/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-34549b5 [2022-04-06 15:06:05,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:06:05,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:06:05,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 15:06:05,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 15:06:05,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 15:06:05,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 15:06:05,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 15:06:05,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 15:06:05,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 15:06:05,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 15:06:05,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 15:06:05,542 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 15:06:05,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 15:06:05,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 15:06:05,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 15:06:05,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 15:06:05,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 15:06:05,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:06:05,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:06:05,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:06:05,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 15:06:05,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:06:05,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:06:05,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:06:05,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:06:05,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:06:05,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:06:05,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:06:05,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:06:05,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:06:05,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:06:05,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:06:05,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:06:05,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:06:05,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:06:05,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:06:05,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:06:05,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:06:05,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:06:05,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:06:05,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:06:05,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:06:05,563 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:06:05,563 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:06:05,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:06:05,564 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:06:05,564 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:06:05,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:06:05,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:06:05,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:06:05,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:06:05,773 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:06:05,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-04-06 15:06:05,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c5e38c90/e32d93ae7edf4f25b1d3d7bcffdc663a/FLAG98b797f10 [2022-04-06 15:06:06,137 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:06:06,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-04-06 15:06:06,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c5e38c90/e32d93ae7edf4f25b1d3d7bcffdc663a/FLAG98b797f10 [2022-04-06 15:06:06,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c5e38c90/e32d93ae7edf4f25b1d3d7bcffdc663a [2022-04-06 15:06:06,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:06:06,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:06:06,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:06:06,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:06:06,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:06:06,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64161de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06, skipping insertion in model container [2022-04-06 15:06:06,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:06:06,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:06:06,713 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] [2022-04-06 15:06:06,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:06:06,765 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:06:06,778 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] [2022-04-06 15:06:06,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:06:06,810 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:06:06,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06 WrapperNode [2022-04-06 15:06:06,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:06:06,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:06:06,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:06:06,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:06:06,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:06:06,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:06:06,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:06:06,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:06:06,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (1/1) ... [2022-04-06 15:06:06,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:06:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:06,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 15:06:06,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2022-04-06 15:06:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-04-06 15:06:06,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:06:06,955 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-04-06 15:06:06,955 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-04-06 15:06:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:06:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:06:07,047 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:06:07,048 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:06:07,257 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:06:07,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:06:07,263 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-04-06 15:06:07,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:06:07 BoogieIcfgContainer [2022-04-06 15:06:07,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:06:07,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:06:07,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:06:07,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:06:07,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:06:06" (1/3) ... [2022-04-06 15:06:07,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703be1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:06:07, skipping insertion in model container [2022-04-06 15:06:07,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:06:06" (2/3) ... [2022-04-06 15:06:07,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703be1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:06:07, skipping insertion in model container [2022-04-06 15:06:07,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:06:07" (3/3) ... [2022-04-06 15:06:07,283 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-04-06 15:06:07,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:06:07,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:06:07,318 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:06:07,323 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 15:06:07,323 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:06:07,339 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) [2022-04-06 15:06:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 15:06:07,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:07,346 INFO L499 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] [2022-04-06 15:06:07,347 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 1 times [2022-04-06 15:06:07,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:07,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1366797931] [2022-04-06 15:06:07,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 2 times [2022-04-06 15:06:07,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:07,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964035131] [2022-04-06 15:06:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 15:06:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 15:06:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 15:06:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:07,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964035131] [2022-04-06 15:06:07,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964035131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:07,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:07,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 15:06:07,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:07,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1366797931] [2022-04-06 15:06:07,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1366797931] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:07,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:07,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 15:06:07,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2546363] [2022-04-06 15:06:07,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:07,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 15:06:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 15:06:07,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 15:06:07,707 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) [2022-04-06 15:06:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:07,854 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-04-06 15:06:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:06:07,856 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 [2022-04-06 15:06:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:07,861 INFO L225 Difference]: With dead ends: 127 [2022-04-06 15:06:07,862 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 15:06:07,864 INFO L912 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 [2022-04-06 15:06:07,866 INFO L913 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 [2022-04-06 15:06:07,867 INFO L914 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] [2022-04-06 15:06:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 15:06:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-04-06 15:06:07,894 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) [2022-04-06 15:06:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-04-06 15:06:07,897 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2022-04-06 15:06:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:07,897 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-04-06 15:06:07,897 INFO L479 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) [2022-04-06 15:06:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-04-06 15:06:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 15:06:07,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:07,899 INFO L499 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] [2022-04-06 15:06:07,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:06:07,899 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 1 times [2022-04-06 15:06:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:07,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358328381] [2022-04-06 15:06:07,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:07,901 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 2 times [2022-04-06 15:06:07,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:07,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258268406] [2022-04-06 15:06:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:07,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 15:06:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 15:06:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 15:06:08,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:08,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258268406] [2022-04-06 15:06:08,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258268406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:08,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:08,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:06:08,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:08,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358328381] [2022-04-06 15:06:08,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358328381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:08,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:08,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:06:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362999370] [2022-04-06 15:06:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:08,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:06:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:06:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 15:06:08,039 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) [2022-04-06 15:06:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:08,260 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-04-06 15:06:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:06:08,261 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 [2022-04-06 15:06:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:08,262 INFO L225 Difference]: With dead ends: 81 [2022-04-06 15:06:08,262 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 15:06:08,263 INFO L912 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 [2022-04-06 15:06:08,264 INFO L913 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 [2022-04-06 15:06:08,264 INFO L914 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] [2022-04-06 15:06:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 15:06:08,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-04-06 15:06:08,273 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) [2022-04-06 15:06:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-04-06 15:06:08,274 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2022-04-06 15:06:08,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:08,274 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-04-06 15:06:08,274 INFO L479 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) [2022-04-06 15:06:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-04-06 15:06:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 15:06:08,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:08,276 INFO L499 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] [2022-04-06 15:06:08,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 15:06:08,276 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 1 times [2022-04-06 15:06:08,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [820947883] [2022-04-06 15:06:08,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 2 times [2022-04-06 15:06:08,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952097100] [2022-04-06 15:06:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:08,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 15:06:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 15:06:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:06:08,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:08,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952097100] [2022-04-06 15:06:08,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952097100] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:08,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445163212] [2022-04-06 15:06:08,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:08,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:08,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:08,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 15:06:08,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 15:06:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:08,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 15:06:08,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:08,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-04-06 15:06:09,019 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-04-06 15:06:09,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-04-06 15:06:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:09,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:06:09,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445163212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:09,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:06:09,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 26 [2022-04-06 15:06:09,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [820947883] [2022-04-06 15:06:09,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [820947883] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:09,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:09,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:06:09,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406476678] [2022-04-06 15:06:09,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:09,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:06:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:06:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:06:09,084 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:06:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:09,188 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-04-06 15:06:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:06:09,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 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 56 [2022-04-06 15:06:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:09,189 INFO L225 Difference]: With dead ends: 83 [2022-04-06 15:06:09,189 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 15:06:09,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-04-06 15:06:09,191 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:09,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 474 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-04-06 15:06:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 15:06:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-04-06 15:06:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 15:06:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-04-06 15:06:09,201 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 56 [2022-04-06 15:06:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:09,201 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-04-06 15:06:09,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:06:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-04-06 15:06:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 15:06:09,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:09,203 INFO L499 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] [2022-04-06 15:06:09,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 15:06:09,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:09,421 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:09,421 INFO L85 PathProgramCache]: Analyzing trace with hash -35265218, now seen corresponding path program 1 times [2022-04-06 15:06:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:09,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709241156] [2022-04-06 15:06:09,421 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash -35265218, now seen corresponding path program 2 times [2022-04-06 15:06:09,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:09,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17656149] [2022-04-06 15:06:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 15:06:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 15:06:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 15:06:09,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:09,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17656149] [2022-04-06 15:06:09,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17656149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515402836] [2022-04-06 15:06:09,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:09,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:09,544 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:09,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 15:06:09,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 15:06:09,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 15:06:09,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:09,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-04-06 15:06:10,028 INFO L356 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-04-06 15:06:10,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 15:06:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:10,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:06:10,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515402836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:10,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:06:10,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 21 [2022-04-06 15:06:10,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:10,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709241156] [2022-04-06 15:06:10,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709241156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:10,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:10,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 15:06:10,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725446787] [2022-04-06 15:06:10,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:10,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 15:06:10,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 15:06:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:06:10,086 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:06:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:10,298 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-04-06 15:06:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:06:10,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 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 59 [2022-04-06 15:06:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:10,300 INFO L225 Difference]: With dead ends: 101 [2022-04-06 15:06:10,300 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 15:06:10,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:06:10,301 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:10,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 578 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-04-06 15:06:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 15:06:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2022-04-06 15:06:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2022-04-06 15:06:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-04-06 15:06:10,313 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 59 [2022-04-06 15:06:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:10,314 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-04-06 15:06:10,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:06:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-04-06 15:06:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 15:06:10,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:10,315 INFO L499 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] [2022-04-06 15:06:10,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 15:06:10,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 15:06:10,549 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash 281114777, now seen corresponding path program 1 times [2022-04-06 15:06:10,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:10,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1932951847] [2022-04-06 15:06:10,550 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:10,550 INFO L85 PathProgramCache]: Analyzing trace with hash 281114777, now seen corresponding path program 2 times [2022-04-06 15:06:10,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:10,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081100785] [2022-04-06 15:06:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:10,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 15:06:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 15:06:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 15:06:10,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081100785] [2022-04-06 15:06:10,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081100785] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645516653] [2022-04-06 15:06:10,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:10,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:10,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:10,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 15:06:10,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:10,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:10,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:06:10,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:10,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:11,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645516653] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:11,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:06:11,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 18 [2022-04-06 15:06:11,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1932951847] [2022-04-06 15:06:11,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1932951847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:11,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:11,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:06:11,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641138266] [2022-04-06 15:06:11,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:11,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:06:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:06:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:06:11,147 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:06:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:11,215 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2022-04-06 15:06:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:06:11,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 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 60 [2022-04-06 15:06:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:11,217 INFO L225 Difference]: With dead ends: 93 [2022-04-06 15:06:11,217 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 15:06:11,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:06:11,218 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:11,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 284 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:06:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 15:06:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-04-06 15:06:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-04-06 15:06:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2022-04-06 15:06:11,228 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 60 [2022-04-06 15:06:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:11,228 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2022-04-06 15:06:11,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:06:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2022-04-06 15:06:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 15:06:11,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:11,230 INFO L499 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, 1, 1] [2022-04-06 15:06:11,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:11,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:11,456 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 589581770, now seen corresponding path program 1 times [2022-04-06 15:06:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:11,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174375170] [2022-04-06 15:06:11,457 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash 589581770, now seen corresponding path program 2 times [2022-04-06 15:06:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:11,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031619514] [2022-04-06 15:06:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:11,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 15:06:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 15:06:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:11,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031619514] [2022-04-06 15:06:11,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031619514] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:11,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101431828] [2022-04-06 15:06:11,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:11,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:11,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:11,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 15:06:11,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:11,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:06:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:11,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:11,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101431828] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:11,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:11,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 15:06:11,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174375170] [2022-04-06 15:06:11,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174375170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:11,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:11,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:06:11,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494662700] [2022-04-06 15:06:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:11,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:06:11,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:06:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:06:11,884 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 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) [2022-04-06 15:06:13,926 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 [] [2022-04-06 15:06:16,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 15:06:18,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 15:06:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:18,585 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-04-06 15:06:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:06:18,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 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 62 [2022-04-06 15:06:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:18,586 INFO L225 Difference]: With dead ends: 125 [2022-04-06 15:06:18,586 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 15:06:18,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:06:18,587 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 76 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 39 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:18,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 291 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-04-06 15:06:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 15:06:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-04-06 15:06:18,596 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), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-04-06 15:06:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-04-06 15:06:18,597 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 62 [2022-04-06 15:06:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:18,597 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-04-06 15:06:18,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 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) [2022-04-06 15:06:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-04-06 15:06:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 15:06:18,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:18,605 INFO L499 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] [2022-04-06 15:06:18,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:18,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:18,822 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 1 times [2022-04-06 15:06:18,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531267803] [2022-04-06 15:06:18,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 2 times [2022-04-06 15:06:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164862968] [2022-04-06 15:06:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:18,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 15:06:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 15:06:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 15:06:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 15:06:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:18,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164862968] [2022-04-06 15:06:18,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164862968] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:18,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011338758] [2022-04-06 15:06:18,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:18,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:19,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 15:06:19,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:19,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:06:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:19,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:06:19,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011338758] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:19,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:06:19,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2022-04-06 15:06:19,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:19,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531267803] [2022-04-06 15:06:19,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531267803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:19,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:19,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:06:19,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006932285] [2022-04-06 15:06:19,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:19,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:06:19,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:19,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:06:19,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:06:19,225 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 15:06:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:19,329 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-04-06 15:06:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:06:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 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 64 [2022-04-06 15:06:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:19,332 INFO L225 Difference]: With dead ends: 101 [2022-04-06 15:06:19,332 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 15:06:19,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:06:19,333 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:19,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 368 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:06:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 15:06:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-04-06 15:06:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-06 15:06:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2022-04-06 15:06:19,354 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 64 [2022-04-06 15:06:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:19,354 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2022-04-06 15:06:19,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 15:06:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2022-04-06 15:06:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 15:06:19,361 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:19,361 INFO L499 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, 1, 1, 1] [2022-04-06 15:06:19,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:19,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:19,579 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1758641907, now seen corresponding path program 1 times [2022-04-06 15:06:19,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:19,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [444879403] [2022-04-06 15:06:19,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:19,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1758641907, now seen corresponding path program 2 times [2022-04-06 15:06:19,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:19,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261614592] [2022-04-06 15:06:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:19,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 15:06:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 15:06:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:19,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261614592] [2022-04-06 15:06:19,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261614592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920063477] [2022-04-06 15:06:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:19,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:19,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:19,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 15:06:19,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:06:19,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:19,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:20,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920063477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:20,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:20,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 13 [2022-04-06 15:06:20,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:20,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [444879403] [2022-04-06 15:06:20,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [444879403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:20,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:20,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:06:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489165212] [2022-04-06 15:06:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:20,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:06:20,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:06:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:06:20,079 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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) [2022-04-06 15:06:22,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 15:06:24,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 15:06:26,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 15:06:28,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 15:06:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:29,033 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2022-04-06 15:06:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:06:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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 63 [2022-04-06 15:06:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:29,034 INFO L225 Difference]: With dead ends: 107 [2022-04-06 15:06:29,034 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 15:06:29,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:06:29,035 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 42 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:29,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 55 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 404 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2022-04-06 15:06:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 15:06:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-04-06 15:06:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-06 15:06:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-04-06 15:06:29,043 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 63 [2022-04-06 15:06:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:29,043 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-04-06 15:06:29,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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) [2022-04-06 15:06:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-04-06 15:06:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 15:06:29,044 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:29,044 INFO L499 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] [2022-04-06 15:06:29,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:29,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:29,260 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 3 times [2022-04-06 15:06:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:29,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106787040] [2022-04-06 15:06:29,261 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 4 times [2022-04-06 15:06:29,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:29,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519544695] [2022-04-06 15:06:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:29,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 15:06:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 15:06:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:29,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:29,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519544695] [2022-04-06 15:06:29,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519544695] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:29,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757991087] [2022-04-06 15:06:29,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:06:29,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:29,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:29,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:29,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 15:06:29,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:06:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:29,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 15:06:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:29,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:30,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757991087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:30,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:30,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-04-06 15:06:30,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:30,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106787040] [2022-04-06 15:06:30,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106787040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:30,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:30,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:06:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22683183] [2022-04-06 15:06:30,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:30,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:06:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:06:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:06:30,083 INFO L87 Difference]: Start difference. First operand 73 states and 82 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) [2022-04-06 15:06:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:30,537 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-04-06 15:06:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:06:30,537 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 [2022-04-06 15:06:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:30,538 INFO L225 Difference]: With dead ends: 95 [2022-04-06 15:06:30,538 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 15:06:30,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2022-04-06 15:06:30,539 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:30,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:06:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 15:06:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-04-06 15:06:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-06 15:06:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-04-06 15:06:30,546 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 65 [2022-04-06 15:06:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:30,547 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-04-06 15:06:30,547 INFO L479 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) [2022-04-06 15:06:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-04-06 15:06:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 15:06:30,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:30,547 INFO L499 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] [2022-04-06 15:06:30,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:30,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:30,748 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 1 times [2022-04-06 15:06:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:30,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86024800] [2022-04-06 15:06:30,749 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 2 times [2022-04-06 15:06:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:30,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236480769] [2022-04-06 15:06:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 15:06:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 15:06:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:06:36,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:36,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236480769] [2022-04-06 15:06:36,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236480769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:36,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778914919] [2022-04-06 15:06:36,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:36,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:36,159 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:36,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 15:06:36,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:36,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 15:06:36,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:36,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-04-06 15:06:36,943 INFO L356 Elim1Store]: treesize reduction 151, result has 25.2 percent of original size [2022-04-06 15:06:36,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 68 [2022-04-06 15:06:37,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-04-06 15:06:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:06:37,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:37,929 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 15:06:37,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 176 [2022-04-06 15:06:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:37,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:37,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:37,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,077 INFO L356 Elim1Store]: treesize reduction 149, result has 55.4 percent of original size [2022-04-06 15:06:38,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 207 treesize of output 425 [2022-04-06 15:06:38,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 15:06:38,245 INFO L356 Elim1Store]: treesize reduction 138, result has 16.9 percent of original size [2022-04-06 15:06:38,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 81 [2022-04-06 15:06:38,283 INFO L356 Elim1Store]: treesize reduction 73, result has 29.1 percent of original size [2022-04-06 15:06:38,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 57 [2022-04-06 15:06:38,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-04-06 15:06:38,801 INFO L356 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2022-04-06 15:06:38,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2588 treesize of output 1 [2022-04-06 15:06:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:06:39,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778914919] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:39,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:39,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 17] total 59 [2022-04-06 15:06:39,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86024800] [2022-04-06 15:06:39,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86024800] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:39,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:39,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 15:06:39,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648335263] [2022-04-06 15:06:39,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:39,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 15:06:39,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 15:06:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 15:06:39,294 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 26 states, 22 states have (on average 2.0) internal successors, (44), 20 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) [2022-04-06 15:06:41,440 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 [] [2022-04-06 15:06:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:44,249 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-04-06 15:06:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 15:06:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.0) internal successors, (44), 20 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 [2022-04-06 15:06:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:44,252 INFO L225 Difference]: With dead ends: 110 [2022-04-06 15:06:44,252 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 15:06:44,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=551, Invalid=6421, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 15:06:44,254 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 188 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 183 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:44,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 60 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 892 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 15:06:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 15:06:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2022-04-06 15:06:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 66 states have internal predecessors, (76), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-04-06 15:06:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-04-06 15:06:44,276 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 66 [2022-04-06 15:06:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:44,277 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-04-06 15:06:44,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.0) internal successors, (44), 20 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) [2022-04-06 15:06:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-04-06 15:06:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 15:06:44,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:44,279 INFO L499 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] [2022-04-06 15:06:44,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 15:06:44,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 15:06:44,492 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1470293173, now seen corresponding path program 3 times [2022-04-06 15:06:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1337429792] [2022-04-06 15:06:44,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1470293173, now seen corresponding path program 4 times [2022-04-06 15:06:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157720050] [2022-04-06 15:06:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 15:06:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 15:06:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157720050] [2022-04-06 15:06:44,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157720050] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975580325] [2022-04-06 15:06:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:06:44,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:44,631 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:44,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 15:06:44,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:06:44,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:44,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 15:06:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:44,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:45,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975580325] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:45,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:45,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-04-06 15:06:45,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:45,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1337429792] [2022-04-06 15:06:45,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1337429792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:45,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:45,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:06:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596996558] [2022-04-06 15:06:45,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:45,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:06:45,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:06:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:06:45,076 INFO L87 Difference]: Start difference. First operand 89 states and 107 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) [2022-04-06 15:06:47,148 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 [] [2022-04-06 15:06:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:47,726 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2022-04-06 15:06:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:06:47,726 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 [2022-04-06 15:06:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:47,727 INFO L225 Difference]: With dead ends: 114 [2022-04-06 15:06:47,727 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 15:06:47,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-04-06 15:06:47,728 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:47,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 69 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 708 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 15:06:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 15:06:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-04-06 15:06:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) [2022-04-06 15:06:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2022-04-06 15:06:47,743 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 67 [2022-04-06 15:06:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:47,743 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2022-04-06 15:06:47,743 INFO L479 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) [2022-04-06 15:06:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2022-04-06 15:06:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 15:06:47,744 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:47,744 INFO L499 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] [2022-04-06 15:06:47,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:47,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:47,960 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1247511922, now seen corresponding path program 5 times [2022-04-06 15:06:47,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:47,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22634008] [2022-04-06 15:06:47,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:47,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1247511922, now seen corresponding path program 6 times [2022-04-06 15:06:47,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:47,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506695395] [2022-04-06 15:06:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:47,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 15:06:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 15:06:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:48,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:48,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506695395] [2022-04-06 15:06:48,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506695395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:48,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303341653] [2022-04-06 15:06:48,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:06:48,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:48,095 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:48,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 15:06:48,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 15:06:48,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 15:06:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 15:06:48,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:06:49,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303341653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:49,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:49,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 20] total 42 [2022-04-06 15:06:49,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:49,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22634008] [2022-04-06 15:06:49,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22634008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:49,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:49,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593713425] [2022-04-06 15:06:49,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:49,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:06:49,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:06:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:06:49,603 INFO L87 Difference]: Start difference. First operand 97 states and 118 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) [2022-04-06 15:06:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:50,254 INFO L93 Difference]: Finished difference Result 166 states and 205 transitions. [2022-04-06 15:06:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 15:06:50,255 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 [2022-04-06 15:06:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:50,256 INFO L225 Difference]: With dead ends: 166 [2022-04-06 15:06:50,256 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 15:06:50,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=258, Invalid=2822, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 15:06:50,257 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 94 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:50,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 64 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:06:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 15:06:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2022-04-06 15:06:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 83 states have internal predecessors, (97), 15 states have call successors, (15), 11 states have call predecessors, (15), 12 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2022-04-06 15:06:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2022-04-06 15:06:50,272 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 68 [2022-04-06 15:06:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:50,273 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2022-04-06 15:06:50,273 INFO L479 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) [2022-04-06 15:06:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2022-04-06 15:06:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 15:06:50,273 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:50,273 INFO L499 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] [2022-04-06 15:06:50,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:50,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 15:06:50,490 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash 617921138, now seen corresponding path program 1 times [2022-04-06 15:06:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:50,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021425682] [2022-04-06 15:06:50,491 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:50,491 INFO L85 PathProgramCache]: Analyzing trace with hash 617921138, now seen corresponding path program 2 times [2022-04-06 15:06:50,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:50,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701616354] [2022-04-06 15:06:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 15:06:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 15:06:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 15:06:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:06:50,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:50,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701616354] [2022-04-06 15:06:50,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701616354] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:50,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830521219] [2022-04-06 15:06:50,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:50,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:50,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:50,657 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:50,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 15:06:50,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:50,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:50,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:06:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 15:06:51,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:06:51,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830521219] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:51,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:06:51,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 24 [2022-04-06 15:06:51,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:51,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021425682] [2022-04-06 15:06:51,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021425682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:51,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:51,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196094339] [2022-04-06 15:06:51,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:51,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:06:51,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:51,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:06:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2022-04-06 15:06:51,035 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 13 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 15:06:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:51,254 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2022-04-06 15:06:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 15:06:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 70 [2022-04-06 15:06:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:51,255 INFO L225 Difference]: With dead ends: 129 [2022-04-06 15:06:51,255 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 15:06:51,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2022-04-06 15:06:51,256 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:51,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 536 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:06:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 15:06:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2022-04-06 15:06:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.236842105263158) internal successors, (94), 80 states have internal predecessors, (94), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-04-06 15:06:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-04-06 15:06:51,269 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 70 [2022-04-06 15:06:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:51,269 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-04-06 15:06:51,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 15:06:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-04-06 15:06:51,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 15:06:51,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:51,270 INFO L499 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] [2022-04-06 15:06:51,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:51,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 15:06:51,486 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:51,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:51,486 INFO L85 PathProgramCache]: Analyzing trace with hash -677053431, now seen corresponding path program 7 times [2022-04-06 15:06:51,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:51,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293380437] [2022-04-06 15:06:51,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:51,487 INFO L85 PathProgramCache]: Analyzing trace with hash -677053431, now seen corresponding path program 8 times [2022-04-06 15:06:51,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:51,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595325122] [2022-04-06 15:06:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:51,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 15:06:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 15:06:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 15:06:51,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595325122] [2022-04-06 15:06:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595325122] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450878173] [2022-04-06 15:06:51,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:51,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:51,616 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:51,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 15:06:51,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:51,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:06:51,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:06:51,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:06:52,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450878173] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:52,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:52,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 19 [2022-04-06 15:06:52,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:52,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1293380437] [2022-04-06 15:06:52,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1293380437] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:52,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:52,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:06:52,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482042133] [2022-04-06 15:06:52,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:52,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:06:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:06:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:06:52,021 INFO L87 Difference]: Start difference. First operand 103 states and 125 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) [2022-04-06 15:06:54,080 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 [] [2022-04-06 15:06:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:54,612 INFO L93 Difference]: Finished difference Result 165 states and 203 transitions. [2022-04-06 15:06:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:06:54,612 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 [2022-04-06 15:06:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:54,613 INFO L225 Difference]: With dead ends: 165 [2022-04-06 15:06:54,613 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 15:06:54,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-04-06 15:06:54,614 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 67 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:54,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 63 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 662 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 15:06:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 15:06:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-04-06 15:06:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 86 states have internal predecessors, (102), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-04-06 15:06:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-04-06 15:06:54,633 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 69 [2022-04-06 15:06:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:54,633 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-04-06 15:06:54,634 INFO L479 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) [2022-04-06 15:06:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-04-06 15:06:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 15:06:54,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:54,634 INFO L499 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] [2022-04-06 15:06:54,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:54,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 15:06:54,851 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1405616165, now seen corresponding path program 9 times [2022-04-06 15:06:54,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158224779] [2022-04-06 15:06:54,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1405616165, now seen corresponding path program 10 times [2022-04-06 15:06:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:54,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813986256] [2022-04-06 15:06:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 15:06:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:54,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 15:06:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:06:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813986256] [2022-04-06 15:06:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813986256] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663661677] [2022-04-06 15:06:55,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:06:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:55,016 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:55,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 15:06:55,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:06:55,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 15:06:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:06:55,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:06:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663661677] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:55,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:55,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 25 [2022-04-06 15:06:55,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158224779] [2022-04-06 15:06:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158224779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:55,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:55,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 15:06:55,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458923342] [2022-04-06 15:06:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:55,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 15:06:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 15:06:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-04-06 15:06:55,614 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 12 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) [2022-04-06 15:06:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:56,017 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2022-04-06 15:06:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:06:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 12 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 [2022-04-06 15:06:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:56,018 INFO L225 Difference]: With dead ends: 127 [2022-04-06 15:06:56,018 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 15:06:56,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 15:06:56,019 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:56,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 55 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:06:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 15:06:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2022-04-06 15:06:56,031 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) [2022-04-06 15:06:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-04-06 15:06:56,031 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 70 [2022-04-06 15:06:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:56,032 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-04-06 15:06:56,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 12 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) [2022-04-06 15:06:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-04-06 15:06:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 15:06:56,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:56,032 INFO L499 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] [2022-04-06 15:06:56,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:56,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 15:06:56,248 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -495926943, now seen corresponding path program 1 times [2022-04-06 15:06:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:56,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293133142] [2022-04-06 15:06:56,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:06:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -495926943, now seen corresponding path program 2 times [2022-04-06 15:06:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:56,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190232247] [2022-04-06 15:06:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:06:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:06:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:06:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:06:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:06:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 15:06:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 15:06:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 15:06:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 15:06:56,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190232247] [2022-04-06 15:06:56,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190232247] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475154892] [2022-04-06 15:06:56,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:06:56,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:56,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:56,428 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:56,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 15:06:56,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:06:56,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:06:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-06 15:06:56,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:56,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-04-06 15:06:56,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-04-06 15:06:56,616 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 15:06:56,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-04-06 15:06:56,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 15:06:56,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-04-06 15:06:56,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-04-06 15:07:00,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-04-06 15:07:05,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 74 [2022-04-06 15:07:10,761 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_565 Int) (v_main_~n~0_BEFORE_CALL_47 Int) (upsweep_~a.offset Int) (v_check_~a0.base_BEFORE_CALL_1 Int) (v_ArrVal_571 Int) (v_check_~a.base_BEFORE_CALL_1 Int) (downsweep_~left~1 Int) (upsweep_~right~0 Int)) (let ((.cse0 ((as const (Array Int Int)) 0))) (and (<= 0 upsweep_~a.offset) (= .cse0 (select |c_#memory_int| v_check_~a0.base_BEFORE_CALL_1)) (<= v_main_~n~0_BEFORE_CALL_47 2) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1) (let ((.cse2 (* downsweep_~left~1 4))) (store (let ((.cse1 (store (store .cse0 (+ (* upsweep_~right~0 4) upsweep_~a.offset) v_ArrVal_565) (+ (- 4) (* v_main_~n~0_BEFORE_CALL_47 4)) 0))) (store .cse1 4 (+ (select .cse1 4) (select .cse1 .cse2)))) .cse2 v_ArrVal_571))) (<= 1 upsweep_~right~0) (not (= v_check_~a0.base_BEFORE_CALL_1 v_check_~a.base_BEFORE_CALL_1)) (<= downsweep_~left~1 0)))) is different from true [2022-04-06 15:07:28,266 INFO L356 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-04-06 15:07:28,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 163 treesize of output 175 [2022-04-06 15:07:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 2 not checked. [2022-04-06 15:07:29,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:29,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475154892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:07:29,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:29,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 32] total 41 [2022-04-06 15:07:29,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293133142] [2022-04-06 15:07:29,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293133142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:29,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:29,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:07:29,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033345695] [2022-04-06 15:07:29,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:29,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:07:29,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:07:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1776, Unknown=10, NotChecked=84, Total=1980 [2022-04-06 15:07:29,538 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) [2022-04-06 15:07:31,676 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 [] [2022-04-06 15:07:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:32,354 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-04-06 15:07:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:07:32,355 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 [2022-04-06 15:07:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:32,358 INFO L225 Difference]: With dead ends: 185 [2022-04-06 15:07:32,358 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 15:07:32,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=190, Invalid=2884, Unknown=10, NotChecked=108, Total=3192 [2022-04-06 15:07:32,360 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 80 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:32,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 67 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 548 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 15:07:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 15:07:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-04-06 15:07:32,401 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) [2022-04-06 15:07:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2022-04-06 15:07:32,405 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 74 [2022-04-06 15:07:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:32,405 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2022-04-06 15:07:32,405 INFO L479 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) [2022-04-06 15:07:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2022-04-06 15:07:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 15:07:32,409 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:32,409 INFO L499 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] [2022-04-06 15:07:32,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:32,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:32,626 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1541127366, now seen corresponding path program 11 times [2022-04-06 15:07:32,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:32,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636982469] [2022-04-06 15:07:32,626 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1541127366, now seen corresponding path program 12 times [2022-04-06 15:07:32,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:32,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038474217] [2022-04-06 15:07:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:32,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:07:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:07:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:07:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:07:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:07:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:07:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 15:07:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 15:07:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 15:07:32,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:32,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038474217] [2022-04-06 15:07:32,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038474217] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:07:32,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306906936] [2022-04-06 15:07:32,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:07:32,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:32,847 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:32,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 15:07:32,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 15:07:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:07:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 15:07:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 15:07:33,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 15:07:34,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306906936] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:34,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:07:34,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 36 [2022-04-06 15:07:34,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:34,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636982469] [2022-04-06 15:07:34,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636982469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:34,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:34,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:07:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901253411] [2022-04-06 15:07:34,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:34,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:07:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:07:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 15:07:34,197 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) [2022-04-06 15:07:36,263 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 [] [2022-04-06 15:07:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:36,950 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-04-06 15:07:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:07:36,950 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 [2022-04-06 15:07:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:36,951 INFO L225 Difference]: With dead ends: 180 [2022-04-06 15:07:36,951 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 15:07:36,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=2023, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 15:07:36,952 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 90 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:36,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 62 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 625 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 15:07:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 15:07:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 132. [2022-04-06 15:07:36,970 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) [2022-04-06 15:07:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2022-04-06 15:07:36,971 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 73 [2022-04-06 15:07:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:36,971 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2022-04-06 15:07:36,971 INFO L479 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) [2022-04-06 15:07:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2022-04-06 15:07:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 15:07:36,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:36,972 INFO L499 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] [2022-04-06 15:07:36,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:37,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 15:07:37,187 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1213658525, now seen corresponding path program 1 times [2022-04-06 15:07:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:37,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299140069] [2022-04-06 15:07:37,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1213658525, now seen corresponding path program 2 times [2022-04-06 15:07:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:37,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118822888] [2022-04-06 15:07:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:07:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:07:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:07:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 15:07:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 15:07:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 15:07:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:38,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 15:07:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:38,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 15:07:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 15:07:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:07:39,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118822888] [2022-04-06 15:07:39,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118822888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:07:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408882289] [2022-04-06 15:07:39,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:07:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:39,983 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:39,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 15:07:40,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:07:40,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:07:40,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 132 conjunts are in the unsatisfiable core [2022-04-06 15:07:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:40,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-04-06 15:07:40,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-04-06 15:07:40,248 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 15:07:40,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-04-06 15:07:40,262 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_678 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_678))) is different from true [2022-04-06 15:07:40,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-04-06 15:07:40,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-04-06 15:07:40,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-04-06 15:07:40,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-04-06 15:07:40,404 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-04-06 15:07:40,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-04-06 15:07:49,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2022-04-06 15:07:51,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 98 [2022-04-06 15:08:53,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 160 [2022-04-06 15:08:53,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-04-06 15:08:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 2 not checked. [2022-04-06 15:08:53,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:16,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408882289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:11:16,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:16,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32] total 59 [2022-04-06 15:11:16,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299140069] [2022-04-06 15:11:16,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299140069] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:16,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:16,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 15:11:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368498767] [2022-04-06 15:11:16,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:16,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 15:11:16,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:16,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 15:11:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=4597, Unknown=83, NotChecked=138, Total=5112 [2022-04-06 15:11:16,060 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) [2022-04-06 15:11:20,403 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 [] [2022-04-06 15:12:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:07,548 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2022-04-06 15:12:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 15:12:07,548 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 [2022-04-06 15:12:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:07,549 INFO L225 Difference]: With dead ends: 164 [2022-04-06 15:12:07,549 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 15:12:07,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2591 ImplicationChecksByTransitivity, 262.7s TimeCoverageRelationStatistics Valid=689, Invalid=10130, Unknown=105, NotChecked=206, Total=11130 [2022-04-06 15:12:07,551 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 125 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 135 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:07,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 73 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2038 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 15:12:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 15:12:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2022-04-06 15:12:07,573 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) [2022-04-06 15:12:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2022-04-06 15:12:07,574 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 75 [2022-04-06 15:12:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:07,574 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2022-04-06 15:12:07,574 INFO L479 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) [2022-04-06 15:12:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2022-04-06 15:12:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 15:12:07,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:07,575 INFO L499 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] [2022-04-06 15:12:07,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 15:12:07,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 15:12:07,782 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1496849804, now seen corresponding path program 13 times [2022-04-06 15:12:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:07,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1394177696] [2022-04-06 15:12:07,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1496849804, now seen corresponding path program 14 times [2022-04-06 15:12:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:07,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102852277] [2022-04-06 15:12:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:09,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:12:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:09,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:12:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:09,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:12:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:09,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 15:12:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:09,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 15:12:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:09,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 15:12:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:09,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 15:12:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 15:12:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat