24 01:48:07,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:07,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640306795] [2022-02-24 01:48:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:07,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:07,522 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:48:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:07,735 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 01:48:07,735 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:07,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640306795] [2022-02-24 01:48:07,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [640306795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:07,735 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:07,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:48:07,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491260904] [2022-02-24 01:48:07,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:07,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:48:07,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:48:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:48:07,737 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 01:48:09,818 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 01:48:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:10,680 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2022-02-24 01:48:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:48:10,680 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 01:48:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:10,681 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:48:10,681 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 01:48:10,682 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 01:48:10,683 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:10,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 66 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 805 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 01:48:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 01:48:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-02-24 01:48:10,692 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 01:48:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-02-24 01:48:10,693 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 62 [2022-02-24 01:48:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:10,693 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-02-24 01:48:10,693 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 01:48:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-02-24 01:48:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:48:10,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:10,694 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 01:48:10,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:48:10,694 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 1 times [2022-02-24 01:48:10,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:10,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589484104] [2022-02-24 01:48:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:10,696 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:48:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 01:48:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 01:48:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:10,816 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 01:48:10,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:10,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589484104] [2022-02-24 01:48:10,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589484104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:10,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:10,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:48:10,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29804169] [2022-02-24 01:48:10,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:10,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:48:10,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:48:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:48:10,817 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 01:48:12,878 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 01:48:15,012 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 01:48:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:15,519 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-02-24 01:48:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:48:15,519 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 01:48:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:15,520 INFO L225 Difference]: With dead ends: 106 [2022-02-24 01:48:15,521 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 01:48:15,521 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 01:48:15,521 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 92 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:15,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 56 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 381 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 01:48:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 01:48:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-24 01:48:15,531 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 01:48:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-02-24 01:48:15,531 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 64 [2022-02-24 01:48:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:15,532 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-02-24 01:48:15,532 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 01:48:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-02-24 01:48:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:48:15,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:15,533 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 01:48:15,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:48:15,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1958796481, now seen corresponding path program 2 times [2022-02-24 01:48:15,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:15,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000312224] [2022-02-24 01:48:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:15,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:15,535 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 01:48:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:48:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:15,649 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 01:48:15,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:15,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000312224] [2022-02-24 01:48:15,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000312224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:15,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:15,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:48:15,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086685163] [2022-02-24 01:48:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:15,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:48:15,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:48:15,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:48:15,651 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 01:48:17,708 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 01:48:19,842 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 01:48:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:20,226 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2022-02-24 01:48:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:48:20,227 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 01:48:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:20,228 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:48:20,228 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 01:48:20,228 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 01:48:20,229 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:20,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 53 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 368 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 01:48:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 01:48:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2022-02-24 01:48:20,236 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 01:48:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-02-24 01:48:20,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 66 [2022-02-24 01:48:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:20,237 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-02-24 01:48:20,237 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 01:48:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-02-24 01:48:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 01:48:20,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:20,238 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 01:48:20,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:48:20,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:20,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 1 times [2022-02-24 01:48:20,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:20,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155477780] [2022-02-24 01:48:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:20,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:20,240 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:48:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,367 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 01:48:20,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:20,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155477780] [2022-02-24 01:48:20,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155477780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:20,368 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:20,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:48:20,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343020284] [2022-02-24 01:48:20,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:20,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:48:20,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:48:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:48:20,369 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 01:48:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:20,911 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2022-02-24 01:48:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:48:20,912 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 01:48:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:20,912 INFO L225 Difference]: With dead ends: 107 [2022-02-24 01:48:20,912 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 01:48:20,913 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 01:48:20,913 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:20,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 60 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:48:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 01:48:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-02-24 01:48:20,926 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 01:48:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-02-24 01:48:20,927 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 65 [2022-02-24 01:48:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:20,929 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-02-24 01:48:20,929 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 01:48:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-02-24 01:48:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:48:20,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:20,931 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 01:48:20,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:48:20,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 1 times [2022-02-24 01:48:20,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:20,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633006848] [2022-02-24 01:48:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:20,937 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:21,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:48:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:25,846 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 01:48:25,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:25,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633006848] [2022-02-24 01:48:25,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633006848] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:25,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:25,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:48:25,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034892428] [2022-02-24 01:48:25,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:25,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:48:25,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:48:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:48:25,850 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 01:48:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:28,687 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2022-02-24 01:48:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:48:28,689 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 01:48:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:28,690 INFO L225 Difference]: With dead ends: 123 [2022-02-24 01:48:28,690 INFO L226 Difference]: Without dead ends: 121 [2022-02-24 01:48:28,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:48:28,691 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:28,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 62 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:48:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-24 01:48:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2022-02-24 01:48:28,704 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 01:48:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-02-24 01:48:28,705 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 66 [2022-02-24 01:48:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:28,705 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-02-24 01:48:28,705 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 01:48:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-02-24 01:48:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 01:48:28,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:28,706 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 01:48:28,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:48:28,706 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1470293173, now seen corresponding path program 2 times [2022-02-24 01:48:28,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:28,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544119835] [2022-02-24 01:48:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:28,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:28,708 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:48:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,827 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 01:48:28,827 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:28,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544119835] [2022-02-24 01:48:28,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [544119835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:28,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:28,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:48:28,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070164245] [2022-02-24 01:48:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:28,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:48:28,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:48:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:48:28,830 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 01:48:30,885 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 01:48:31,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:31,458 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2022-02-24 01:48:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:48:31,458 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 01:48:31,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:31,459 INFO L225 Difference]: With dead ends: 127 [2022-02-24 01:48:31,459 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 01:48:31,460 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 01:48:31,460 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:31,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 63 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 520 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 01:48:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 01:48:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-02-24 01:48:31,476 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 01:48:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2022-02-24 01:48:31,477 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 67 [2022-02-24 01:48:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:31,477 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2022-02-24 01:48:31,477 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 01:48:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2022-02-24 01:48:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:48:31,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:31,478 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 01:48:31,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:48:31,478 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1247511922, now seen corresponding path program 3 times [2022-02-24 01:48:31,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:31,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630445218] [2022-02-24 01:48:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:31,480 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:48:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 01:48:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,639 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 01:48:31,639 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:31,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630445218] [2022-02-24 01:48:31,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630445218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:31,639 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:31,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:48:31,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870277806] [2022-02-24 01:48:31,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:31,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:48:31,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:48:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:48:31,640 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 01:48:33,731 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 01:48:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:34,509 INFO L93 Difference]: Finished difference Result 169 states and 215 transitions. [2022-02-24 01:48:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:48:34,510 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 01:48:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:34,511 INFO L225 Difference]: With dead ends: 169 [2022-02-24 01:48:34,511 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 01:48:34,511 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 01:48:34,512 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 110 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:34,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 733 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 01:48:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 01:48:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2022-02-24 01:48:34,532 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 01:48:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2022-02-24 01:48:34,533 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 68 [2022-02-24 01:48:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:34,533 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2022-02-24 01:48:34,533 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 01:48:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2022-02-24 01:48:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:48:34,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:34,534 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 01:48:34,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:48:34,534 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:34,535 INFO L85 PathProgramCache]: Analyzing trace with hash -677053431, now seen corresponding path program 4 times [2022-02-24 01:48:34,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:34,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959620065] [2022-02-24 01:48:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:34,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:34,537 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:48:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 01:48:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:34,694 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 01:48:34,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:34,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959620065] [2022-02-24 01:48:34,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959620065] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:34,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:34,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:48:34,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889332163] [2022-02-24 01:48:34,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:34,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:48:34,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:48:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:48:34,696 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 01:48:36,781 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 01:48:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:37,438 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2022-02-24 01:48:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:48:37,438 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 01:48:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:37,439 INFO L225 Difference]: With dead ends: 175 [2022-02-24 01:48:37,439 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 01:48:37,440 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 01:48:37,440 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:37,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 63 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 675 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 01:48:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 01:48:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-02-24 01:48:37,455 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 01:48:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2022-02-24 01:48:37,455 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 69 [2022-02-24 01:48:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:37,456 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2022-02-24 01:48:37,456 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 01:48:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2022-02-24 01:48:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:48:37,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:37,456 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 01:48:37,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:48:37,457 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1405616165, now seen corresponding path program 5 times [2022-02-24 01:48:37,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:37,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297789506] [2022-02-24 01:48:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:37,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:37,458 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:48:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:37,601 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 01:48:37,601 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:37,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297789506] [2022-02-24 01:48:37,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [297789506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:37,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:37,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:48:37,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783267364] [2022-02-24 01:48:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:37,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:48:37,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:48:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:48:37,602 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 01:48:39,668 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 01:48:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:40,241 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-02-24 01:48:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:48:40,241 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 01:48:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:40,242 INFO L225 Difference]: With dead ends: 143 [2022-02-24 01:48:40,242 INFO L226 Difference]: Without dead ends: 123 [2022-02-24 01:48:40,243 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 01:48:40,243 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:40,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 61 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 629 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 01:48:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-24 01:48:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2022-02-24 01:48:40,256 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 01:48:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-02-24 01:48:40,257 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 70 [2022-02-24 01:48:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:40,257 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-02-24 01:48:40,257 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 01:48:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-02-24 01:48:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:48:40,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:40,258 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 01:48:40,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:48:40,258 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 875388352, now seen corresponding path program 1 times [2022-02-24 01:48:40,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:40,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880382888] [2022-02-24 01:48:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:40,260 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 01:48:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 01:48:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,312 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 01:48:40,312 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:40,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880382888] [2022-02-24 01:48:40,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [880382888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:40,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:40,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:48:40,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613292761] [2022-02-24 01:48:40,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:40,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:48:40,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:48:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:48:40,314 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 01:48:42,346 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 01:48:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:42,606 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2022-02-24 01:48:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:48:42,607 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 01:48:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:42,608 INFO L225 Difference]: With dead ends: 162 [2022-02-24 01:48:42,608 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 01:48:42,608 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 01:48:42,609 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, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:42,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 105 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 01:48:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 01:48:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-24 01:48:42,621 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 01:48:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-02-24 01:48:42,621 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 73 [2022-02-24 01:48:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:42,622 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-02-24 01:48:42,622 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 01:48:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-02-24 01:48:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:42,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:42,622 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 01:48:42,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:48:42,623 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash -495926943, now seen corresponding path program 1 times [2022-02-24 01:48:42,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:42,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857612502] [2022-02-24 01:48:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:42,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:42,624 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:48:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:48:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:48:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,826 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 01:48:42,827 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:42,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857612502] [2022-02-24 01:48:42,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857612502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:42,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:42,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:48:42,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206859372] [2022-02-24 01:48:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:42,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:48:42,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:48:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:48:42,828 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 01:48:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:43,374 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-02-24 01:48:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:48:43,374 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 01:48:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:43,375 INFO L225 Difference]: With dead ends: 185 [2022-02-24 01:48:43,375 INFO L226 Difference]: Without dead ends: 123 [2022-02-24 01:48:43,375 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 01:48:43,376 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:43,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 64 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:48:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-24 01:48:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-02-24 01:48:43,391 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 01:48:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2022-02-24 01:48:43,391 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 74 [2022-02-24 01:48:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:43,391 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2022-02-24 01:48:43,392 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 01:48:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2022-02-24 01:48:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:48:43,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:43,392 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 01:48:43,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:48:43,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:43,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1541127366, now seen corresponding path program 6 times [2022-02-24 01:48:43,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:43,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424394972] [2022-02-24 01:48:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:43,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:43,394 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:48:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:48:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:43,591 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 01:48:43,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:43,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424394972] [2022-02-24 01:48:43,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [424394972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:43,592 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:43,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:48:43,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853879554] [2022-02-24 01:48:43,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:43,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:48:43,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:48:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:48:43,593 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 01:48:45,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:48:47,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:48:48,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:48,526 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-02-24 01:48:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:48:48,527 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 01:48:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:48,528 INFO L225 Difference]: With dead ends: 180 [2022-02-24 01:48:48,528 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:48:48,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:48:48,529 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 87 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:48,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 64 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 681 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-02-24 01:48:48,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:48:48,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 132. [2022-02-24 01:48:48,552 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 01:48:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2022-02-24 01:48:48,553 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 73 [2022-02-24 01:48:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:48,553 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2022-02-24 01:48:48,553 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 01:48:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2022-02-24 01:48:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:48:48,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:48,554 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 01:48:48,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:48:48,554 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1213658525, now seen corresponding path program 1 times [2022-02-24 01:48:48,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:48,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331064020] [2022-02-24 01:48:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:48,556 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 01:48:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-24 01:48:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:48:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 01:48:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:48:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:48:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:50,855 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 01:48:50,855 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:50,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331064020] [2022-02-24 01:48:50,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [331064020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:50,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:50,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:50,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755097012] [2022-02-24 01:48:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:50,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:48:50,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:50,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:48:50,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:48:50,857 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 01:48:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:54,571 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2022-02-24 01:48:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:54,571 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 01:48:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:54,572 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:48:54,572 INFO L226 Difference]: Without dead ends: 162 [2022-02-24 01:48:54,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=394, Invalid=4298, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:54,574 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:54,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 67 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 01:48:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-24 01:48:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2022-02-24 01:48:54,596 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 01:48:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2022-02-24 01:48:54,597 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 75 [2022-02-24 01:48:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:54,597 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2022-02-24 01:48:54,598 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 01:48:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2022-02-24 01:48:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:54,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:54,598 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 01:48:54,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:48:54,599 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:54,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1496849804, now seen corresponding path program 7 times [2022-02-24 01:48:54,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:54,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701714836] [2022-02-24 01:48:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:54,600 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:48:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:48:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:48:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:48:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:48:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:48:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:48:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:58,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:48:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:21,436 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 01:49:21,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:21,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701714836] [2022-02-24 01:49:21,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701714836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:21,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:21,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:49:21,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413533158] [2022-02-24 01:49:21,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:21,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:21,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:21,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:21,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:21,438 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 01:49:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:30,461 INFO L93 Difference]: Finished difference Result 200 states and 255 transitions. [2022-02-24 01:49:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:49:30,462 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 01:49:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:30,463 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:49:30,464 INFO L226 Difference]: Without dead ends: 198 [2022-02-24 01:49:30,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=409, Invalid=4703, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:49:30,465 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s 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, 4.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:30,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 71 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-24 01:49:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-24 01:49:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 169. [2022-02-24 01:49:30,498 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 01:49:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 215 transitions. [2022-02-24 01:49:30,499 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 215 transitions. Word has length 76 [2022-02-24 01:49:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:30,499 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 215 transitions. [2022-02-24 01:49:30,499 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 01:49:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 215 transitions. [2022-02-24 01:49:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 01:49:30,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:30,500 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 01:49:30,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:49:30,500 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1239460651, now seen corresponding path program 8 times [2022-02-24 01:49:30,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:30,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176634117] [2022-02-24 01:49:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:30,502 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:49:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:49:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:49:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:49:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:49:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:49:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:49:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:49:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:30,639 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 01:49:30,639 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:30,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176634117] [2022-02-24 01:49:30,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176634117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:30,639 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:30,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:49:30,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013020692] [2022-02-24 01:49:30,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:30,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:49:30,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:49:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:49:30,640 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 01:49:32,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:49:34,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:49:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:35,516 INFO L93 Difference]: Finished difference Result 196 states and 251 transitions. [2022-02-24 01:49:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:49:35,516 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 01:49:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:35,532 INFO L225 Difference]: With dead ends: 196 [2022-02-24 01:49:35,532 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 01:49:35,532 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 01:49:35,533 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 95 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:35,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 67 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 700 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-02-24 01:49:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 01:49:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-02-24 01:49:35,570 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 01:49:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 231 transitions. [2022-02-24 01:49:35,573 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 231 transitions. Word has length 77 [2022-02-24 01:49:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:35,573 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 231 transitions. [2022-02-24 01:49:35,573 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 01:49:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 231 transitions. [2022-02-24 01:49:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 01:49:35,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:35,575 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 01:49:35,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:49:35,575 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1092715177, now seen corresponding path program 9 times [2022-02-24 01:49:35,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:35,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183698162] [2022-02-24 01:49:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:35,578 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:49:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:49:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:49:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:49:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:49:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:49:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:49:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:49:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:35,703 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 01:49:35,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:35,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183698162] [2022-02-24 01:49:35,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [183698162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:35,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:35,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:49:35,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504070149] [2022-02-24 01:49:35,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:35,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:49:35,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:49:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:49:35,704 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 01:49:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:36,211 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2022-02-24 01:49:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:49:36,211 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 01:49:36,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:36,212 INFO L225 Difference]: With dead ends: 204 [2022-02-24 01:49:36,212 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:49:36,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:49:36,216 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:36,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:49:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:49:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-02-24 01:49:36,259 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 01:49:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 218 transitions. [2022-02-24 01:49:36,262 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 218 transitions. Word has length 77 [2022-02-24 01:49:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:36,263 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 218 transitions. [2022-02-24 01:49:36,263 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 01:49:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 218 transitions. [2022-02-24 01:49:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 01:49:36,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:36,264 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 01:49:36,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:49:36,265 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash 873001991, now seen corresponding path program 10 times [2022-02-24 01:49:36,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:36,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719392478] [2022-02-24 01:49:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:36,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:36,268 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:49:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:49:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:49:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:49:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:49:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:49:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:49:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-24 01:49:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:36,475 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 01:49:36,475 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:36,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719392478] [2022-02-24 01:49:36,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719392478] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:36,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:36,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:49:36,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544105778] [2022-02-24 01:49:36,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:49:36,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:49:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:49:36,476 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 01:49:38,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:49:40,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:49:42,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:49:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:43,721 INFO L93 Difference]: Finished difference Result 252 states and 318 transitions. [2022-02-24 01:49:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:49:43,721 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 01:49:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:43,722 INFO L225 Difference]: With dead ends: 252 [2022-02-24 01:49:43,722 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 01:49:43,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:49:43,723 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 104 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 81 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:43,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 62 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 732 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2022-02-24 01:49:43,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 01:49:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-02-24 01:49:43,758 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 01:49:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 230 transitions. [2022-02-24 01:49:43,759 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 230 transitions. Word has length 77 [2022-02-24 01:49:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:43,759 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 230 transitions. [2022-02-24 01:49:43,759 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 01:49:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 230 transitions. [2022-02-24 01:49:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:49:43,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:43,760 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 01:49:43,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:49:43,760 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:43,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1297400883, now seen corresponding path program 2 times [2022-02-24 01:49:43,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:43,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209605858] [2022-02-24 01:49:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:43,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:43,762 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:49:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:49:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:49:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 01:49:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-24 01:49:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:49:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 01:49:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:49:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:44,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-24 01:49:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:44,117 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 01:49:44,118 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:44,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209605858] [2022-02-24 01:49:44,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209605858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:44,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:44,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:49:44,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204190484] [2022-02-24 01:49:44,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:44,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:49:44,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:44,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:49:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:49:44,119 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 01:49:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:44,973 INFO L93 Difference]: Finished difference Result 222 states and 277 transitions. [2022-02-24 01:49:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:49:44,973 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 01:49:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:44,975 INFO L225 Difference]: With dead ends: 222 [2022-02-24 01:49:44,975 INFO L226 Difference]: Without dead ends: 204 [2022-02-24 01:49:44,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:49:44,976 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 116 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:44,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 70 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:49:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-24 01:49:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2022-02-24 01:49:45,028 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 01:49:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 228 transitions. [2022-02-24 01:49:45,029 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 228 transitions. Word has length 78 [2022-02-24 01:49:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:45,031 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 228 transitions. [2022-02-24 01:49:45,031 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 01:49:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 228 transitions. [2022-02-24 01:49:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:49:45,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:45,033 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 01:49:45,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:49:45,033 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2052199378, now seen corresponding path program 11 times [2022-02-24 01:49:45,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:45,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685470394] [2022-02-24 01:49:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:45,035 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:49:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:49:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:49:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:49:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:49:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:49:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:49:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:49:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:45,232 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 01:49:45,233 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:45,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685470394] [2022-02-24 01:49:45,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [685470394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:45,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:45,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:49:45,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791785753] [2022-02-24 01:49:45,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:45,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:49:45,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:49:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:49:45,234 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 01:49:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:46,094 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-02-24 01:49:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:49:46,095 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 01:49:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:46,096 INFO L225 Difference]: With dead ends: 199 [2022-02-24 01:49:46,096 INFO L226 Difference]: Without dead ends: 187 [2022-02-24 01:49:46,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:49:46,097 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:46,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:49:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-24 01:49:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-02-24 01:49:46,133 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 01:49:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-02-24 01:49:46,134 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 78 [2022-02-24 01:49:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:46,135 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-02-24 01:49:46,135 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 01:49:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-02-24 01:49:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 01:49:46,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:46,136 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 01:49:46,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:49:46,136 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:46,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1971107334, now seen corresponding path program 12 times [2022-02-24 01:49:46,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:46,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255498571] [2022-02-24 01:49:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:46,138 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:49:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:49:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:49:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:49:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:49:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:49:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:49:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:49:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,474 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 01:49:46,475 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:46,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255498571] [2022-02-24 01:49:46,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255498571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:46,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:46,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:49:46,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088414844] [2022-02-24 01:49:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:46,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:49:46,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:49:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:49:46,476 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 01:49:48,592 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 01:49:50,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:49:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:51,935 INFO L93 Difference]: Finished difference Result 251 states and 312 transitions. [2022-02-24 01:49:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:49:51,935 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 01:49:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:51,937 INFO L225 Difference]: With dead ends: 251 [2022-02-24 01:49:51,937 INFO L226 Difference]: Without dead ends: 239 [2022-02-24 01:49:51,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:49:51,938 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 128 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:51,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 75 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1346 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-02-24 01:49:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-24 01:49:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2022-02-24 01:49:51,982 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 01:49:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2022-02-24 01:49:51,983 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 79 [2022-02-24 01:49:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:51,983 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2022-02-24 01:49:51,983 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 01:49:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2022-02-24 01:49:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 01:49:51,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:51,984 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 01:49:51,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:49:51,984 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1406881591, now seen corresponding path program 13 times [2022-02-24 01:49:51,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:51,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316582440] [2022-02-24 01:49:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:51,986 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:49:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:49:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:49:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:49:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:49:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:49:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:49:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:49:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,449 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 01:49:52,449 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:52,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316582440] [2022-02-24 01:49:52,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316582440] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:52,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:52,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:49:52,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448508262] [2022-02-24 01:49:52,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:52,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:49:52,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:49:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:49:52,451 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 01:49:54,560 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 01:49:56,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:49:58,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:50:00,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:50:00,060 INFO L93 Difference]: Finished difference Result 253 states and 314 transitions. [2022-02-24 01:50:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:50:00,060 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 01:50:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:50:00,061 INFO L225 Difference]: With dead ends: 253 [2022-02-24 01:50:00,061 INFO L226 Difference]: Without dead ends: 241 [2022-02-24 01:50:00,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:50:00,062 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 114 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 86 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:50:00,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 75 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1277 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2022-02-24 01:50:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-24 01:50:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 201. [2022-02-24 01:50:00,109 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 01:50:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2022-02-24 01:50:00,114 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 79 [2022-02-24 01:50:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:50:00,115 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2022-02-24 01:50:00,115 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 01:50:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2022-02-24 01:50:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 01:50:00,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:50:00,116 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 01:50:00,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:50:00,116 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:50:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:50:00,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1520136901, now seen corresponding path program 14 times [2022-02-24 01:50:00,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:50:00,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219374169] [2022-02-24 01:50:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:50:00,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:50:00,120 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:50:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:50:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:50:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:50:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:50:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:50:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:50:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:50:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 01:50:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:00,289 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 01:50:00,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:50:00,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219374169] [2022-02-24 01:50:00,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [219374169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:50:00,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:50:00,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:50:00,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913138016] [2022-02-24 01:50:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:50:00,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:50:00,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:50:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:50:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:50:00,291 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 01:50:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:50:01,142 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2022-02-24 01:50:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:50:01,142 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 01:50:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:50:01,143 INFO L225 Difference]: With dead ends: 288 [2022-02-24 01:50:01,143 INFO L226 Difference]: Without dead ends: 213 [2022-02-24 01:50:01,144 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 01:50:01,144 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 01:50:01,144 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 01:50:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-24 01:50:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 191. [2022-02-24 01:50:01,186 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 01:50:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2022-02-24 01:50:01,187 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 80 [2022-02-24 01:50:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:50:01,187 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2022-02-24 01:50:01,187 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 01:50:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2022-02-24 01:50:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 01:50:01,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:50:01,188 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 01:50:01,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:50:01,189 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:50:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:50:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1163958224, now seen corresponding path program 15 times [2022-02-24 01:50:01,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:50:01,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930697517] [2022-02-24 01:50:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:50:01,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:50:01,190 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:50:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:50:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:50:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:05,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:50:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:05,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:50:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:05,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 01:50:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:05,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:50:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:50:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:50:07,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:50:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat