/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:59:56,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:59:56,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:59:56,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 17:59:56,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 17:59:56,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 17:59:56,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 17:59:56,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 17:59:56,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 17:59:56,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 17:59:56,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 17:59:56,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 17:59:56,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 17:59:56,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 17:59:56,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 17:59:56,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 17:59:56,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 17:59:56,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 17:59:56,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 17:59:57,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 17:59:57,001 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 17:59:57,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 17:59:57,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 17:59:57,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 17:59:57,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 17:59:57,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 17:59:57,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 17:59:57,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 17:59:57,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 17:59:57,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 17:59:57,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 17:59:57,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 17:59:57,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 17:59:57,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 17:59:57,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 17:59:57,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 17:59:57,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 17:59:57,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 17:59:57,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 17:59:57,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:59:57,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:59:57,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:59:57,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:59:57,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:59:57,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:59:57,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:59:57,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:59:57,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:59:57,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:59:57,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:59:57,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:59:57,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:59:57,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:59:57,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:59:57,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:59:57,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:59:57,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:59:57,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:59:57,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:59:57,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:59:57,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:59:57,036 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:59:57,036 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:59:57,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:59:57,036 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:59:57,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:59:57,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:59:57,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:59:57,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:59:57,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:59:57,275 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:59:57,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2022-03-20 17:59:57,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d884079d/bd5e65a4d0e34baab9d6dbbc9cd6fb70/FLAG7a90ae3bb [2022-03-20 17:59:57,686 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:59:57,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2022-03-20 17:59:57,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d884079d/bd5e65a4d0e34baab9d6dbbc9cd6fb70/FLAG7a90ae3bb [2022-03-20 17:59:57,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d884079d/bd5e65a4d0e34baab9d6dbbc9cd6fb70 [2022-03-20 17:59:57,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:59:57,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:59:57,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:59:57,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:59:57,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:59:57,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfb554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57, skipping insertion in model container [2022-03-20 17:59:57,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:59:57,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:59:57,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2022-03-20 17:59:57,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:59:57,874 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:59:57,883 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2022-03-20 17:59:57,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:59:57,898 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:59:57,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57 WrapperNode [2022-03-20 17:59:57,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:59:57,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:59:57,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:59:57,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:59:57,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:59:57,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:59:57,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:59:57,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:59:57,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (1/1) ... [2022-03-20 17:59:57,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:59:57,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:57,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:59:57,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:59:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:59:57,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:59:57,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:59:57,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:59:57,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:59:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:59:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:59:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:59:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:59:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:59:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:59:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:59:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:59:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:59:57,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-20 17:59:57,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:59:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:59:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:59:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:59:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:59:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:59:58,074 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:59:58,075 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:59:58,192 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:59:58,196 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:59:58,196 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:59:58,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:59:58 BoogieIcfgContainer [2022-03-20 17:59:58,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:59:58,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:59:58,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:59:58,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:59:58,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:59:57" (1/3) ... [2022-03-20 17:59:58,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51811046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:59:58, skipping insertion in model container [2022-03-20 17:59:58,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:59:57" (2/3) ... [2022-03-20 17:59:58,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51811046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:59:58, skipping insertion in model container [2022-03-20 17:59:58,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:59:58" (3/3) ... [2022-03-20 17:59:58,207 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2022-03-20 17:59:58,211 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:59:58,212 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:59:58,257 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:59:58,262 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 [2022-03-20 17:59:58,263 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:59:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:59:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 17:59:58,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:58,281 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:59:58,282 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:58,286 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2022-03-20 17:59:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:58,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [932370069] [2022-03-20 17:59:58,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:59:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 2 times [2022-03-20 17:59:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:58,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941482794] [2022-03-20 17:59:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:58,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941482794] [2022-03-20 17:59:58,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941482794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:58,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:58,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:59:58,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:58,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [932370069] [2022-03-20 17:59:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [932370069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:58,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:58,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:59:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656849751] [2022-03-20 17:59:58,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:58,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:59:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:58,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:59:58,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:59:58,547 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:58,605 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-20 17:59:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:59:58,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 17:59:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:58,616 INFO L225 Difference]: With dead ends: 34 [2022-03-20 17:59:58,616 INFO L226 Difference]: Without dead ends: 14 [2022-03-20 17:59:58,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:59:58,621 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:58,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:59:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-20 17:59:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-20 17:59:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-20 17:59:58,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-03-20 17:59:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:58,659 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-20 17:59:58,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-20 17:59:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 17:59:58,660 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:58,660 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:59:58,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:59:58,660 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2022-03-20 17:59:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931466459] [2022-03-20 17:59:58,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:59:58,662 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 2 times [2022-03-20 17:59:58,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:58,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548428450] [2022-03-20 17:59:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:58,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:58,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548428450] [2022-03-20 17:59:58,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548428450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:58,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:58,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:59:58,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:58,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931466459] [2022-03-20 17:59:58,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931466459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:58,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:58,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:59:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911029247] [2022-03-20 17:59:58,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:58,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:59:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:59:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:59:58,782 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:58,822 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-20 17:59:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:59:58,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 17:59:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:58,825 INFO L225 Difference]: With dead ends: 22 [2022-03-20 17:59:58,825 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 17:59:58,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:59:58,829 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:58,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:59:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 17:59:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-20 17:59:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-20 17:59:58,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-20 17:59:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:58,841 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-20 17:59:58,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-20 17:59:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 17:59:58,842 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:58,842 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:59:58,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:59:58,843 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:58,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2022-03-20 17:59:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:58,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1598026568] [2022-03-20 17:59:58,853 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:58,853 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 2 times [2022-03-20 17:59:58,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:58,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740942136] [2022-03-20 17:59:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:58,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:58,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:58,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:58,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740942136] [2022-03-20 17:59:58,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740942136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:58,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99128388] [2022-03-20 17:59:58,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:59:58,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:58,955 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) [2022-03-20 17:59:58,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:59:59,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:59:59,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:59,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 17:59:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:59,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99128388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:59,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:59,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 17:59:59,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1598026568] [2022-03-20 17:59:59,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1598026568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:59,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:59,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:59:59,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102985363] [2022-03-20 17:59:59,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:59,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:59:59,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:59:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:59:59,141 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:59,178 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-20 17:59:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:59:59,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 17:59:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:59,179 INFO L225 Difference]: With dead ends: 24 [2022-03-20 17:59:59,179 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 17:59:59,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:59:59,181 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:59,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:59:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 17:59:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-03-20 17:59:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-20 17:59:59,186 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-03-20 17:59:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:59,186 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-20 17:59:59,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-20 17:59:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 17:59:59,187 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:59,187 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:59:59,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:59,407 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 [2022-03-20 17:59:59,408 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 3 times [2022-03-20 17:59:59,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:59,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192899897] [2022-03-20 17:59:59,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:59,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 4 times [2022-03-20 17:59:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:59,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036819078] [2022-03-20 17:59:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:59,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036819078] [2022-03-20 17:59:59,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036819078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444401105] [2022-03-20 17:59:59,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:59:59,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:59,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:59,515 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) [2022-03-20 17:59:59,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:59:59,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:59:59,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:59,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:59:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:59,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:59:59,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444401105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:59,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:59,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 17:59:59,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:59,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192899897] [2022-03-20 17:59:59,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192899897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:59,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:59,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:59:59,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786156745] [2022-03-20 17:59:59,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:59,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:59:59,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:59:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:59:59,720 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:59,781 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-20 17:59:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:59:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 17:59:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:59,784 INFO L225 Difference]: With dead ends: 26 [2022-03-20 17:59:59,784 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 17:59:59,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:59:59,794 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:59,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:59:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 17:59:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-20 17:59:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-20 17:59:59,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-03-20 17:59:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:59,798 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-20 17:59:59,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-20 17:59:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 17:59:59,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:59,799 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:59:59,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:00,000 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 [2022-03-20 18:00:00,000 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 5 times [2022-03-20 18:00:00,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:00,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [426514887] [2022-03-20 18:00:00,003 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:00,003 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 6 times [2022-03-20 18:00:00,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:00,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404530218] [2022-03-20 18:00:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:00,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404530218] [2022-03-20 18:00:00,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404530218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655148230] [2022-03-20 18:00:00,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:00,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:00,063 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) [2022-03-20 18:00:00,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:00:00,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 18:00:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:00,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 18:00:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:00,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655148230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:00,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:00,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 18:00:00,273 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:00,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [426514887] [2022-03-20 18:00:00,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [426514887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:00,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:00,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:00:00,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466741638] [2022-03-20 18:00:00,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:00,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:00:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:00:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:00:00,275 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:00,334 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-20 18:00:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:00:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 18:00:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:00,336 INFO L225 Difference]: With dead ends: 28 [2022-03-20 18:00:00,336 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 18:00:00,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:00:00,341 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:00,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 18:00:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 18:00:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-20 18:00:00,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-03-20 18:00:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:00,347 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-20 18:00:00,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-20 18:00:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 18:00:00,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:00,348 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:00,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:00,555 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 [2022-03-20 18:00:00,555 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 7 times [2022-03-20 18:00:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114923969] [2022-03-20 18:00:00,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:00,559 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 8 times [2022-03-20 18:00:00,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:00,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921626466] [2022-03-20 18:00:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:00,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:00,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:00,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:00,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921626466] [2022-03-20 18:00:00,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921626466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756276393] [2022-03-20 18:00:00,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:00,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:00,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:00,649 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) [2022-03-20 18:00:00,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 18:00:00,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:00,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:00,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:00,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756276393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:00,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:00,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 18:00:00,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:00,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114923969] [2022-03-20 18:00:00,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114923969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:00,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:00,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:00:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210363326] [2022-03-20 18:00:00,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:00,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:00:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:00:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:00:00,846 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:00,910 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-20 18:00:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:00:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 18:00:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:00,912 INFO L225 Difference]: With dead ends: 30 [2022-03-20 18:00:00,912 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 18:00:00,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-20 18:00:00,915 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:00,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 18:00:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-20 18:00:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-03-20 18:00:00,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-03-20 18:00:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:00,924 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-03-20 18:00:00,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-03-20 18:00:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 18:00:00,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:00,925 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:00,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:01,135 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 [2022-03-20 18:00:01,135 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 9 times [2022-03-20 18:00:01,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:01,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1837449844] [2022-03-20 18:00:01,138 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:01,138 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:01,138 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 10 times [2022-03-20 18:00:01,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:01,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381355679] [2022-03-20 18:00:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:01,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:01,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381355679] [2022-03-20 18:00:01,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381355679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122481378] [2022-03-20 18:00:01,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:01,223 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) [2022-03-20 18:00:01,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 18:00:01,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 18:00:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:01,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:01,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122481378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:01,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:01,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 18:00:01,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1837449844] [2022-03-20 18:00:01,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1837449844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:01,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:01,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:00:01,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241011862] [2022-03-20 18:00:01,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:01,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 18:00:01,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 18:00:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:00:01,416 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:01,487 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-20 18:00:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:00:01,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 18:00:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:01,489 INFO L225 Difference]: With dead ends: 32 [2022-03-20 18:00:01,489 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 18:00:01,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:00:01,491 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:01,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 18:00:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-20 18:00:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-20 18:00:01,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-03-20 18:00:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:01,500 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-20 18:00:01,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-20 18:00:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 18:00:01,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:01,501 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:01,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:01,707 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 [2022-03-20 18:00:01,708 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 11 times [2022-03-20 18:00:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487381404] [2022-03-20 18:00:01,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:01,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:01,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 12 times [2022-03-20 18:00:01,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:01,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419311224] [2022-03-20 18:00:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:01,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:01,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419311224] [2022-03-20 18:00:01,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419311224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041974962] [2022-03-20 18:00:01,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:01,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:01,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:01,808 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) [2022-03-20 18:00:01,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 18:00:01,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 18:00:01,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 18:00:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:01,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:02,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041974962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:02,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:02,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 18:00:02,068 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487381404] [2022-03-20 18:00:02,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487381404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:02,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:02,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:00:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169236473] [2022-03-20 18:00:02,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:02,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:00:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:00:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:00:02,071 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:02,158 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-20 18:00:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:00:02,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 18:00:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:02,159 INFO L225 Difference]: With dead ends: 34 [2022-03-20 18:00:02,159 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 18:00:02,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:00:02,160 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:02,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 18:00:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 18:00:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-03-20 18:00:02,166 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-03-20 18:00:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:02,166 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-03-20 18:00:02,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-03-20 18:00:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 18:00:02,167 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:02,167 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:02,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 18:00:02,383 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 [2022-03-20 18:00:02,383 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 13 times [2022-03-20 18:00:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:02,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949498454] [2022-03-20 18:00:02,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:02,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 14 times [2022-03-20 18:00:02,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:02,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494252539] [2022-03-20 18:00:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:02,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:02,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:02,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:02,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494252539] [2022-03-20 18:00:02,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494252539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:02,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872565340] [2022-03-20 18:00:02,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:02,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:02,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:02,495 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) [2022-03-20 18:00:02,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 18:00:02,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:02,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 18:00:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:02,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:02,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872565340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:02,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:02,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 18:00:02,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949498454] [2022-03-20 18:00:02,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949498454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:02,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:02,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:00:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86412889] [2022-03-20 18:00:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:02,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:00:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:00:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:00:02,781 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:02,895 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-20 18:00:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:00:02,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 18:00:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:02,896 INFO L225 Difference]: With dead ends: 36 [2022-03-20 18:00:02,896 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 18:00:02,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:00:02,897 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:02,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 18:00:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-20 18:00:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-20 18:00:02,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-03-20 18:00:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:02,902 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-20 18:00:02,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-20 18:00:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 18:00:02,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:02,903 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:02,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:03,104 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 [2022-03-20 18:00:03,104 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 15 times [2022-03-20 18:00:03,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:03,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045173326] [2022-03-20 18:00:03,106 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:03,106 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 16 times [2022-03-20 18:00:03,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:03,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890283362] [2022-03-20 18:00:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:03,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:03,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:03,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:03,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890283362] [2022-03-20 18:00:03,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890283362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132569802] [2022-03-20 18:00:03,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:03,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:03,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:03,203 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) [2022-03-20 18:00:03,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 18:00:03,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:03,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:03,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 18:00:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:03,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:03,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132569802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:03,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:03,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-20 18:00:03,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:03,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045173326] [2022-03-20 18:00:03,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045173326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:03,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:03,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:00:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643398058] [2022-03-20 18:00:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:03,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:00:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:00:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:00:03,495 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:03,610 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-20 18:00:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:00:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 18:00:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:03,611 INFO L225 Difference]: With dead ends: 38 [2022-03-20 18:00:03,611 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 18:00:03,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:00:03,613 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:03,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 18:00:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-03-20 18:00:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 18:00:03,623 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-03-20 18:00:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:03,624 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 18:00:03,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 18:00:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 18:00:03,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:03,627 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:03,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:03,850 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 [2022-03-20 18:00:03,850 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 17 times [2022-03-20 18:00:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:03,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [984411058] [2022-03-20 18:00:03,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:03,852 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 18 times [2022-03-20 18:00:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920650084] [2022-03-20 18:00:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:03,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920650084] [2022-03-20 18:00:03,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920650084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218954701] [2022-03-20 18:00:03,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:03,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:03,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:03,957 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) [2022-03-20 18:00:03,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 18:00:04,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:00:04,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 18:00:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:04,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:04,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218954701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:04,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:04,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 18:00:04,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [984411058] [2022-03-20 18:00:04,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [984411058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:04,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:04,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:00:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315984533] [2022-03-20 18:00:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:04,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:00:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:00:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:00:04,354 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:04,480 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-20 18:00:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:00:04,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 18:00:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:04,481 INFO L225 Difference]: With dead ends: 40 [2022-03-20 18:00:04,481 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 18:00:04,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:00:04,482 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:04,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 18:00:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-20 18:00:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-20 18:00:04,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-03-20 18:00:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:04,488 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-20 18:00:04,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-20 18:00:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 18:00:04,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:04,489 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:04,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:04,713 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 [2022-03-20 18:00:04,713 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:04,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 19 times [2022-03-20 18:00:04,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:04,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627835380] [2022-03-20 18:00:04,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:04,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 20 times [2022-03-20 18:00:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:04,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482170070] [2022-03-20 18:00:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:04,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:04,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:04,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:04,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482170070] [2022-03-20 18:00:04,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482170070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:04,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990192209] [2022-03-20 18:00:04,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:04,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:04,824 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) [2022-03-20 18:00:04,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 18:00:04,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 18:00:04,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:04,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:05,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990192209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:05,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:05,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 18:00:05,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627835380] [2022-03-20 18:00:05,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627835380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:05,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:05,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:00:05,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812386630] [2022-03-20 18:00:05,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:05,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:00:05,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:00:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:00:05,197 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:05,349 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-20 18:00:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:00:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 18:00:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:05,350 INFO L225 Difference]: With dead ends: 42 [2022-03-20 18:00:05,350 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 18:00:05,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:00:05,351 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:05,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 18:00:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 18:00:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-03-20 18:00:05,357 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-03-20 18:00:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:05,357 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-03-20 18:00:05,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-03-20 18:00:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 18:00:05,358 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:05,358 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:05,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:05,582 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 [2022-03-20 18:00:05,582 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 21 times [2022-03-20 18:00:05,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:05,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429535590] [2022-03-20 18:00:05,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:05,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 22 times [2022-03-20 18:00:05,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:05,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155473077] [2022-03-20 18:00:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:05,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:05,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155473077] [2022-03-20 18:00:05,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155473077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:05,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212873335] [2022-03-20 18:00:05,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:05,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:05,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:05,713 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) [2022-03-20 18:00:05,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 18:00:05,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:05,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:05,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 18:00:05,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:05,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:06,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212873335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:06,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:06,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-20 18:00:06,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429535590] [2022-03-20 18:00:06,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429535590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:06,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:06,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:00:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213783955] [2022-03-20 18:00:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:06,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:00:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:00:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:00:06,096 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:06,274 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-20 18:00:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:00:06,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 18:00:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:06,275 INFO L225 Difference]: With dead ends: 44 [2022-03-20 18:00:06,275 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 18:00:06,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:00:06,279 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:06,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 18:00:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-20 18:00:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-03-20 18:00:06,288 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-03-20 18:00:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:06,288 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-03-20 18:00:06,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-03-20 18:00:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 18:00:06,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:06,289 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:06,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:06,495 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 [2022-03-20 18:00:06,496 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 23 times [2022-03-20 18:00:06,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:06,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1013838749] [2022-03-20 18:00:06,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:06,498 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 24 times [2022-03-20 18:00:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:06,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834005270] [2022-03-20 18:00:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:06,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:06,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:06,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834005270] [2022-03-20 18:00:06,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834005270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111770128] [2022-03-20 18:00:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:06,632 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) [2022-03-20 18:00:06,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 18:00:06,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 18:00:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 18:00:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:06,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:07,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111770128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:07,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:07,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 18:00:07,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1013838749] [2022-03-20 18:00:07,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1013838749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:07,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:07,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:00:07,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199926672] [2022-03-20 18:00:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:07,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:00:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:00:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:00:07,100 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:07,276 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-20 18:00:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:00:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 18:00:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:07,277 INFO L225 Difference]: With dead ends: 46 [2022-03-20 18:00:07,277 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 18:00:07,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:00:07,278 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:07,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 18:00:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-20 18:00:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-03-20 18:00:07,284 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-03-20 18:00:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:07,285 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-03-20 18:00:07,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-03-20 18:00:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 18:00:07,285 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:07,285 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:07,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 18:00:07,486 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 [2022-03-20 18:00:07,486 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 25 times [2022-03-20 18:00:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:07,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151805888] [2022-03-20 18:00:07,488 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:07,488 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:07,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 26 times [2022-03-20 18:00:07,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:07,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407324986] [2022-03-20 18:00:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:07,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:07,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:07,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407324986] [2022-03-20 18:00:07,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407324986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:07,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299925477] [2022-03-20 18:00:07,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:07,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:07,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:07,641 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) [2022-03-20 18:00:07,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 18:00:07,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:07,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 18:00:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:07,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:08,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299925477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:08,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:08,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 18:00:08,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:08,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151805888] [2022-03-20 18:00:08,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151805888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:08,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:08,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:00:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154729451] [2022-03-20 18:00:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:08,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:00:08,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:00:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:00:08,109 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:08,303 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-20 18:00:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:00:08,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 18:00:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:08,304 INFO L225 Difference]: With dead ends: 48 [2022-03-20 18:00:08,304 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 18:00:08,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:00:08,305 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:08,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 18:00:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 18:00:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-03-20 18:00:08,312 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-03-20 18:00:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:08,312 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-03-20 18:00:08,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-03-20 18:00:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 18:00:08,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:08,313 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:08,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:08,527 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 [2022-03-20 18:00:08,528 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 27 times [2022-03-20 18:00:08,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:08,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2123292739] [2022-03-20 18:00:08,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:08,530 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 28 times [2022-03-20 18:00:08,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:08,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528283047] [2022-03-20 18:00:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:08,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:08,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528283047] [2022-03-20 18:00:08,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528283047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949809382] [2022-03-20 18:00:08,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:08,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:08,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:08,701 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) [2022-03-20 18:00:08,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 18:00:08,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:08,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:08,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 18:00:08,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:08,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:09,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949809382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:09,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:09,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-20 18:00:09,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:09,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2123292739] [2022-03-20 18:00:09,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2123292739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:09,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:09,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:00:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428749053] [2022-03-20 18:00:09,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:09,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:00:09,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:00:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:00:09,172 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:09,398 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-20 18:00:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:00:09,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-20 18:00:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:09,399 INFO L225 Difference]: With dead ends: 50 [2022-03-20 18:00:09,399 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 18:00:09,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:00:09,401 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:09,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 18:00:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-20 18:00:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-03-20 18:00:09,407 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-03-20 18:00:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:09,407 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-03-20 18:00:09,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-03-20 18:00:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 18:00:09,408 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:09,408 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:09,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 18:00:09,626 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 [2022-03-20 18:00:09,626 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 29 times [2022-03-20 18:00:09,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308357272] [2022-03-20 18:00:09,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:09,628 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 30 times [2022-03-20 18:00:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149541601] [2022-03-20 18:00:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:09,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:09,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149541601] [2022-03-20 18:00:09,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149541601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:09,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617038498] [2022-03-20 18:00:09,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:09,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:09,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:09,808 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) [2022-03-20 18:00:09,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 18:00:10,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 18:00:10,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 18:00:10,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:10,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:10,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617038498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:10,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:10,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 18:00:10,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:10,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308357272] [2022-03-20 18:00:10,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308357272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:10,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:10,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:00:10,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649734657] [2022-03-20 18:00:10,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:10,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:00:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:10,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:00:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:00:10,547 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:10,765 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-20 18:00:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:00:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-20 18:00:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:10,766 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:00:10,766 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 18:00:10,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:00:10,767 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:10,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 18:00:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-20 18:00:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-20 18:00:10,776 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-03-20 18:00:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:10,776 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-20 18:00:10,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-20 18:00:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 18:00:10,777 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:10,777 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:10,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:11,003 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 [2022-03-20 18:00:11,004 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 31 times [2022-03-20 18:00:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:11,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [252826735] [2022-03-20 18:00:11,005 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:11,005 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 32 times [2022-03-20 18:00:11,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:11,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507224620] [2022-03-20 18:00:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:11,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:11,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:11,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507224620] [2022-03-20 18:00:11,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507224620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521676652] [2022-03-20 18:00:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:11,209 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) [2022-03-20 18:00:11,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 18:00:11,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:11,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 18:00:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:11,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521676652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:11,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:11,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 18:00:11,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [252826735] [2022-03-20 18:00:11,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [252826735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:11,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:11,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:00:11,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243893709] [2022-03-20 18:00:11,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:11,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:00:11,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:00:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:00:11,803 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:12,032 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-20 18:00:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:00:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 18:00:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:12,033 INFO L225 Difference]: With dead ends: 54 [2022-03-20 18:00:12,033 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 18:00:12,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:00:12,034 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:12,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 18:00:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-20 18:00:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-03-20 18:00:12,041 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-03-20 18:00:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:12,041 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-03-20 18:00:12,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-03-20 18:00:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 18:00:12,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:12,042 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:12,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:12,259 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 [2022-03-20 18:00:12,259 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 33 times [2022-03-20 18:00:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:12,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600600911] [2022-03-20 18:00:12,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:12,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 34 times [2022-03-20 18:00:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:12,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175128620] [2022-03-20 18:00:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:12,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:12,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:12,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175128620] [2022-03-20 18:00:12,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175128620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:12,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269421544] [2022-03-20 18:00:12,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:12,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:12,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:12,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:12,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 18:00:12,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 18:00:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:12,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:13,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269421544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:13,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:13,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-20 18:00:13,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600600911] [2022-03-20 18:00:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600600911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:13,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:13,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:00:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831347127] [2022-03-20 18:00:13,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:13,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:00:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:13,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:00:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:00:13,125 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:13,363 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-20 18:00:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:00:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-20 18:00:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:13,364 INFO L225 Difference]: With dead ends: 56 [2022-03-20 18:00:13,364 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 18:00:13,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:00:13,366 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:13,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 18:00:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 18:00:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-03-20 18:00:13,372 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-03-20 18:00:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:13,372 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-03-20 18:00:13,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-03-20 18:00:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 18:00:13,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:13,372 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:13,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:13,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:13,573 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 35 times [2022-03-20 18:00:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094983973] [2022-03-20 18:00:13,575 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:13,575 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 36 times [2022-03-20 18:00:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731054718] [2022-03-20 18:00:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:13,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:13,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:13,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:13,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731054718] [2022-03-20 18:00:13,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731054718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:13,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455169366] [2022-03-20 18:00:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:13,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:13,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:13,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:13,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 18:00:14,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 18:00:14,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:14,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 18:00:14,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:14,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:14,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455169366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:14,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:14,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 18:00:14,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:14,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094983973] [2022-03-20 18:00:14,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094983973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:14,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:14,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:00:14,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395706091] [2022-03-20 18:00:14,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:14,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:00:14,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:14,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:00:14,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:00:14,664 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:14,944 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-20 18:00:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:00:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-20 18:00:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:14,946 INFO L225 Difference]: With dead ends: 58 [2022-03-20 18:00:14,946 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 18:00:14,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:00:14,947 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:14,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 18:00:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-20 18:00:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-20 18:00:14,953 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-03-20 18:00:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:14,954 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-20 18:00:14,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-20 18:00:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 18:00:14,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:14,954 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:14,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:15,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:15,168 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 37 times [2022-03-20 18:00:15,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:15,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413751345] [2022-03-20 18:00:15,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:15,169 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 38 times [2022-03-20 18:00:15,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:15,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50223839] [2022-03-20 18:00:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:15,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:15,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:15,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:15,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50223839] [2022-03-20 18:00:15,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50223839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:15,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897164659] [2022-03-20 18:00:15,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:15,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:15,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:15,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:15,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 18:00:15,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:15,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 18:00:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:16,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897164659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:16,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:16,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 18:00:16,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:16,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413751345] [2022-03-20 18:00:16,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413751345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:16,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:16,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:00:16,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846555687] [2022-03-20 18:00:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:16,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:00:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:00:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:00:16,118 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:16,410 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-20 18:00:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:00:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-20 18:00:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:16,411 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:00:16,411 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 18:00:16,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:00:16,412 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:16,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 39 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 18:00:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 18:00:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-03-20 18:00:16,419 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-03-20 18:00:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:16,420 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-03-20 18:00:16,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-03-20 18:00:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 18:00:16,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:16,420 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:16,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 18:00:16,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:16,623 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:16,624 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 39 times [2022-03-20 18:00:16,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:16,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1389275644] [2022-03-20 18:00:16,625 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:16,625 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 40 times [2022-03-20 18:00:16,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:16,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406433996] [2022-03-20 18:00:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:16,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:16,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:16,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:16,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406433996] [2022-03-20 18:00:16,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406433996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:16,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914186280] [2022-03-20 18:00:16,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:16,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:16,868 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:16,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 18:00:16,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:16,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:16,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 18:00:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:17,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:17,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914186280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:17,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:17,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-20 18:00:17,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1389275644] [2022-03-20 18:00:17,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1389275644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:17,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:17,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:00:17,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611160567] [2022-03-20 18:00:17,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:17,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:00:17,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:00:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:00:17,657 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:17,957 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-20 18:00:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:00:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-20 18:00:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:17,959 INFO L225 Difference]: With dead ends: 62 [2022-03-20 18:00:17,959 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 18:00:17,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:00:17,961 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:17,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 18:00:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 18:00:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-03-20 18:00:17,967 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-03-20 18:00:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:17,968 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-03-20 18:00:17,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-03-20 18:00:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 18:00:17,968 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:17,968 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:17,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 18:00:18,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 18:00:18,169 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 41 times [2022-03-20 18:00:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:18,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909584028] [2022-03-20 18:00:18,170 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:18,171 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 42 times [2022-03-20 18:00:18,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:18,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066392937] [2022-03-20 18:00:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:18,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:18,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:18,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066392937] [2022-03-20 18:00:18,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066392937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204517630] [2022-03-20 18:00:18,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:18,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:18,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:18,440 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:18,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 18:00:19,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 18:00:19,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:19,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 18:00:19,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:19,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:20,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204517630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:20,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:20,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 18:00:20,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909584028] [2022-03-20 18:00:20,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909584028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:20,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:20,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:00:20,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797659600] [2022-03-20 18:00:20,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:20,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:00:20,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:20,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:00:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:00:20,038 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:20,358 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-20 18:00:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:00:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-20 18:00:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:20,359 INFO L225 Difference]: With dead ends: 64 [2022-03-20 18:00:20,359 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 18:00:20,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:00:20,360 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:20,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 18:00:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-20 18:00:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-03-20 18:00:20,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-03-20 18:00:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:20,367 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-03-20 18:00:20,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-03-20 18:00:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 18:00:20,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:20,368 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:20,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 18:00:20,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 18:00:20,569 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:20,569 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 43 times [2022-03-20 18:00:20,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:20,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2382010] [2022-03-20 18:00:20,570 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:20,570 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 44 times [2022-03-20 18:00:20,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:20,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186443747] [2022-03-20 18:00:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:20,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:20,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:20,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:20,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186443747] [2022-03-20 18:00:20,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186443747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:20,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522747905] [2022-03-20 18:00:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:20,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:20,844 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:20,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 18:00:20,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:20,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 18:00:20,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:21,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:21,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522747905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:21,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:21,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 18:00:21,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:21,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2382010] [2022-03-20 18:00:21,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2382010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:21,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:21,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:00:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128446854] [2022-03-20 18:00:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:21,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:00:21,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:00:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:00:21,683 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:22,025 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-20 18:00:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:00:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 18:00:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:22,026 INFO L225 Difference]: With dead ends: 66 [2022-03-20 18:00:22,026 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 18:00:22,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:00:22,027 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:22,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 18:00:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 18:00:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-20 18:00:22,034 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-03-20 18:00:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:22,034 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-20 18:00:22,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-20 18:00:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 18:00:22,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:22,035 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:22,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 18:00:22,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:22,236 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 45 times [2022-03-20 18:00:22,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:22,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696339759] [2022-03-20 18:00:22,238 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:22,238 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 46 times [2022-03-20 18:00:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:22,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157554392] [2022-03-20 18:00:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:22,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:22,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:22,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:22,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157554392] [2022-03-20 18:00:22,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157554392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:22,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599688440] [2022-03-20 18:00:22,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:22,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:22,508 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:22,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 18:00:22,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:22,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:22,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 18:00:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:22,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:23,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599688440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:23,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:23,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-20 18:00:23,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696339759] [2022-03-20 18:00:23,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696339759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:23,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:23,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:00:23,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088878239] [2022-03-20 18:00:23,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:23,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:00:23,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:23,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:00:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:00:23,406 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:23,766 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-20 18:00:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:00:23,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-20 18:00:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:23,767 INFO L225 Difference]: With dead ends: 68 [2022-03-20 18:00:23,767 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 18:00:23,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:00:23,768 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:23,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 39 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 18:00:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-03-20 18:00:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-03-20 18:00:23,777 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-03-20 18:00:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:23,777 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-03-20 18:00:23,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-03-20 18:00:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 18:00:23,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:23,778 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:23,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:23,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:23,991 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 47 times [2022-03-20 18:00:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:23,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277991290] [2022-03-20 18:00:23,993 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:23,993 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 48 times [2022-03-20 18:00:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:23,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323318729] [2022-03-20 18:00:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:24,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323318729] [2022-03-20 18:00:24,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323318729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594804922] [2022-03-20 18:00:24,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:24,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:24,302 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:24,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 18:00:25,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 18:00:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:25,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 18:00:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:25,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:26,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594804922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:26,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:26,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 18:00:26,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:26,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277991290] [2022-03-20 18:00:26,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277991290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:26,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:26,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:00:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857193833] [2022-03-20 18:00:26,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:26,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:00:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:00:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:00:26,642 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:27,016 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-20 18:00:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:00:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-20 18:00:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:27,017 INFO L225 Difference]: With dead ends: 70 [2022-03-20 18:00:27,017 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 18:00:27,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:00:27,019 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:27,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 18:00:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 18:00:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-03-20 18:00:27,029 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-03-20 18:00:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:27,029 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-03-20 18:00:27,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-03-20 18:00:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 18:00:27,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:27,030 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:27,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:27,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 18:00:27,255 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 49 times [2022-03-20 18:00:27,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:27,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413520811] [2022-03-20 18:00:27,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:27,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 50 times [2022-03-20 18:00:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:27,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413905404] [2022-03-20 18:00:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:27,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:27,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:27,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413905404] [2022-03-20 18:00:27,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413905404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:27,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809226188] [2022-03-20 18:00:27,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:27,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:27,585 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:27,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 18:00:27,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:27,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 18:00:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:27,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:28,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809226188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:28,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:28,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 18:00:28,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413520811] [2022-03-20 18:00:28,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413520811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:28,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:28,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:00:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262347760] [2022-03-20 18:00:28,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:28,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:00:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:00:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:00:28,533 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:28,917 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-20 18:00:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:00:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 18:00:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:28,918 INFO L225 Difference]: With dead ends: 72 [2022-03-20 18:00:28,918 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 18:00:28,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:00:28,919 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:28,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 34 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 18:00:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-03-20 18:00:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-03-20 18:00:28,927 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-03-20 18:00:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:28,927 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-03-20 18:00:28,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-03-20 18:00:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 18:00:28,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:28,928 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:28,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:29,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 18:00:29,129 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 51 times [2022-03-20 18:00:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:29,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889743754] [2022-03-20 18:00:29,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:29,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 52 times [2022-03-20 18:00:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:29,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274473672] [2022-03-20 18:00:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:29,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:29,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274473672] [2022-03-20 18:00:29,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274473672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836532627] [2022-03-20 18:00:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:29,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:29,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:29,457 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:29,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 18:00:29,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 18:00:29,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:29,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:30,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836532627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:30,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:30,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-20 18:00:30,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:30,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889743754] [2022-03-20 18:00:30,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889743754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:30,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:30,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:00:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581010618] [2022-03-20 18:00:30,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:30,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:00:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:30,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:00:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:00:30,480 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:30,893 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-20 18:00:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:00:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-20 18:00:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:30,894 INFO L225 Difference]: With dead ends: 74 [2022-03-20 18:00:30,894 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 18:00:30,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:00:30,896 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:30,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 18:00:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-03-20 18:00:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-03-20 18:00:30,904 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-03-20 18:00:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:30,904 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-03-20 18:00:30,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-03-20 18:00:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 18:00:30,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:30,904 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:30,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 18:00:31,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 18:00:31,105 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 53 times [2022-03-20 18:00:31,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:31,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1060865844] [2022-03-20 18:00:31,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:31,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 54 times [2022-03-20 18:00:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:31,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171626914] [2022-03-20 18:00:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:31,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:31,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:31,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:31,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171626914] [2022-03-20 18:00:31,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171626914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:31,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142686071] [2022-03-20 18:00:31,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:31,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:31,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:31,540 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:31,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 18:00:33,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 18:00:33,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 18:00:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:33,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:34,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142686071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:34,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:34,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 18:00:34,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:34,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1060865844] [2022-03-20 18:00:34,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1060865844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:34,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:34,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:00:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945235349] [2022-03-20 18:00:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:34,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:00:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:00:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:00:34,491 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:34,909 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-20 18:00:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:00:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-20 18:00:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:34,910 INFO L225 Difference]: With dead ends: 76 [2022-03-20 18:00:34,910 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 18:00:34,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:00:34,912 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:34,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 18:00:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-20 18:00:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-20 18:00:34,922 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-03-20 18:00:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:34,923 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-20 18:00:34,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-20 18:00:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 18:00:34,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:34,924 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:34,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 18:00:35,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 18:00:35,139 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 55 times [2022-03-20 18:00:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [648555444] [2022-03-20 18:00:35,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:35,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 56 times [2022-03-20 18:00:35,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:35,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877961935] [2022-03-20 18:00:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:35,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:35,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:35,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877961935] [2022-03-20 18:00:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877961935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705488838] [2022-03-20 18:00:35,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:35,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:35,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:35,489 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:35,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 18:00:35,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:35,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 18:00:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:35,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:36,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705488838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:36,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:36,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 18:00:36,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [648555444] [2022-03-20 18:00:36,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [648555444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:36,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:36,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:00:36,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883319041] [2022-03-20 18:00:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:36,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:00:36,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:00:36,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:00:36,720 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:37,200 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-20 18:00:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:00:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 18:00:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:37,201 INFO L225 Difference]: With dead ends: 78 [2022-03-20 18:00:37,202 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 18:00:37,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 18:00:37,203 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:37,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 18:00:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 18:00:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-03-20 18:00:37,214 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-03-20 18:00:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:37,215 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-03-20 18:00:37,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-03-20 18:00:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 18:00:37,216 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:37,216 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:37,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:37,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:37,440 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 57 times [2022-03-20 18:00:37,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:37,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [809018342] [2022-03-20 18:00:37,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:37,442 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 58 times [2022-03-20 18:00:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:37,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551078312] [2022-03-20 18:00:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:37,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:37,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:37,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551078312] [2022-03-20 18:00:37,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551078312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:37,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990950973] [2022-03-20 18:00:37,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:37,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:37,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:37,887 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:37,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 18:00:38,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:38,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:38,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 18:00:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:38,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:39,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990950973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:39,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:39,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 18:00:39,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:39,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [809018342] [2022-03-20 18:00:39,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [809018342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:39,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:39,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:00:39,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640372326] [2022-03-20 18:00:39,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:39,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:00:39,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:00:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:00:39,102 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:39,604 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-20 18:00:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:00:39,605 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-20 18:00:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:39,605 INFO L225 Difference]: With dead ends: 80 [2022-03-20 18:00:39,605 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 18:00:39,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:00:39,607 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:39,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 18:00:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-03-20 18:00:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-03-20 18:00:39,618 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-03-20 18:00:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:39,618 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-03-20 18:00:39,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-03-20 18:00:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 18:00:39,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:39,619 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:39,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:39,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:39,823 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:39,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 59 times [2022-03-20 18:00:39,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:39,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [876826600] [2022-03-20 18:00:39,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:39,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 60 times [2022-03-20 18:00:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:39,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739813974] [2022-03-20 18:00:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:40,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:40,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739813974] [2022-03-20 18:00:40,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739813974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207458838] [2022-03-20 18:00:40,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:40,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:40,242 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:40,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 18:00:44,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 18:00:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 18:00:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:44,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207458838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:45,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:45,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 18:00:45,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [876826600] [2022-03-20 18:00:45,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [876826600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:45,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:45,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:00:45,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155752144] [2022-03-20 18:00:45,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:45,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:00:45,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:00:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:00:45,456 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:46,010 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-20 18:00:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:00:46,010 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 18:00:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:46,011 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:00:46,011 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 18:00:46,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 18:00:46,013 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:46,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 29 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 18:00:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-03-20 18:00:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-03-20 18:00:46,028 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-03-20 18:00:46,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:46,028 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-03-20 18:00:46,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-03-20 18:00:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 18:00:46,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:46,029 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:46,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:46,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 18:00:46,236 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 61 times [2022-03-20 18:00:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:46,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41099482] [2022-03-20 18:00:46,238 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:46,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 62 times [2022-03-20 18:00:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:46,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028870930] [2022-03-20 18:00:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:46,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:46,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:46,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:46,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028870930] [2022-03-20 18:00:46,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028870930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:46,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753293003] [2022-03-20 18:00:46,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:46,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:46,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:46,676 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:46,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 18:00:46,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:46,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 18:00:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:46,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:48,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753293003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:48,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:48,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 18:00:48,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41099482] [2022-03-20 18:00:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41099482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:48,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:48,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:00:48,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861272365] [2022-03-20 18:00:48,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:48,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:00:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:00:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:00:48,049 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:48,615 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-20 18:00:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:00:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-20 18:00:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:48,616 INFO L225 Difference]: With dead ends: 84 [2022-03-20 18:00:48,616 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 18:00:48,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:00:48,617 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:48,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 18:00:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-03-20 18:00:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-03-20 18:00:48,627 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-03-20 18:00:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:48,627 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-03-20 18:00:48,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-03-20 18:00:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 18:00:48,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:48,628 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:48,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 18:00:48,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:48,847 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 63 times [2022-03-20 18:00:48,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:48,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165908520] [2022-03-20 18:00:48,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:48,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 64 times [2022-03-20 18:00:48,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:48,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533775204] [2022-03-20 18:00:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:49,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:49,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:49,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533775204] [2022-03-20 18:00:49,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533775204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:49,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710833507] [2022-03-20 18:00:49,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:49,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:49,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:49,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:49,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 18:00:49,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:49,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:49,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 18:00:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:49,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:50,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710833507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:50,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:50,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 18:00:50,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:50,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165908520] [2022-03-20 18:00:50,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165908520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:50,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:50,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:00:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529378482] [2022-03-20 18:00:50,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:50,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:00:50,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:00:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:00:50,799 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:51,353 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-20 18:00:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:00:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-20 18:00:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:51,354 INFO L225 Difference]: With dead ends: 86 [2022-03-20 18:00:51,354 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 18:00:51,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 18:00:51,356 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:51,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 18:00:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-20 18:00:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-20 18:00:51,382 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-03-20 18:00:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:51,382 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-20 18:00:51,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-20 18:00:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 18:00:51,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:51,383 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:51,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:51,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:51,591 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 65 times [2022-03-20 18:00:51,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:51,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992420498] [2022-03-20 18:00:51,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:51,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 66 times [2022-03-20 18:00:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:51,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568521994] [2022-03-20 18:00:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:52,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:52,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568521994] [2022-03-20 18:00:52,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568521994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374224703] [2022-03-20 18:00:52,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:52,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:52,097 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:52,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 18:00:55,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 18:00:55,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:55,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 18:00:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:55,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374224703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:56,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:56,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-20 18:00:56,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992420498] [2022-03-20 18:00:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992420498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:56,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:56,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:00:56,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710476561] [2022-03-20 18:00:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:57,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:00:57,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:57,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:00:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:00:57,000 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:57,601 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-20 18:00:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:00:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-20 18:00:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:57,602 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:00:57,602 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 18:00:57,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:00:57,604 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:57,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 34 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 18:00:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-03-20 18:00:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-03-20 18:00:57,614 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-03-20 18:00:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:57,614 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-03-20 18:00:57,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-03-20 18:00:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 18:00:57,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:57,615 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:57,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:57,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 18:00:57,815 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 67 times [2022-03-20 18:00:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:57,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846281897] [2022-03-20 18:00:57,817 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:57,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:57,818 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 68 times [2022-03-20 18:00:57,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:57,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134523325] [2022-03-20 18:00:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:57,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:58,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134523325] [2022-03-20 18:00:58,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134523325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:58,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988446651] [2022-03-20 18:00:58,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:58,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:58,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:58,326 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:58,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 18:00:58,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:58,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:58,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 18:00:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:58,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:59,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988446651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:59,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:59,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 18:00:59,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:59,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846281897] [2022-03-20 18:00:59,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846281897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:59,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:59,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:00:59,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279749726] [2022-03-20 18:00:59,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:59,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:00:59,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:00:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:00:59,905 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:00,519 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-20 18:01:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:01:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 18:01:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:00,520 INFO L225 Difference]: With dead ends: 90 [2022-03-20 18:01:00,520 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 18:01:00,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 18:01:00,522 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:00,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 18:01:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-03-20 18:01:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-03-20 18:01:00,534 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-03-20 18:01:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:00,534 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-03-20 18:01:00,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-03-20 18:01:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 18:01:00,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:00,534 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:00,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:00,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 18:01:00,745 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 69 times [2022-03-20 18:01:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:00,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752581045] [2022-03-20 18:01:00,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:00,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 70 times [2022-03-20 18:01:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912156046] [2022-03-20 18:01:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:01,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912156046] [2022-03-20 18:01:01,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912156046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677977802] [2022-03-20 18:01:01,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:01,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:01,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:01,265 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:01,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 18:01:01,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:01,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 18:01:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:01,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:02,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677977802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:02,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:02,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-20 18:01:02,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752581045] [2022-03-20 18:01:02,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752581045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:02,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:02,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:01:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912341329] [2022-03-20 18:01:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:02,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:01:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:01:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:01:02,929 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:03,569 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-20 18:01:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:01:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-20 18:01:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:03,569 INFO L225 Difference]: With dead ends: 92 [2022-03-20 18:01:03,570 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 18:01:03,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 18:01:03,571 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:03,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 34 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 18:01:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-03-20 18:01:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-03-20 18:01:03,585 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-03-20 18:01:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:03,586 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-03-20 18:01:03,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-03-20 18:01:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 18:01:03,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:03,586 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:03,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 18:01:03,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 18:01:03,791 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:03,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 71 times [2022-03-20 18:01:03,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:03,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371013777] [2022-03-20 18:01:03,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:03,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:03,793 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 72 times [2022-03-20 18:01:03,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:03,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548019129] [2022-03-20 18:01:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:03,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:04,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:04,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548019129] [2022-03-20 18:01:04,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548019129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:04,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431622075] [2022-03-20 18:01:04,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:04,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:04,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:04,352 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:04,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 18:01:11,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 18:01:11,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 18:01:11,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:12,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431622075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:12,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:12,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-20 18:01:12,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:12,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371013777] [2022-03-20 18:01:12,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371013777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:12,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:12,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:01:12,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675088870] [2022-03-20 18:01:12,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:12,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:01:12,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:01:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:01:12,716 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:13,410 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-20 18:01:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:01:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-20 18:01:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:13,411 INFO L225 Difference]: With dead ends: 94 [2022-03-20 18:01:13,411 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 18:01:13,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:01:13,413 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:13,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 34 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 18:01:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-03-20 18:01:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-03-20 18:01:13,424 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-03-20 18:01:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:13,425 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-03-20 18:01:13,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-03-20 18:01:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 18:01:13,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:13,425 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:13,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 18:01:13,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:13,626 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:13,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 73 times [2022-03-20 18:01:13,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:13,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2066114149] [2022-03-20 18:01:13,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:13,628 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 74 times [2022-03-20 18:01:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733866964] [2022-03-20 18:01:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:13,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:14,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:14,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733866964] [2022-03-20 18:01:14,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733866964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074774555] [2022-03-20 18:01:14,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:14,235 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:14,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 18:01:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:01:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:14,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:16,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074774555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:16,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:16,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 18:01:16,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:16,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2066114149] [2022-03-20 18:01:16,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2066114149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:16,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:16,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:01:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935813469] [2022-03-20 18:01:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:16,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:01:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:01:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:01:16,094 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:16,821 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-20 18:01:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:01:16,821 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-20 18:01:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:16,822 INFO L225 Difference]: With dead ends: 96 [2022-03-20 18:01:16,822 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 18:01:16,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:01:16,823 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:16,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 18:01:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-20 18:01:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-20 18:01:16,836 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-03-20 18:01:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:16,836 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-20 18:01:16,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-20 18:01:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 18:01:16,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:16,836 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:16,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 18:01:17,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 18:01:17,037 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:17,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 75 times [2022-03-20 18:01:17,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:17,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1813980572] [2022-03-20 18:01:17,039 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:17,039 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 76 times [2022-03-20 18:01:17,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:17,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762210999] [2022-03-20 18:01:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:17,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:17,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762210999] [2022-03-20 18:01:17,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762210999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:17,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776416911] [2022-03-20 18:01:17,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:17,653 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:17,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 18:01:17,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:17,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 18:01:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:18,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:19,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776416911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:19,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:19,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-20 18:01:19,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1813980572] [2022-03-20 18:01:19,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1813980572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:19,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:19,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:01:19,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903237356] [2022-03-20 18:01:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:19,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:01:19,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:01:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:01:19,605 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:20,348 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-20 18:01:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:01:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-20 18:01:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:20,349 INFO L225 Difference]: With dead ends: 98 [2022-03-20 18:01:20,349 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 18:01:20,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 18:01:20,351 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:20,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 18:01:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-03-20 18:01:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-20 18:01:20,363 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-03-20 18:01:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:20,363 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-20 18:01:20,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-20 18:01:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 18:01:20,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:20,364 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:20,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:20,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 18:01:20,564 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 77 times [2022-03-20 18:01:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1669447422] [2022-03-20 18:01:20,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:20,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 78 times [2022-03-20 18:01:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:20,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892992266] [2022-03-20 18:01:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:21,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:21,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:21,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892992266] [2022-03-20 18:01:21,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892992266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:21,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689625633] [2022-03-20 18:01:21,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:21,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:21,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:21,234 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:21,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 18:01:31,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-20 18:01:31,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:31,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:01:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:31,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:33,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689625633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:33,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:33,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-20 18:01:33,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:33,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1669447422] [2022-03-20 18:01:33,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1669447422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:33,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:33,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:01:33,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487375145] [2022-03-20 18:01:33,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:33,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:01:33,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:33,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:01:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:01:33,400 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:34,183 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-20 18:01:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:01:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-20 18:01:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:34,184 INFO L225 Difference]: With dead ends: 100 [2022-03-20 18:01:34,184 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 18:01:34,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:01:34,186 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:34,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 18:01:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-03-20 18:01:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-03-20 18:01:34,200 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-03-20 18:01:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:34,200 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-03-20 18:01:34,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-03-20 18:01:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 18:01:34,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:34,201 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:34,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:34,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:34,407 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 79 times [2022-03-20 18:01:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:34,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1549321456] [2022-03-20 18:01:34,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:34,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 80 times [2022-03-20 18:01:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001726597] [2022-03-20 18:01:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:35,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:35,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:35,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001726597] [2022-03-20 18:01:35,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001726597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:35,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947501703] [2022-03-20 18:01:35,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:35,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:35,093 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:35,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 18:01:35,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:35,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 18:01:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:37,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947501703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:37,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:37,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 18:01:37,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1549321456] [2022-03-20 18:01:37,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1549321456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:37,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:37,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 18:01:37,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931248412] [2022-03-20 18:01:37,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:37,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:01:37,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:37,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:01:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:01:37,340 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:38,224 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-20 18:01:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:01:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-20 18:01:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:38,225 INFO L225 Difference]: With dead ends: 102 [2022-03-20 18:01:38,225 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 18:01:38,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 18:01:38,227 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:38,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 18:01:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-03-20 18:01:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-03-20 18:01:38,243 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-03-20 18:01:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:38,243 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-03-20 18:01:38,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-03-20 18:01:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 18:01:38,243 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:38,243 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:38,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 18:01:38,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 18:01:38,444 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:38,445 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 81 times [2022-03-20 18:01:38,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:38,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2038241466] [2022-03-20 18:01:38,447 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:38,447 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 82 times [2022-03-20 18:01:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292594562] [2022-03-20 18:01:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:39,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:39,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292594562] [2022-03-20 18:01:39,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292594562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512859788] [2022-03-20 18:01:39,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:39,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:39,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:39,180 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:39,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 18:01:39,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:39,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:39,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 18:01:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:39,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:41,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512859788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:41,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:41,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-20 18:01:41,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2038241466] [2022-03-20 18:01:41,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2038241466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:41,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:41,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:01:41,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675862426] [2022-03-20 18:01:41,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:41,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:01:41,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:01:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:01:41,376 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:42,229 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-20 18:01:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:01:42,229 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-20 18:01:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:42,230 INFO L225 Difference]: With dead ends: 104 [2022-03-20 18:01:42,230 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 18:01:42,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 18:01:42,232 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:42,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 18:01:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-20 18:01:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-03-20 18:01:42,249 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-03-20 18:01:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:42,250 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-03-20 18:01:42,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-03-20 18:01:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 18:01:42,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:42,250 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:42,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-20 18:01:42,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:42,463 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 83 times [2022-03-20 18:01:42,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:42,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1632024822] [2022-03-20 18:01:42,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:42,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:42,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 84 times [2022-03-20 18:01:42,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:42,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691873489] [2022-03-20 18:01:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:42,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:43,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:43,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691873489] [2022-03-20 18:01:43,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691873489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:43,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478505468] [2022-03-20 18:01:43,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:43,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:43,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:43,181 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:43,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 18:01:59,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-20 18:01:59,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:59,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 18:01:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:59,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:01,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478505468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:01,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:01,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-20 18:02:01,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:01,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1632024822] [2022-03-20 18:02:01,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1632024822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:01,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:01,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 18:02:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961769751] [2022-03-20 18:02:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:01,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:02:01,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:01,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:02:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:02:01,814 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:02,702 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-20 18:02:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 18:02:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 18:02:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:02,704 INFO L225 Difference]: With dead ends: 106 [2022-03-20 18:02:02,704 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 18:02:02,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 18:02:02,706 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:02,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:02:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 18:02:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-20 18:02:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-20 18:02:02,728 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-03-20 18:02:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:02,728 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-20 18:02:02,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-20 18:02:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 18:02:02,729 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:02,729 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:02,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 18:02:02,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:02,944 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 85 times [2022-03-20 18:02:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1736557738] [2022-03-20 18:02:02,946 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:02,946 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 86 times [2022-03-20 18:02:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251613225] [2022-03-20 18:02:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:03,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:03,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:03,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251613225] [2022-03-20 18:02:03,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251613225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922144209] [2022-03-20 18:02:03,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:03,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:03,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:03,688 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:03,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 18:02:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 18:02:03,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:04,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:06,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922144209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:06,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:06,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 18:02:06,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1736557738] [2022-03-20 18:02:06,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1736557738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:06,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:06,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:02:06,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778540110] [2022-03-20 18:02:06,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:06,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:02:06,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:02:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:02:06,076 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:07,045 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-20 18:02:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:02:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-20 18:02:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:07,046 INFO L225 Difference]: With dead ends: 108 [2022-03-20 18:02:07,046 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 18:02:07,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 18:02:07,047 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:07,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 44 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:02:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 18:02:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-03-20 18:02:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-03-20 18:02:07,069 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-03-20 18:02:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:07,069 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-03-20 18:02:07,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-03-20 18:02:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 18:02:07,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:07,070 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:07,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 18:02:07,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 18:02:07,273 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 87 times [2022-03-20 18:02:07,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:07,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350640082] [2022-03-20 18:02:07,276 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:07,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 88 times [2022-03-20 18:02:07,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:07,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839549969] [2022-03-20 18:02:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:07,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:08,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839549969] [2022-03-20 18:02:08,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839549969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740777239] [2022-03-20 18:02:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:08,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:08,057 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:08,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 18:02:08,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:08,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:08,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 18:02:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:08,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:10,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740777239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:10,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:10,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-20 18:02:10,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:10,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350640082] [2022-03-20 18:02:10,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350640082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:10,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:10,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:02:10,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382530031] [2022-03-20 18:02:10,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:10,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:02:10,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:10,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:02:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:02:10,500 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:11,463 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-20 18:02:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:02:11,463 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-20 18:02:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:11,464 INFO L225 Difference]: With dead ends: 110 [2022-03-20 18:02:11,464 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 18:02:11,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 18:02:11,466 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:11,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 39 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:02:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 18:02:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-03-20 18:02:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-03-20 18:02:11,489 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-03-20 18:02:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:11,489 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-03-20 18:02:11,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-03-20 18:02:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:02:11,490 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:11,490 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:11,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:11,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 18:02:11,715 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:11,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 89 times [2022-03-20 18:02:11,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:11,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1087666069] [2022-03-20 18:02:11,718 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:11,718 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 90 times [2022-03-20 18:02:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:11,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616736090] [2022-03-20 18:02:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:12,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:12,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616736090] [2022-03-20 18:02:12,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616736090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355503890] [2022-03-20 18:02:12,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:12,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:12,511 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:12,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 18:02:33,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-20 18:02:33,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 18:02:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:34,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:36,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355503890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:36,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:36,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 18:02:36,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:36,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1087666069] [2022-03-20 18:02:36,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1087666069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:36,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:36,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:02:36,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213007460] [2022-03-20 18:02:36,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:36,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:02:36,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:02:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:02:36,172 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:37,159 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-20 18:02:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:02:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:02:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:37,160 INFO L225 Difference]: With dead ends: 112 [2022-03-20 18:02:37,160 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 18:02:37,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 18:02:37,161 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:37,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 44 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:02:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 18:02:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-03-20 18:02:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-03-20 18:02:37,186 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-03-20 18:02:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:37,186 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-03-20 18:02:37,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-03-20 18:02:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 18:02:37,187 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:37,187 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:37,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:37,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 18:02:37,403 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 91 times [2022-03-20 18:02:37,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:37,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [695834269] [2022-03-20 18:02:37,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:37,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:37,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 92 times [2022-03-20 18:02:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591897607] [2022-03-20 18:02:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:37,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:38,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:38,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591897607] [2022-03-20 18:02:38,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591897607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954204417] [2022-03-20 18:02:38,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:38,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:38,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:38,251 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:38,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 18:02:38,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:38,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 18:02:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:38,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:40,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954204417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:40,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:40,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 18:02:40,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:40,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [695834269] [2022-03-20 18:02:40,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [695834269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:40,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:40,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 18:02:40,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158191367] [2022-03-20 18:02:40,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:40,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 18:02:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:40,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 18:02:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 18:02:40,995 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:42,014 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-20 18:02:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 18:02:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-20 18:02:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:42,015 INFO L225 Difference]: With dead ends: 114 [2022-03-20 18:02:42,015 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 18:02:42,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 18:02:42,017 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:42,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 39 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:02:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 18:02:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-20 18:02:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-03-20 18:02:42,036 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-03-20 18:02:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:42,036 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-03-20 18:02:42,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-03-20 18:02:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 18:02:42,037 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:42,037 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:42,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-20 18:02:42,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:42,238 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 93 times [2022-03-20 18:02:42,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:42,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274900770] [2022-03-20 18:02:42,240 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:42,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 94 times [2022-03-20 18:02:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869862109] [2022-03-20 18:02:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:43,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:43,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:43,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869862109] [2022-03-20 18:02:43,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869862109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:43,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790621520] [2022-03-20 18:02:43,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:43,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:43,150 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:43,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 18:02:43,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:43,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:43,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 18:02:43,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:43,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:45,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790621520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:45,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:45,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-20 18:02:45,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:45,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274900770] [2022-03-20 18:02:45,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274900770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:45,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:45,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:02:45,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363935808] [2022-03-20 18:02:45,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:45,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 18:02:45,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 18:02:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:02:45,923 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:47,017 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-20 18:02:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 18:02:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-03-20 18:02:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:47,020 INFO L225 Difference]: With dead ends: 116 [2022-03-20 18:02:47,020 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 18:02:47,022 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 18:02:47,022 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:47,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 24 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:02:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 18:02:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-20 18:02:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-20 18:02:47,047 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-03-20 18:02:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:47,047 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-20 18:02:47,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-20 18:02:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 18:02:47,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:47,048 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:47,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:47,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 18:02:47,264 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 95 times [2022-03-20 18:02:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:47,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581597809] [2022-03-20 18:02:47,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:47,266 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:47,266 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 96 times [2022-03-20 18:02:47,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:47,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504412016] [2022-03-20 18:02:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:02:48,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:48,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504412016] [2022-03-20 18:02:48,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504412016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:48,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577798533] [2022-03-20 18:02:48,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:48,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:48,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:48,260 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:48,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 18:03:24,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-20 18:03:24,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 18:03:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:24,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:26,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577798533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:26,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:26,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 18:03:26,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:26,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581597809] [2022-03-20 18:03:26,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581597809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:26,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:26,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 18:03:26,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024254763] [2022-03-20 18:03:26,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:26,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 18:03:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 18:03:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 18:03:26,832 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:27,918 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-20 18:03:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 18:03:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-03-20 18:03:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:27,919 INFO L225 Difference]: With dead ends: 118 [2022-03-20 18:03:27,919 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 18:03:27,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 18:03:27,920 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:27,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 39 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:03:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 18:03:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-03-20 18:03:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-03-20 18:03:27,942 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2022-03-20 18:03:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:27,943 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-03-20 18:03:27,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-03-20 18:03:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 18:03:27,943 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:27,944 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:27,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 18:03:28,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 18:03:28,148 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 97 times [2022-03-20 18:03:28,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:28,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [602296552] [2022-03-20 18:03:28,150 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:28,150 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:28,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 98 times [2022-03-20 18:03:28,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:28,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92452216] [2022-03-20 18:03:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:29,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:29,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92452216] [2022-03-20 18:03:29,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92452216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166434565] [2022-03-20 18:03:29,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:03:29,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:29,047 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:29,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 18:03:29,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:03:29,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 18:03:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:29,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:32,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166434565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:32,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:32,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 18:03:32,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [602296552] [2022-03-20 18:03:32,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [602296552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:32,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:32,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:03:32,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243556072] [2022-03-20 18:03:32,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:32,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:03:32,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:03:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:03:32,032 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:33,180 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-20 18:03:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:03:33,180 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-03-20 18:03:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:33,181 INFO L225 Difference]: With dead ends: 120 [2022-03-20 18:03:33,181 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 18:03:33,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 18:03:33,183 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:33,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 34 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:03:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 18:03:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-03-20 18:03:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-03-20 18:03:33,210 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2022-03-20 18:03:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:33,210 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-03-20 18:03:33,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-03-20 18:03:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-20 18:03:33,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:33,211 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:33,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:33,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:33,413 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:33,413 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 99 times [2022-03-20 18:03:33,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:33,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858527575] [2022-03-20 18:03:33,415 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:33,415 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 100 times [2022-03-20 18:03:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:33,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493663304] [2022-03-20 18:03:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:34,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:34,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:34,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493663304] [2022-03-20 18:03:34,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493663304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:34,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715152352] [2022-03-20 18:03:34,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:03:34,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:34,441 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:34,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 18:03:34,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:03:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 18:03:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:34,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:37,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715152352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:37,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:37,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-20 18:03:37,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:37,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858527575] [2022-03-20 18:03:37,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858527575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:37,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:37,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 18:03:37,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148776313] [2022-03-20 18:03:37,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:37,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 18:03:37,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 18:03:37,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:03:37,479 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:38,621 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-20 18:03:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 18:03:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-03-20 18:03:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:38,622 INFO L225 Difference]: With dead ends: 122 [2022-03-20 18:03:38,622 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 18:03:38,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 18:03:38,624 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:38,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:03:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 18:03:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-20 18:03:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-03-20 18:03:38,642 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2022-03-20 18:03:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:38,642 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-03-20 18:03:38,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-03-20 18:03:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 18:03:38,643 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:38,643 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:38,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 18:03:38,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 18:03:38,844 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 101 times [2022-03-20 18:03:38,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:38,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914039101] [2022-03-20 18:03:38,845 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:38,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 102 times [2022-03-20 18:03:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:38,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81466480] [2022-03-20 18:03:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:39,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:03:39,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:39,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81466480] [2022-03-20 18:03:39,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81466480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:39,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547445746] [2022-03-20 18:03:39,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:03:39,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:39,819 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:39,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 18:04:39,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-20 18:04:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 18:04:40,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:40,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:42,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547445746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:42,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:42,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-20 18:04:42,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:42,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914039101] [2022-03-20 18:04:42,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914039101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:42,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:42,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:04:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349947210] [2022-03-20 18:04:42,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:42,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:04:42,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:04:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 18:04:42,881 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:44,053 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-20 18:04:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:04:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-20 18:04:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:44,054 INFO L225 Difference]: With dead ends: 124 [2022-03-20 18:04:44,055 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 18:04:44,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 18:04:44,057 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:44,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 44 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:04:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 18:04:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-03-20 18:04:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-03-20 18:04:44,086 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2022-03-20 18:04:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:44,086 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-03-20 18:04:44,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-03-20 18:04:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 18:04:44,087 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:44,087 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:44,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:44,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:44,311 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 103 times [2022-03-20 18:04:44,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:44,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319371134] [2022-03-20 18:04:44,313 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:44,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 104 times [2022-03-20 18:04:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:44,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272709022] [2022-03-20 18:04:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:44,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:45,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:45,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:45,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272709022] [2022-03-20 18:04:45,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272709022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:45,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011957471] [2022-03-20 18:04:45,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:04:45,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:45,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:45,320 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:45,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 18:04:45,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:04:45,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 18:04:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:45,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:48,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011957471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:48,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:48,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 18:04:48,562 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319371134] [2022-03-20 18:04:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319371134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:48,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:48,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 18:04:48,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323328917] [2022-03-20 18:04:48,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:48,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 18:04:48,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 18:04:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 18:04:48,564 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:49,776 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-20 18:04:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 18:04:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-03-20 18:04:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:49,777 INFO L225 Difference]: With dead ends: 126 [2022-03-20 18:04:49,777 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 18:04:49,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 18:04:49,780 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:49,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:04:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 18:04:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-03-20 18:04:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-03-20 18:04:49,810 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2022-03-20 18:04:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:49,810 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-03-20 18:04:49,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-03-20 18:04:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 18:04:49,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:49,811 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:49,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:50,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-20 18:04:50,034 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 105 times [2022-03-20 18:04:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:50,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358170332] [2022-03-20 18:04:50,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:50,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 106 times [2022-03-20 18:04:50,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:50,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594128426] [2022-03-20 18:04:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:50,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:51,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:51,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594128426] [2022-03-20 18:04:51,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594128426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:51,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205197600] [2022-03-20 18:04:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:04:51,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:51,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:51,186 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:51,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 18:04:51,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:04:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 18:04:51,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:51,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:54,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205197600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:54,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:54,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-20 18:04:54,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:54,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358170332] [2022-03-20 18:04:54,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358170332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:54,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:54,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 18:04:54,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034508849] [2022-03-20 18:04:54,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:54,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 18:04:54,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 18:04:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 18:04:54,517 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:55,815 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-20 18:04:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 18:04:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-03-20 18:04:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:55,816 INFO L225 Difference]: With dead ends: 128 [2022-03-20 18:04:55,816 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 18:04:55,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 18:04:55,819 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:55,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 29 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:04:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 18:04:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-03-20 18:04:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-03-20 18:04:55,859 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2022-03-20 18:04:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:55,859 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-03-20 18:04:55,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-03-20 18:04:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 18:04:55,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:55,860 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:55,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 18:04:56,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 18:04:56,073 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 107 times [2022-03-20 18:04:56,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:56,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938120137] [2022-03-20 18:04:56,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:56,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 108 times [2022-03-20 18:04:56,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558133159] [2022-03-20 18:04:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:56,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:57,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:04:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558133159] [2022-03-20 18:04:57,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558133159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556549170] [2022-03-20 18:04:57,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:04:57,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:57,249 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:57,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 18:05:56,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-20 18:05:56,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:05:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 18:05:56,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:05:56,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:05:59,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556549170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:59,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:59,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-20 18:05:59,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:59,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938120137] [2022-03-20 18:05:59,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938120137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:59,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:59,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 18:05:59,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100775917] [2022-03-20 18:05:59,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:59,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 18:05:59,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 18:05:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 18:05:59,563 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:00,863 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-20 18:06:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 18:06:00,863 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-03-20 18:06:00,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:00,864 INFO L225 Difference]: With dead ends: 130 [2022-03-20 18:06:00,864 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 18:06:00,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 18:06:00,866 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:00,866 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 44 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:06:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 18:06:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-03-20 18:06:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-03-20 18:06:00,896 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2022-03-20 18:06:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:00,896 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-03-20 18:06:00,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-03-20 18:06:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 18:06:00,897 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:00,897 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:06:00,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 18:06:01,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:01,098 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 109 times [2022-03-20 18:06:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:01,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140341485] [2022-03-20 18:06:01,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:01,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 110 times [2022-03-20 18:06:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939097171] [2022-03-20 18:06:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:02,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:06:02,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939097171] [2022-03-20 18:06:02,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939097171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491645438] [2022-03-20 18:06:02,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:06:02,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:02,236 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:02,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 18:06:02,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:06:02,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 18:06:02,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:06:02,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:06:05,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491645438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:05,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:05,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 18:06:05,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:05,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140341485] [2022-03-20 18:06:05,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140341485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:05,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:05,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 18:06:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427471467] [2022-03-20 18:06:05,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:05,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 18:06:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 18:06:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 18:06:05,745 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:07,059 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-20 18:06:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 18:06:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-03-20 18:06:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:07,060 INFO L225 Difference]: With dead ends: 132 [2022-03-20 18:06:07,060 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 18:06:07,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 18:06:07,062 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:07,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 49 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:06:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 18:06:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-03-20 18:06:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-03-20 18:06:07,089 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2022-03-20 18:06:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:07,089 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-03-20 18:06:07,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-03-20 18:06:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 18:06:07,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:07,090 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:06:07,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 18:06:07,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:07,315 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 111 times [2022-03-20 18:06:07,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:07,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1143156302] [2022-03-20 18:06:07,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:07,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 112 times [2022-03-20 18:06:07,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:07,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156982229] [2022-03-20 18:06:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:07,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:08,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:06:08,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156982229] [2022-03-20 18:06:08,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156982229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275220905] [2022-03-20 18:06:08,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:06:08,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:08,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:08,443 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:08,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 18:06:08,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:06:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 18:06:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:06:08,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:06:12,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275220905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:12,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:12,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-20 18:06:12,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:12,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1143156302] [2022-03-20 18:06:12,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1143156302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:12,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:12,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 18:06:12,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218945526] [2022-03-20 18:06:12,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:12,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 18:06:12,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 18:06:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:06:12,079 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:13,425 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-20 18:06:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 18:06:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-03-20 18:06:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:13,426 INFO L225 Difference]: With dead ends: 134 [2022-03-20 18:06:13,426 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 18:06:13,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 18:06:13,428 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:13,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 24 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:06:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 18:06:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-03-20 18:06:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-03-20 18:06:13,452 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2022-03-20 18:06:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:13,452 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-03-20 18:06:13,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-03-20 18:06:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 18:06:13,453 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:13,453 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:06:13,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 18:06:13,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:13,656 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 113 times [2022-03-20 18:06:13,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:13,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236150795] [2022-03-20 18:06:13,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:13,658 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 114 times [2022-03-20 18:06:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:13,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163431558] [2022-03-20 18:06:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:06:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:14,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163431558] [2022-03-20 18:06:14,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163431558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:14,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965424536] [2022-03-20 18:06:14,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:06:14,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:14,783 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:14,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 18:07:11,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-20 18:07:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:11,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 18:07:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:11,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:14,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965424536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:14,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:14,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-20 18:07:14,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236150795] [2022-03-20 18:07:14,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236150795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:14,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:14,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 18:07:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682868766] [2022-03-20 18:07:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:14,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 18:07:14,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 18:07:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 18:07:14,956 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:16,377 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-20 18:07:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 18:07:16,377 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-03-20 18:07:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:16,378 INFO L225 Difference]: With dead ends: 136 [2022-03-20 18:07:16,378 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 18:07:16,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 18:07:16,379 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:16,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:07:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 18:07:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-03-20 18:07:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-03-20 18:07:16,413 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2022-03-20 18:07:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:16,413 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-03-20 18:07:16,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-03-20 18:07:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 18:07:16,414 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:16,414 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:07:16,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 18:07:16,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 18:07:16,615 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:16,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 115 times [2022-03-20 18:07:16,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:16,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248617022] [2022-03-20 18:07:16,616 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:16,616 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 116 times [2022-03-20 18:07:16,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:16,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892994505] [2022-03-20 18:07:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:16,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:17,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:17,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892994505] [2022-03-20 18:07:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892994505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121868363] [2022-03-20 18:07:17,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:07:17,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:17,807 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:17,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 18:07:18,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:07:18,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 18:07:18,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:18,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121868363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:21,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 18:07:21,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248617022] [2022-03-20 18:07:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248617022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:21,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 18:07:21,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835528042] [2022-03-20 18:07:21,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:21,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 18:07:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 18:07:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 18:07:21,674 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:23,123 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-20 18:07:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 18:07:23,124 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-03-20 18:07:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:23,124 INFO L225 Difference]: With dead ends: 138 [2022-03-20 18:07:23,124 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 18:07:23,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 18:07:23,126 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:23,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 39 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:07:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 18:07:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-03-20 18:07:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-03-20 18:07:23,148 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2022-03-20 18:07:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:23,149 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-03-20 18:07:23,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-03-20 18:07:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 18:07:23,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:23,149 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:07:23,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 18:07:23,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 18:07:23,350 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 117 times [2022-03-20 18:07:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165423929] [2022-03-20 18:07:23,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:23,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 118 times [2022-03-20 18:07:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256439200] [2022-03-20 18:07:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:24,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:24,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256439200] [2022-03-20 18:07:24,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256439200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:24,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209012743] [2022-03-20 18:07:24,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:07:24,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:24,579 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:24,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 18:07:24,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:07:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 18:07:24,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:25,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:28,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209012743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:28,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:28,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-20 18:07:28,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:28,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165423929] [2022-03-20 18:07:28,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165423929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:28,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:28,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 18:07:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538867624] [2022-03-20 18:07:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:28,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 18:07:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:28,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 18:07:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:07:28,625 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:30,137 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-20 18:07:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 18:07:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-03-20 18:07:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:30,138 INFO L225 Difference]: With dead ends: 140 [2022-03-20 18:07:30,138 INFO L226 Difference]: Without dead ends: 134 [2022-03-20 18:07:30,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 18:07:30,140 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:30,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 39 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:07:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-20 18:07:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-03-20 18:07:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-03-20 18:07:30,186 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2022-03-20 18:07:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:30,186 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-03-20 18:07:30,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-03-20 18:07:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 18:07:30,187 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:30,187 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:07:30,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 18:07:30,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:30,397 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 119 times [2022-03-20 18:07:30,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:30,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [660014002] [2022-03-20 18:07:30,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:30,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:30,399 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 120 times [2022-03-20 18:07:30,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:30,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945560019] [2022-03-20 18:07:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:30,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:31,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:07:31,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:31,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945560019] [2022-03-20 18:07:31,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945560019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:31,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218783243] [2022-03-20 18:07:31,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:07:31,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:31,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:31,664 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:31,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 18:08:49,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-20 18:08:49,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:08:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 18:08:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:08:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:08:49,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:08:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:08:53,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218783243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:08:53,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:08:53,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 18:08:53,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:08:53,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [660014002] [2022-03-20 18:08:53,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [660014002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:08:53,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:08:53,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 18:08:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135993982] [2022-03-20 18:08:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:08:53,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 18:08:53,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 18:08:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 18:08:53,214 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:08:54,744 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-20 18:08:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 18:08:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-03-20 18:08:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:08:54,745 INFO L225 Difference]: With dead ends: 142 [2022-03-20 18:08:54,745 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 18:08:54,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 18:08:54,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:08:54,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 29 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:08:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 18:08:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-03-20 18:08:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-03-20 18:08:54,782 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2022-03-20 18:08:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:08:54,782 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-03-20 18:08:54,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-03-20 18:08:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 18:08:54,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:08:54,783 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:08:54,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 18:08:54,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:54,983 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:08:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:08:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 121 times [2022-03-20 18:08:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1179950170] [2022-03-20 18:08:54,985 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:08:54,985 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:08:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 122 times [2022-03-20 18:08:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:08:54,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778453872] [2022-03-20 18:08:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:08:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:08:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:56,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:08:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:08:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:08:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778453872] [2022-03-20 18:08:56,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778453872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:08:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645622172] [2022-03-20 18:08:56,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:08:56,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:08:56,274 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:08:56,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 18:08:56,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:08:56,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:08:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 18:08:56,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:08:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:08:56,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:09:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:09:00,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645622172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:09:00,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:09:00,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 18:09:00,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:09:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1179950170] [2022-03-20 18:09:00,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1179950170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:09:00,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:09:00,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 18:09:00,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244558645] [2022-03-20 18:09:00,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:09:00,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 18:09:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 18:09:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 18:09:00,463 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:09:02,015 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-20 18:09:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 18:09:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-03-20 18:09:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:09:02,016 INFO L225 Difference]: With dead ends: 144 [2022-03-20 18:09:02,016 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 18:09:02,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 18:09:02,018 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:09:02,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 34 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:09:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 18:09:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-03-20 18:09:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-03-20 18:09:02,053 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2022-03-20 18:09:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:09:02,053 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-03-20 18:09:02,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-03-20 18:09:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 18:09:02,054 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:09:02,054 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:09:02,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 18:09:02,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:02,256 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:09:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:09:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 123 times [2022-03-20 18:09:02,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:02,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646150875] [2022-03-20 18:09:02,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:09:02,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:09:02,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 124 times [2022-03-20 18:09:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:09:02,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440169584] [2022-03-20 18:09:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:09:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:09:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:09:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:09:03,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:09:03,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440169584] [2022-03-20 18:09:03,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440169584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:09:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472605106] [2022-03-20 18:09:03,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:09:03,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:03,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:09:03,631 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:09:03,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 18:09:04,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:09:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:09:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 18:09:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:09:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:09:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:09:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:09:08,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472605106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:09:08,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:09:08,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-20 18:09:08,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:09:08,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646150875] [2022-03-20 18:09:08,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646150875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:09:08,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:09:08,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 18:09:08,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903649001] [2022-03-20 18:09:08,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:09:08,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 18:09:08,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 18:09:08,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 18:09:08,023 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:09:09,648 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-20 18:09:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 18:09:09,648 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-03-20 18:09:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:09:09,649 INFO L225 Difference]: With dead ends: 146 [2022-03-20 18:09:09,649 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 18:09:09,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 18:09:09,651 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:09:09,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 29 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:09:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 18:09:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-03-20 18:09:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-03-20 18:09:09,680 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2022-03-20 18:09:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:09:09,680 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-03-20 18:09:09,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-03-20 18:09:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 18:09:09,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:09:09,681 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:09:09,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-20 18:09:09,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:09,882 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:09:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:09:09,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 125 times [2022-03-20 18:09:09,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:09,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1893545703] [2022-03-20 18:09:09,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:09:09,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:09:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 126 times [2022-03-20 18:09:09,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:09:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931913559] [2022-03-20 18:09:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:09:09,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:09:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:11,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:09:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:09:11,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:09:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931913559] [2022-03-20 18:09:11,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931913559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:09:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634103757] [2022-03-20 18:09:11,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:09:11,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:11,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:09:11,274 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:09:11,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 18:12:16,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-20 18:12:16,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:12:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 18:12:16,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:12:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:16,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:12:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:20,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634103757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:12:20,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:12:20,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-20 18:12:20,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:12:20,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1893545703] [2022-03-20 18:12:20,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1893545703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:12:20,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:12:20,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 18:12:20,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694020412] [2022-03-20 18:12:20,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:12:20,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 18:12:20,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:20,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 18:12:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 18:12:20,629 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:12:22,331 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-20 18:12:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 18:12:22,332 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-03-20 18:12:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:12:22,332 INFO L225 Difference]: With dead ends: 148 [2022-03-20 18:12:22,332 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 18:12:22,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 18:12:22,335 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:12:22,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 49 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:12:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 18:12:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-03-20 18:12:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-03-20 18:12:22,362 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2022-03-20 18:12:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:12:22,362 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-03-20 18:12:22,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-03-20 18:12:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 18:12:22,363 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:12:22,363 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:12:22,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 18:12:22,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 18:12:22,564 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:12:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:12:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 127 times [2022-03-20 18:12:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519075452] [2022-03-20 18:12:22,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:12:22,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:12:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 128 times [2022-03-20 18:12:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:12:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399085525] [2022-03-20 18:12:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:12:22,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:12:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:23,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:12:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:23,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:12:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399085525] [2022-03-20 18:12:23,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399085525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:12:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111877402] [2022-03-20 18:12:23,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:12:23,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:23,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:12:23,967 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:12:23,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 18:12:24,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:12:24,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:12:24,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 18:12:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:12:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:24,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:12:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:28,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111877402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:12:28,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:12:28,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 18:12:28,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:12:28,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519075452] [2022-03-20 18:12:28,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519075452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:12:28,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:12:28,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 18:12:28,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551898415] [2022-03-20 18:12:28,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:12:28,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 18:12:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:28,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 18:12:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 18:12:28,580 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:12:30,342 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-20 18:12:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 18:12:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-03-20 18:12:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:12:30,343 INFO L225 Difference]: With dead ends: 150 [2022-03-20 18:12:30,343 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 18:12:30,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 18:12:30,345 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:12:30,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 44 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:12:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 18:12:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-03-20 18:12:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-03-20 18:12:30,375 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2022-03-20 18:12:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:12:30,376 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-03-20 18:12:30,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-03-20 18:12:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 18:12:30,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:12:30,376 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:12:30,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 18:12:30,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:30,577 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:12:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:12:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 129 times [2022-03-20 18:12:30,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:30,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1550529009] [2022-03-20 18:12:30,578 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:12:30,578 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:12:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 130 times [2022-03-20 18:12:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:12:30,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484150942] [2022-03-20 18:12:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:12:30,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:12:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:32,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:12:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:32,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:12:32,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484150942] [2022-03-20 18:12:32,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484150942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:12:32,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310850166] [2022-03-20 18:12:32,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:12:32,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:32,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:12:32,039 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:12:32,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 18:12:32,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:12:32,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:12:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 18:12:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:12:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:32,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:12:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310850166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:12:36,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:12:36,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-20 18:12:36,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:12:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1550529009] [2022-03-20 18:12:36,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1550529009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:12:36,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:12:36,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 18:12:36,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079055517] [2022-03-20 18:12:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:12:36,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 18:12:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 18:12:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 18:12:36,767 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:12:38,556 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-20 18:12:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 18:12:38,556 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-03-20 18:12:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:12:38,556 INFO L225 Difference]: With dead ends: 152 [2022-03-20 18:12:38,557 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 18:12:38,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 18:12:38,559 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:12:38,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 44 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:12:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 18:12:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-03-20 18:12:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-03-20 18:12:38,596 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2022-03-20 18:12:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:12:38,597 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-03-20 18:12:38,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-03-20 18:12:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 18:12:38,597 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:12:38,597 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:12:38,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 18:12:38,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 18:12:38,799 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:12:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:12:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 131 times [2022-03-20 18:12:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:38,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859606004] [2022-03-20 18:12:38,800 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:12:38,800 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:12:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 132 times [2022-03-20 18:12:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:12:38,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111106373] [2022-03-20 18:12:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:12:38,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:12:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:40,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:12:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:12:40,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:12:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111106373] [2022-03-20 18:12:40,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111106373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:12:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687306490] [2022-03-20 18:12:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:12:40,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:12:40,258 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:12:40,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process