/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:00:08,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:00:08,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:00:08,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 00:00:08,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 00:00:08,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 00:00:08,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 00:00:08,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 00:00:08,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 00:00:08,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 00:00:08,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 00:00:08,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 00:00:08,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 00:00:08,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 00:00:08,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 00:00:08,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 00:00:08,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 00:00:08,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 00:00:08,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 00:00:08,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 00:00:08,290 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 00:00:08,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 00:00:08,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 00:00:08,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 00:00:08,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 00:00:08,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 00:00:08,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 00:00:08,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 00:00:08,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 00:00:08,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 00:00:08,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 00:00:08,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 00:00:08,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 00:00:08,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 00:00:08,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 00:00:08,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 00:00:08,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 00:00:08,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 00:00:08,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 00:00:08,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:00:08,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:00:08,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:00:08,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:00:08,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:00:08,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:00:08,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:00:08,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:00:08,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:00:08,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:00:08,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:00:08,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:00:08,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:00:08,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:00:08,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:00:08,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:00:08,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:00:08,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:00:08,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:00:08,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:00:08,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:00:08,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:00:08,324 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:00:08,324 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:00:08,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:00:08,324 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:00:08,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:00:08,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:00:08,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:00:08,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:00:08,585 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:00:08,586 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:00:08,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2022-03-18 00:00:08,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aee18f65/5bd1243496c143e99fbeda0e9c226738/FLAG290551f67 [2022-03-18 00:00:09,031 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:00:09,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2022-03-18 00:00:09,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aee18f65/5bd1243496c143e99fbeda0e9c226738/FLAG290551f67 [2022-03-18 00:00:09,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aee18f65/5bd1243496c143e99fbeda0e9c226738 [2022-03-18 00:00:09,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:00:09,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:00:09,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:00:09,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:00:09,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:00:09,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cc421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09, skipping insertion in model container [2022-03-18 00:00:09,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:00:09,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:00:09,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c[323,336] [2022-03-18 00:00:09,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:00:09,689 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:00:09,699 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c[323,336] [2022-03-18 00:00:09,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:00:09,737 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:00:09,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09 WrapperNode [2022-03-18 00:00:09,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:00:09,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:00:09,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:00:09,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:00:09,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:00:09,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:00:09,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:00:09,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:00:09,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:00:09,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:09,817 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) [2022-03-18 00:00:09,830 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 [2022-03-18 00:00:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:00:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:00:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:00:09,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:00:09,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:00:09,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:00:09,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:00:09,856 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:00:09,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:00:09,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:00:09,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:00:09,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 00:00:09,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:00:09,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:00:09,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:00:09,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:00:09,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:00:09,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:00:09,928 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:00:09,929 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:00:10,166 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:00:10,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:00:10,171 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 00:00:10,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:00:10 BoogieIcfgContainer [2022-03-18 00:00:10,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:00:10,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:00:10,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:00:10,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:00:10,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:00:09" (1/3) ... [2022-03-18 00:00:10,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a3ac04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:00:10, skipping insertion in model container [2022-03-18 00:00:10,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09" (2/3) ... [2022-03-18 00:00:10,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a3ac04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:00:10, skipping insertion in model container [2022-03-18 00:00:10,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:00:10" (3/3) ... [2022-03-18 00:00:10,178 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2022-03-18 00:00:10,182 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:00:10,182 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:00:10,239 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:00:10,245 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 [2022-03-18 00:00:10,245 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:00:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 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) [2022-03-18 00:00:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:00:10,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:10,263 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:10,264 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 1 times [2022-03-18 00:00:10,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:10,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681450961] [2022-03-18 00:00:10,286 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:00:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 2 times [2022-03-18 00:00:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:10,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219614960] [2022-03-18 00:00:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:10,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:00:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:10,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219614960] [2022-03-18 00:00:10,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219614960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:10,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:10,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:00:10,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:10,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681450961] [2022-03-18 00:00:10,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681450961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:10,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:10,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:00:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805805043] [2022-03-18 00:00:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:10,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:00:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:10,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:00:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:00:10,593 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-03-18 00:00:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:10,651 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2022-03-18 00:00:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:00:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2022-03-18 00:00:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:10,660 INFO L225 Difference]: With dead ends: 61 [2022-03-18 00:00:10,660 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 00:00:10,665 INFO L911 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 [2022-03-18 00:00:10,672 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:10,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:00:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 00:00:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 00:00:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-03-18 00:00:10,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2022-03-18 00:00:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:10,717 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-03-18 00:00:10,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-03-18 00:00:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-03-18 00:00:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:00:10,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:10,719 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:10,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:00:10,719 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 1 times [2022-03-18 00:00:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:10,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2122375093] [2022-03-18 00:00:10,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:00:10,724 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 2 times [2022-03-18 00:00:10,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:10,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615127511] [2022-03-18 00:00:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:10,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:10,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:00:10,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615127511] [2022-03-18 00:00:10,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615127511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:10,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:10,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:00:10,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:10,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2122375093] [2022-03-18 00:00:10,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2122375093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:10,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:10,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:00:10,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718750343] [2022-03-18 00:00:10,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:10,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:00:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:00:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:00:10,854 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-03-18 00:00:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:10,927 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 00:00:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:00:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2022-03-18 00:00:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:10,928 INFO L225 Difference]: With dead ends: 54 [2022-03-18 00:00:10,928 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 00:00:10,928 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:00:10,929 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:10,930 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 00:00:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-03-18 00:00:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-03-18 00:00:10,936 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-03-18 00:00:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:10,936 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-03-18 00:00:10,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-03-18 00:00:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-03-18 00:00:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 00:00:10,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:10,937 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:10,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:00:10,937 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:10,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 1 times [2022-03-18 00:00:10,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:10,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [936091932] [2022-03-18 00:00:10,942 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:10,943 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 2 times [2022-03-18 00:00:10,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:10,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770331798] [2022-03-18 00:00:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:10,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:00:11,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770331798] [2022-03-18 00:00:11,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770331798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:11,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:11,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [936091932] [2022-03-18 00:00:11,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [936091932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:11,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803572028] [2022-03-18 00:00:11,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:11,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:00:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:00:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:00:11,062 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2022-03-18 00:00:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:11,215 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-03-18 00:00:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:00:11,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 [2022-03-18 00:00:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:11,219 INFO L225 Difference]: With dead ends: 61 [2022-03-18 00:00:11,219 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 00:00:11,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:00:11,222 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:11,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 00:00:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-03-18 00:00:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-18 00:00:11,248 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2022-03-18 00:00:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:11,248 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-18 00:00:11,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2022-03-18 00:00:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-18 00:00:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:00:11,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:11,250 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:11,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:00:11,251 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 1 times [2022-03-18 00:00:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [114911498] [2022-03-18 00:00:11,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:11,255 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:11,255 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 2 times [2022-03-18 00:00:11,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:11,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489142881] [2022-03-18 00:00:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:11,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:00:11,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489142881] [2022-03-18 00:00:11,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489142881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:11,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [114911498] [2022-03-18 00:00:11,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [114911498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:11,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455631341] [2022-03-18 00:00:11,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:11,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:00:11,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:00:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:00:11,359 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-03-18 00:00:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:11,437 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-03-18 00:00:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:00:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 23 [2022-03-18 00:00:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:11,439 INFO L225 Difference]: With dead ends: 55 [2022-03-18 00:00:11,439 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:00:11,439 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:00:11,442 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:11,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:00:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:00:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-18 00:00:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-03-18 00:00:11,459 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-03-18 00:00:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:11,459 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-03-18 00:00:11,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-03-18 00:00:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-03-18 00:00:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 00:00:11,461 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:11,461 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:11,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 00:00:11,461 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 1 times [2022-03-18 00:00:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2081461829] [2022-03-18 00:00:11,468 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:11,470 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 2 times [2022-03-18 00:00:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:11,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375673579] [2022-03-18 00:00:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:11,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:11,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375673579] [2022-03-18 00:00:11,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375673579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:11,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2081461829] [2022-03-18 00:00:11,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2081461829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:11,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127162426] [2022-03-18 00:00:11,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:11,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:00:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:00:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:00:11,568 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-18 00:00:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:11,664 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-03-18 00:00:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:00:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 [2022-03-18 00:00:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:11,665 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:00:11,665 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:00:11,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:00:11,666 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:11,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:00:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2022-03-18 00:00:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-18 00:00:11,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2022-03-18 00:00:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:11,678 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-18 00:00:11,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-18 00:00:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-18 00:00:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:00:11,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:11,679 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:11,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 00:00:11,680 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 1 times [2022-03-18 00:00:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [471371967] [2022-03-18 00:00:11,683 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:11,683 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 2 times [2022-03-18 00:00:11,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:11,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499009296] [2022-03-18 00:00:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:11,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:11,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:11,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499009296] [2022-03-18 00:00:11,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499009296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:11,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084470689] [2022-03-18 00:00:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:11,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:11,787 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) [2022-03-18 00:00:11,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:00:11,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:11,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:11,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:12,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:12,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084470689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:12,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:12,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-18 00:00:12,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [471371967] [2022-03-18 00:00:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [471371967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:12,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:12,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:12,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928729927] [2022-03-18 00:00:12,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:12,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:00:12,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:12,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:00:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:00:12,093 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-03-18 00:00:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:12,174 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-03-18 00:00:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:00:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 29 [2022-03-18 00:00:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:12,175 INFO L225 Difference]: With dead ends: 63 [2022-03-18 00:00:12,175 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 00:00:12,175 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:00:12,176 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:12,176 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 00:00:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-03-18 00:00:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-03-18 00:00:12,181 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2022-03-18 00:00:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:12,182 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-03-18 00:00:12,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-03-18 00:00:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-03-18 00:00:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 00:00:12,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:12,183 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:12,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:12,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-18 00:00:12,400 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1490218863, now seen corresponding path program 3 times [2022-03-18 00:00:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1878791479] [2022-03-18 00:00:12,401 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:12,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1490218863, now seen corresponding path program 4 times [2022-03-18 00:00:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560746407] [2022-03-18 00:00:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:12,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560746407] [2022-03-18 00:00:12,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560746407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86784929] [2022-03-18 00:00:12,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:12,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:12,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:12,480 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) [2022-03-18 00:00:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:00:12,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 00:00:12,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:12,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 00:00:12,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86784929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:12,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 00:00:12,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-18 00:00:12,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1878791479] [2022-03-18 00:00:12,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1878791479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:12,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:12,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:00:12,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388299643] [2022-03-18 00:00:12,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:12,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:00:12,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:00:12,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:00:12,639 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:12,674 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-03-18 00:00:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:00:12,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 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 [2022-03-18 00:00:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:12,675 INFO L225 Difference]: With dead ends: 65 [2022-03-18 00:00:12,676 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 00:00:12,676 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:00:12,677 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:12,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:00:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 00:00:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-18 00:00:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-03-18 00:00:12,684 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2022-03-18 00:00:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:12,685 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-03-18 00:00:12,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-03-18 00:00:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 00:00:12,686 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:12,686 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:12,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:12,892 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,SelfDestructingSolverStorable6 [2022-03-18 00:00:12,892 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1271364145, now seen corresponding path program 1 times [2022-03-18 00:00:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:12,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [898191962] [2022-03-18 00:00:12,895 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:12,895 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1271364145, now seen corresponding path program 2 times [2022-03-18 00:00:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:12,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340472848] [2022-03-18 00:00:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:12,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:12,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:12,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340472848] [2022-03-18 00:00:12,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340472848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:12,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902196694] [2022-03-18 00:00:12,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:12,992 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) [2022-03-18 00:00:12,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:00:13,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:13,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:13,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:00:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:13,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:13,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902196694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:13,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:13,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-18 00:00:13,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [898191962] [2022-03-18 00:00:13,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [898191962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:13,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:13,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:00:13,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457905249] [2022-03-18 00:00:13,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:13,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:00:13,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:13,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:00:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:00:13,252 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-18 00:00:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:13,365 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-03-18 00:00:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:00:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 [2022-03-18 00:00:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:13,378 INFO L225 Difference]: With dead ends: 66 [2022-03-18 00:00:13,378 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 00:00:13,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:00:13,379 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:13,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 00:00:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-18 00:00:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-18 00:00:13,397 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 32 [2022-03-18 00:00:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:13,397 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-18 00:00:13,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-18 00:00:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-18 00:00:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:00:13,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:13,402 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:13,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:13,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:13,633 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320561, now seen corresponding path program 3 times [2022-03-18 00:00:13,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:13,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [790317192] [2022-03-18 00:00:13,635 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:13,635 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320561, now seen corresponding path program 4 times [2022-03-18 00:00:13,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:13,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097274361] [2022-03-18 00:00:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:13,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:13,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097274361] [2022-03-18 00:00:13,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097274361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143661851] [2022-03-18 00:00:13,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:13,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:13,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:13,704 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) [2022-03-18 00:00:13,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:00:13,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:13,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:13,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:13,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 00:00:13,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 00:00:14,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143661851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:14,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:14,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-18 00:00:14,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [790317192] [2022-03-18 00:00:14,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [790317192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:14,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:14,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:00:14,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321982318] [2022-03-18 00:00:14,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:14,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:00:14,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:00:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:00:14,035 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2022-03-18 00:00:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:14,148 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-18 00:00:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:00:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 35 [2022-03-18 00:00:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:14,149 INFO L225 Difference]: With dead ends: 69 [2022-03-18 00:00:14,149 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 00:00:14,149 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:00:14,150 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:14,150 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 48 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 00:00:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-03-18 00:00:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-03-18 00:00:14,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 35 [2022-03-18 00:00:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:14,157 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-03-18 00:00:14,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2022-03-18 00:00:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-03-18 00:00:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 00:00:14,157 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:14,157 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:14,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:14,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:14,382 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash 385921679, now seen corresponding path program 5 times [2022-03-18 00:00:14,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:14,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [337637175] [2022-03-18 00:00:14,384 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:14,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:14,384 INFO L85 PathProgramCache]: Analyzing trace with hash 385921679, now seen corresponding path program 6 times [2022-03-18 00:00:14,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:14,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682447805] [2022-03-18 00:00:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:14,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:14,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:00:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682447805] [2022-03-18 00:00:14,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682447805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396019573] [2022-03-18 00:00:14,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:14,484 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) [2022-03-18 00:00:14,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:00:14,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:14,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:00:14,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:00:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396019573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:14,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:14,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-18 00:00:14,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [337637175] [2022-03-18 00:00:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [337637175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:14,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:14,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:00:14,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133208136] [2022-03-18 00:00:14,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:14,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:00:14,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:00:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:00:14,785 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2022-03-18 00:00:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:14,913 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-03-18 00:00:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:00:14,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 [2022-03-18 00:00:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:14,914 INFO L225 Difference]: With dead ends: 72 [2022-03-18 00:00:14,914 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 00:00:14,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:00:14,915 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:14,915 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 00:00:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-03-18 00:00:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-03-18 00:00:14,923 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 38 [2022-03-18 00:00:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:14,923 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-03-18 00:00:14,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2022-03-18 00:00:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-03-18 00:00:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:00:14,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:14,923 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:14,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:15,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 00:00:15,140 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1361731471, now seen corresponding path program 7 times [2022-03-18 00:00:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:15,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2049246261] [2022-03-18 00:00:15,142 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:15,142 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1361731471, now seen corresponding path program 8 times [2022-03-18 00:00:15,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:15,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601322199] [2022-03-18 00:00:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:15,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:15,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:15,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:15,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601322199] [2022-03-18 00:00:15,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601322199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:15,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260276696] [2022-03-18 00:00:15,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:15,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:15,192 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) [2022-03-18 00:00:15,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:00:15,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:15,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-18 00:00:15,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-18 00:00:15,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260276696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:15,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:15,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-18 00:00:15,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2049246261] [2022-03-18 00:00:15,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2049246261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:15,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:15,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:00:15,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57929749] [2022-03-18 00:00:15,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:15,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:00:15,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:00:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:00:15,428 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-18 00:00:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:15,508 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-03-18 00:00:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:00:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 41 [2022-03-18 00:00:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:15,510 INFO L225 Difference]: With dead ends: 73 [2022-03-18 00:00:15,510 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 00:00:15,511 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:00:15,511 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:15,511 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 45 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 00:00:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-03-18 00:00:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-03-18 00:00:15,520 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 41 [2022-03-18 00:00:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:15,520 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-03-18 00:00:15,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-18 00:00:15,520 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-03-18 00:00:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 00:00:15,521 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:15,521 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:15,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:15,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:15,740 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1307195270, now seen corresponding path program 9 times [2022-03-18 00:00:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272883031] [2022-03-18 00:00:15,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:15,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1307195270, now seen corresponding path program 10 times [2022-03-18 00:00:15,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:15,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102496506] [2022-03-18 00:00:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:15,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:15,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102496506] [2022-03-18 00:00:15,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102496506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472702957] [2022-03-18 00:00:15,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:15,804 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) [2022-03-18 00:00:15,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:00:15,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:15,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:15,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:00:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:15,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:16,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472702957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:16,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:16,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-18 00:00:16,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:16,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272883031] [2022-03-18 00:00:16,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272883031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:16,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:16,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:00:16,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836785108] [2022-03-18 00:00:16,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:16,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:00:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:00:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:00:16,092 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-03-18 00:00:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:16,181 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-18 00:00:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:00:16,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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 [2022-03-18 00:00:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:16,182 INFO L225 Difference]: With dead ends: 79 [2022-03-18 00:00:16,182 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 00:00:16,183 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:00:16,183 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:16,183 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 45 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:00:16,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 00:00:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-18 00:00:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-18 00:00:16,189 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 44 [2022-03-18 00:00:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:16,189 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-18 00:00:16,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-03-18 00:00:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-18 00:00:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:00:16,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:16,190 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:16,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:16,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:16,404 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash -116869167, now seen corresponding path program 11 times [2022-03-18 00:00:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [904269542] [2022-03-18 00:00:16,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:16,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash -116869167, now seen corresponding path program 12 times [2022-03-18 00:00:16,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:16,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238346717] [2022-03-18 00:00:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:16,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:16,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:16,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238346717] [2022-03-18 00:00:16,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238346717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:16,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476614224] [2022-03-18 00:00:16,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:16,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:16,465 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) [2022-03-18 00:00:16,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:00:16,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 00:00:16,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 00:00:16,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476614224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:16,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:16,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-18 00:00:16,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:16,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [904269542] [2022-03-18 00:00:16,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [904269542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:16,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:16,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:00:16,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585158351] [2022-03-18 00:00:16,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:16,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:00:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:00:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:00:16,771 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2022-03-18 00:00:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:16,879 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-18 00:00:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:00:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 47 [2022-03-18 00:00:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:16,880 INFO L225 Difference]: With dead ends: 85 [2022-03-18 00:00:16,880 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:00:16,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:00:16,881 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:16,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:00:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-03-18 00:00:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-03-18 00:00:16,888 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 47 [2022-03-18 00:00:16,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:16,888 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-03-18 00:00:16,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2022-03-18 00:00:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-03-18 00:00:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 00:00:16,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:16,889 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:16,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:17,108 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,SelfDestructingSolverStorable12 [2022-03-18 00:00:17,108 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1638069530, now seen corresponding path program 13 times [2022-03-18 00:00:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:17,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487271136] [2022-03-18 00:00:17,111 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:17,111 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1638069530, now seen corresponding path program 14 times [2022-03-18 00:00:17,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:17,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130028603] [2022-03-18 00:00:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:17,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:17,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:17,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130028603] [2022-03-18 00:00:17,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130028603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:17,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712291442] [2022-03-18 00:00:17,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:17,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:17,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:17,199 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) [2022-03-18 00:00:17,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:00:17,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:00:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:17,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:17,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712291442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:17,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:17,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-18 00:00:17,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:17,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487271136] [2022-03-18 00:00:17,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487271136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:17,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:17,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:00:17,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329356371] [2022-03-18 00:00:17,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:17,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:00:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:00:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:00:17,539 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-03-18 00:00:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:17,671 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-18 00:00:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:00:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 [2022-03-18 00:00:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:17,673 INFO L225 Difference]: With dead ends: 91 [2022-03-18 00:00:17,673 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 00:00:17,674 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:00:17,675 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:17,675 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 50 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 00:00:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-03-18 00:00:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-03-18 00:00:17,685 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 50 [2022-03-18 00:00:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:17,685 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-03-18 00:00:17,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-03-18 00:00:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-03-18 00:00:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:00:17,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:17,687 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:17,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:17,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 00:00:17,907 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash 379897649, now seen corresponding path program 15 times [2022-03-18 00:00:17,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [329183056] [2022-03-18 00:00:17,910 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:17,910 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash 379897649, now seen corresponding path program 16 times [2022-03-18 00:00:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930500141] [2022-03-18 00:00:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:17,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930500141] [2022-03-18 00:00:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930500141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382982990] [2022-03-18 00:00:17,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:17,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:17,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:17,985 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) [2022-03-18 00:00:17,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:00:18,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:00:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:18,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:18,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382982990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:18,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:18,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-18 00:00:18,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [329183056] [2022-03-18 00:00:18,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [329183056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:18,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:18,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:00:18,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811977717] [2022-03-18 00:00:18,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:18,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:00:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:00:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:00:18,367 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2022-03-18 00:00:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:18,573 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-18 00:00:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:00:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 53 [2022-03-18 00:00:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:18,574 INFO L225 Difference]: With dead ends: 97 [2022-03-18 00:00:18,574 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 00:00:18,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:00:18,576 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:18,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 60 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 00:00:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-03-18 00:00:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-03-18 00:00:18,587 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 53 [2022-03-18 00:00:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:18,588 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-03-18 00:00:18,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2022-03-18 00:00:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-03-18 00:00:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 00:00:18,588 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:18,589 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:18,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:18,815 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,SelfDestructingSolverStorable14 [2022-03-18 00:00:18,815 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash 360982970, now seen corresponding path program 17 times [2022-03-18 00:00:18,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:18,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1743840458] [2022-03-18 00:00:18,817 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:18,817 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 360982970, now seen corresponding path program 18 times [2022-03-18 00:00:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:18,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344924662] [2022-03-18 00:00:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:18,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344924662] [2022-03-18 00:00:18,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344924662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374008191] [2022-03-18 00:00:18,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:18,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:18,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:18,900 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) [2022-03-18 00:00:18,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:00:19,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:19,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:19,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:19,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-18 00:00:19,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-18 00:00:19,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374008191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:19,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:19,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2022-03-18 00:00:19,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:19,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1743840458] [2022-03-18 00:00:19,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1743840458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:19,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:19,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:00:19,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816478680] [2022-03-18 00:00:19,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:19,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:00:19,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:00:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:00:19,242 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2022-03-18 00:00:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:19,416 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-03-18 00:00:19,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:00:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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 [2022-03-18 00:00:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:19,417 INFO L225 Difference]: With dead ends: 103 [2022-03-18 00:00:19,417 INFO L226 Difference]: Without dead ends: 66 [2022-03-18 00:00:19,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:00:19,418 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:19,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-18 00:00:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-18 00:00:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-03-18 00:00:19,424 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 56 [2022-03-18 00:00:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:19,425 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-03-18 00:00:19,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2022-03-18 00:00:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-03-18 00:00:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 00:00:19,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:19,425 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:19,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:19,632 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,SelfDestructingSolverStorable15 [2022-03-18 00:00:19,633 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:19,633 INFO L85 PathProgramCache]: Analyzing trace with hash -485503343, now seen corresponding path program 19 times [2022-03-18 00:00:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:19,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965771159] [2022-03-18 00:00:19,634 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:19,635 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash -485503343, now seen corresponding path program 20 times [2022-03-18 00:00:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:19,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383095939] [2022-03-18 00:00:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:19,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:19,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:19,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:19,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383095939] [2022-03-18 00:00:19,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383095939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:19,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812088661] [2022-03-18 00:00:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:19,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:19,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:19,758 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) [2022-03-18 00:00:19,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:00:19,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:19,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 00:00:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:20,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:20,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812088661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:20,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:20,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-18 00:00:20,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:20,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965771159] [2022-03-18 00:00:20,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965771159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:20,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:20,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:00:20,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231086642] [2022-03-18 00:00:20,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:20,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:00:20,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:20,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:00:20,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=483, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:00:20,277 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2022-03-18 00:00:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:20,497 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-03-18 00:00:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:00:20,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 59 [2022-03-18 00:00:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:20,497 INFO L225 Difference]: With dead ends: 109 [2022-03-18 00:00:20,498 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 00:00:20,498 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=518, Invalid=888, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:00:20,499 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 125 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:20,499 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 45 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 00:00:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-03-18 00:00:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-03-18 00:00:20,506 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2022-03-18 00:00:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:20,506 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-03-18 00:00:20,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2022-03-18 00:00:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-03-18 00:00:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 00:00:20,506 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:20,506 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:20,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:20,711 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,SelfDestructingSolverStorable16 [2022-03-18 00:00:20,712 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:20,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1888708186, now seen corresponding path program 21 times [2022-03-18 00:00:20,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:20,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [923732148] [2022-03-18 00:00:20,714 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:20,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1888708186, now seen corresponding path program 22 times [2022-03-18 00:00:20,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:20,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658531395] [2022-03-18 00:00:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:20,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:20,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658531395] [2022-03-18 00:00:20,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658531395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761028280] [2022-03-18 00:00:20,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:20,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:20,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:20,867 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) [2022-03-18 00:00:20,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:00:20,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:20,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 00:00:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 71 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:21,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 71 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:21,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761028280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:21,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:21,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-18 00:00:21,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [923732148] [2022-03-18 00:00:21,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [923732148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:21,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:21,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:00:21,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520098271] [2022-03-18 00:00:21,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:21,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:00:21,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:00:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:00:21,333 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2022-03-18 00:00:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:21,612 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-18 00:00:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:00:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 [2022-03-18 00:00:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:21,613 INFO L225 Difference]: With dead ends: 115 [2022-03-18 00:00:21,613 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 00:00:21,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:00:21,614 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 137 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:21,615 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 50 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 00:00:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-03-18 00:00:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.234375) internal successors, (79), 64 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-03-18 00:00:21,623 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 62 [2022-03-18 00:00:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:21,623 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-03-18 00:00:21,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2022-03-18 00:00:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-03-18 00:00:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 00:00:21,624 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:21,624 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:21,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:21,842 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,SelfDestructingSolverStorable17 [2022-03-18 00:00:21,842 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1792029199, now seen corresponding path program 23 times [2022-03-18 00:00:21,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:21,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1275920065] [2022-03-18 00:00:21,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:21,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1792029199, now seen corresponding path program 24 times [2022-03-18 00:00:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:21,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843518789] [2022-03-18 00:00:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:22,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843518789] [2022-03-18 00:00:22,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843518789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988956185] [2022-03-18 00:00:22,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:22,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:22,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:22,036 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) [2022-03-18 00:00:22,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:00:22,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:22,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-18 00:00:22,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-18 00:00:22,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988956185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:22,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:22,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-03-18 00:00:22,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1275920065] [2022-03-18 00:00:22,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1275920065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:22,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:22,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:00:22,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963186716] [2022-03-18 00:00:22,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:22,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:00:22,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:22,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:00:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:00:22,507 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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) [2022-03-18 00:00:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:22,780 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2022-03-18 00:00:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:00:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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 65 [2022-03-18 00:00:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:22,782 INFO L225 Difference]: With dead ends: 121 [2022-03-18 00:00:22,782 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 00:00:22,782 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:00:22,783 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:22,783 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 55 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 00:00:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-03-18 00:00:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 67 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-18 00:00:22,794 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2022-03-18 00:00:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:22,794 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-18 00:00:22,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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) [2022-03-18 00:00:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-18 00:00:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 00:00:22,797 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:22,797 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:22,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:23,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:23,007 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 170568442, now seen corresponding path program 25 times [2022-03-18 00:00:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1937286790] [2022-03-18 00:00:23,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:23,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash 170568442, now seen corresponding path program 26 times [2022-03-18 00:00:23,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:23,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804689959] [2022-03-18 00:00:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:23,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:23,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804689959] [2022-03-18 00:00:23,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804689959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:23,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751745944] [2022-03-18 00:00:23,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:23,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:23,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:23,184 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) [2022-03-18 00:00:23,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:00:23,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:23,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 00:00:23,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:23,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:23,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751745944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:23,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:23,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-03-18 00:00:23,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1937286790] [2022-03-18 00:00:23,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1937286790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:23,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:00:23,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19062287] [2022-03-18 00:00:23,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:23,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:00:23,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:23,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:00:23,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=746, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:00:23,909 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 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) [2022-03-18 00:00:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:24,256 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2022-03-18 00:00:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:00:24,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 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 [2022-03-18 00:00:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:24,259 INFO L225 Difference]: With dead ends: 127 [2022-03-18 00:00:24,259 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 00:00:24,260 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=816, Invalid=1440, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:00:24,260 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:24,260 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 45 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 00:00:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-18 00:00:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-03-18 00:00:24,274 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 68 [2022-03-18 00:00:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:24,274 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-03-18 00:00:24,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 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) [2022-03-18 00:00:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-03-18 00:00:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 00:00:24,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:24,275 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:24,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:24,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:24,492 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 527091025, now seen corresponding path program 27 times [2022-03-18 00:00:24,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:24,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [666198913] [2022-03-18 00:00:24,494 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:24,495 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash 527091025, now seen corresponding path program 28 times [2022-03-18 00:00:24,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:24,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253233471] [2022-03-18 00:00:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:24,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:24,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:24,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:24,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253233471] [2022-03-18 00:00:24,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253233471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:24,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356556088] [2022-03-18 00:00:24,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:24,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:24,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:24,664 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) [2022-03-18 00:00:24,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:00:24,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:24,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:00:24,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 146 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:25,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 146 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:25,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356556088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:25,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:25,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-18 00:00:25,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:25,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [666198913] [2022-03-18 00:00:25,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [666198913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:25,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:25,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:00:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470189353] [2022-03-18 00:00:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:25,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:00:25,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:25,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:00:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1359, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:00:25,348 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2022-03-18 00:00:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:25,655 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2022-03-18 00:00:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:00:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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 71 [2022-03-18 00:00:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:25,656 INFO L225 Difference]: With dead ends: 133 [2022-03-18 00:00:25,656 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 00:00:25,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=607, Invalid=2363, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:00:25,657 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:25,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 50 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 00:00:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-18 00:00:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-03-18 00:00:25,667 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 71 [2022-03-18 00:00:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:25,667 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-03-18 00:00:25,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2022-03-18 00:00:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-03-18 00:00:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 00:00:25,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:25,667 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:25,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:25,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:25,883 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 237238170, now seen corresponding path program 29 times [2022-03-18 00:00:25,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:25,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978225861] [2022-03-18 00:00:25,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:25,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash 237238170, now seen corresponding path program 30 times [2022-03-18 00:00:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:25,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729712913] [2022-03-18 00:00:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:26,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:26,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729712913] [2022-03-18 00:00:26,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729712913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:26,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842800042] [2022-03-18 00:00:26,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:26,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:26,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:26,156 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) [2022-03-18 00:00:26,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:00:26,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:26,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:26,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-18 00:00:26,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-18 00:00:26,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842800042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:26,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:26,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-03-18 00:00:26,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:26,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978225861] [2022-03-18 00:00:26,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978225861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:26,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:26,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:00:26,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218830959] [2022-03-18 00:00:26,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:26,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:00:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:00:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:00:26,624 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2022-03-18 00:00:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:26,933 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2022-03-18 00:00:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:00:26,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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 [2022-03-18 00:00:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:26,935 INFO L225 Difference]: With dead ends: 139 [2022-03-18 00:00:26,935 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 00:00:26,936 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:00:26,936 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:26,937 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 55 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 00:00:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-03-18 00:00:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2022-03-18 00:00:26,950 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 74 [2022-03-18 00:00:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:26,950 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2022-03-18 00:00:26,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2022-03-18 00:00:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2022-03-18 00:00:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 00:00:26,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:26,951 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:26,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-18 00:00:27,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:27,160 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1884900175, now seen corresponding path program 31 times [2022-03-18 00:00:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449336166] [2022-03-18 00:00:27,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:27,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:27,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1884900175, now seen corresponding path program 32 times [2022-03-18 00:00:27,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:27,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977930473] [2022-03-18 00:00:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:27,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977930473] [2022-03-18 00:00:27,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977930473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461843840] [2022-03-18 00:00:27,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:27,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:27,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:27,356 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) [2022-03-18 00:00:27,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:00:27,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 00:00:27,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:27,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461843840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:28,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:28,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-03-18 00:00:28,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:28,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449336166] [2022-03-18 00:00:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449336166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:28,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:28,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:00:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331230984] [2022-03-18 00:00:28,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:28,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:00:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:00:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=893, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:00:28,109 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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) [2022-03-18 00:00:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:28,425 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2022-03-18 00:00:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:00:28,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 77 [2022-03-18 00:00:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:28,425 INFO L225 Difference]: With dead ends: 145 [2022-03-18 00:00:28,425 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 00:00:28,426 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=972, Invalid=1890, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:00:28,427 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 193 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:28,427 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 00:00:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-03-18 00:00:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-03-18 00:00:28,438 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 77 [2022-03-18 00:00:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:28,438 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-03-18 00:00:28,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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) [2022-03-18 00:00:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-03-18 00:00:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 00:00:28,439 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:28,439 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:28,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-18 00:00:28,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:28,643 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash -589738950, now seen corresponding path program 33 times [2022-03-18 00:00:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:28,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408316478] [2022-03-18 00:00:28,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:28,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash -589738950, now seen corresponding path program 34 times [2022-03-18 00:00:28,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:28,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232949822] [2022-03-18 00:00:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:28,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:28,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:28,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232949822] [2022-03-18 00:00:28,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232949822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:28,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880701314] [2022-03-18 00:00:28,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:28,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:28,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:28,916 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) [2022-03-18 00:00:28,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:00:29,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:29,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:00:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 248 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:29,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 248 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:29,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880701314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:29,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:29,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2022-03-18 00:00:29,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:29,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408316478] [2022-03-18 00:00:29,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408316478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:29,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:29,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:00:29,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684154161] [2022-03-18 00:00:29,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:29,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:00:29,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:00:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1950, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:00:29,547 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 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) [2022-03-18 00:00:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:29,960 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2022-03-18 00:00:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:00:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 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 [2022-03-18 00:00:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:29,964 INFO L225 Difference]: With dead ends: 151 [2022-03-18 00:00:29,964 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 00:00:29,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=3473, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:00:29,965 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:29,966 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 00:00:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-18 00:00:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-03-18 00:00:29,978 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 80 [2022-03-18 00:00:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:29,978 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-03-18 00:00:29,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 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) [2022-03-18 00:00:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-03-18 00:00:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:00:29,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:29,980 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:30,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:30,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:30,199 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:30,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:30,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1867095057, now seen corresponding path program 35 times [2022-03-18 00:00:30,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:30,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406506674] [2022-03-18 00:00:30,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:30,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1867095057, now seen corresponding path program 36 times [2022-03-18 00:00:30,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:30,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623105870] [2022-03-18 00:00:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:30,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:30,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623105870] [2022-03-18 00:00:30,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623105870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:30,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225579786] [2022-03-18 00:00:30,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:30,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:30,400 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) [2022-03-18 00:00:30,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:00:30,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:30,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-18 00:00:30,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-18 00:00:30,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225579786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:30,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:30,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5, 5] total 26 [2022-03-18 00:00:30,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:30,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406506674] [2022-03-18 00:00:30,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406506674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:30,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:30,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:00:30,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666899341] [2022-03-18 00:00:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:30,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:00:30,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:00:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:00:30,926 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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) [2022-03-18 00:00:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:31,263 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-03-18 00:00:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:00:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 83 [2022-03-18 00:00:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:31,264 INFO L225 Difference]: With dead ends: 157 [2022-03-18 00:00:31,264 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 00:00:31,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=521, Invalid=1285, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:00:31,265 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:31,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 00:00:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-03-18 00:00:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 85 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-18 00:00:31,278 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 83 [2022-03-18 00:00:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:31,278 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-18 00:00:31,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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) [2022-03-18 00:00:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-18 00:00:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 00:00:31,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:31,279 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:31,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-18 00:00:31,495 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,SelfDestructingSolverStorable24 [2022-03-18 00:00:31,495 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:31,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1423660838, now seen corresponding path program 37 times [2022-03-18 00:00:31,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:31,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401058502] [2022-03-18 00:00:31,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:31,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1423660838, now seen corresponding path program 38 times [2022-03-18 00:00:31,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:31,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381720672] [2022-03-18 00:00:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:31,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:31,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:31,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:31,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381720672] [2022-03-18 00:00:31,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381720672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:31,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071965169] [2022-03-18 00:00:31,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:31,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:31,710 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) [2022-03-18 00:00:31,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:00:31,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:31,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:31,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 00:00:31,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:32,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071965169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:32,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:32,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 42 [2022-03-18 00:00:32,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401058502] [2022-03-18 00:00:32,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401058502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:32,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:32,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:00:32,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517459220] [2022-03-18 00:00:32,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:32,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:00:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:00:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=1058, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:00:32,490 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 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) [2022-03-18 00:00:32,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:32,955 INFO L93 Difference]: Finished difference Result 163 states and 206 transitions. [2022-03-18 00:00:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:00:32,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 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 [2022-03-18 00:00:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:32,956 INFO L225 Difference]: With dead ends: 163 [2022-03-18 00:00:32,957 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 00:00:32,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=2412, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:00:32,959 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 225 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:32,961 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 50 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:32,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 00:00:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-03-18 00:00:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 88 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-18 00:00:32,979 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 86 [2022-03-18 00:00:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:32,980 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-18 00:00:32,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 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) [2022-03-18 00:00:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-18 00:00:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 00:00:32,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:32,980 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:33,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 00:00:33,197 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,SelfDestructingSolverStorable25 [2022-03-18 00:00:33,197 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:33,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash 590969713, now seen corresponding path program 39 times [2022-03-18 00:00:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:33,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531591658] [2022-03-18 00:00:33,199 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:33,199 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash 590969713, now seen corresponding path program 40 times [2022-03-18 00:00:33,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:33,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608592303] [2022-03-18 00:00:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:33,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608592303] [2022-03-18 00:00:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608592303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712007706] [2022-03-18 00:00:33,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:33,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:33,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:33,460 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) [2022-03-18 00:00:33,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:00:33,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:33,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:00:33,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 377 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:33,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 377 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:34,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712007706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:34,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:34,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 60 [2022-03-18 00:00:34,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:34,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531591658] [2022-03-18 00:00:34,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531591658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:34,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:34,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:00:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907809309] [2022-03-18 00:00:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:34,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:00:34,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:00:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=2691, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:00:34,201 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 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) [2022-03-18 00:00:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:34,772 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2022-03-18 00:00:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:00:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 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 89 [2022-03-18 00:00:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:34,773 INFO L225 Difference]: With dead ends: 169 [2022-03-18 00:00:34,773 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 00:00:34,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1321, Invalid=4841, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:00:34,775 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:34,775 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 50 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 00:00:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-03-18 00:00:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 91 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2022-03-18 00:00:34,788 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 89 [2022-03-18 00:00:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:34,789 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2022-03-18 00:00:34,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 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) [2022-03-18 00:00:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2022-03-18 00:00:34,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 00:00:34,789 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:34,789 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:34,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-18 00:00:34,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 00:00:35,000 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash 576720250, now seen corresponding path program 41 times [2022-03-18 00:00:35,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:35,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317652439] [2022-03-18 00:00:35,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:35,001 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash 576720250, now seen corresponding path program 42 times [2022-03-18 00:00:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:35,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121831753] [2022-03-18 00:00:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:35,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:35,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121831753] [2022-03-18 00:00:35,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121831753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:35,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552897016] [2022-03-18 00:00:35,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:35,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:35,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:35,292 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) [2022-03-18 00:00:35,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:00:35,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:35,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-18 00:00:35,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-18 00:00:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552897016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:35,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 29 [2022-03-18 00:00:35,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317652439] [2022-03-18 00:00:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317652439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:35,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:00:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891402764] [2022-03-18 00:00:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:35,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:00:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:35,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:00:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:00:35,730 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 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) [2022-03-18 00:00:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:36,232 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2022-03-18 00:00:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:00:36,233 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 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 [2022-03-18 00:00:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:36,234 INFO L225 Difference]: With dead ends: 175 [2022-03-18 00:00:36,234 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 00:00:36,236 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1556, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:00:36,236 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 228 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:36,236 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 45 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:00:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 00:00:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-18 00:00:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 94 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-03-18 00:00:36,269 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 92 [2022-03-18 00:00:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:36,269 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-03-18 00:00:36,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 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) [2022-03-18 00:00:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-03-18 00:00:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 00:00:36,270 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:36,270 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 19, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:36,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:36,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:36,487 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1272730321, now seen corresponding path program 43 times [2022-03-18 00:00:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [332693696] [2022-03-18 00:00:36,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:36,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:36,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1272730321, now seen corresponding path program 44 times [2022-03-18 00:00:36,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:36,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621314560] [2022-03-18 00:00:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:36,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:36,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621314560] [2022-03-18 00:00:36,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621314560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585420946] [2022-03-18 00:00:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:36,863 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) [2022-03-18 00:00:36,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:00:37,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:37,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 00:00:37,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:37,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:00:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585420946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:38,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:38,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 65 [2022-03-18 00:00:38,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [332693696] [2022-03-18 00:00:38,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [332693696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:38,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:38,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:00:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519818556] [2022-03-18 00:00:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:38,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:00:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:00:38,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1388, Invalid=2772, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 00:00:38,104 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 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) [2022-03-18 00:00:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:38,650 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2022-03-18 00:00:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:00:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 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 95 [2022-03-18 00:00:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:38,651 INFO L225 Difference]: With dead ends: 179 [2022-03-18 00:00:38,651 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 00:00:38,652 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2333, Invalid=4977, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:00:38,652 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:38,653 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 40 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 00:00:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 00:00:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.268041237113402) internal successors, (123), 97 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-18 00:00:38,668 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 95 [2022-03-18 00:00:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:38,668 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-18 00:00:38,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 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) [2022-03-18 00:00:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-18 00:00:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 00:00:38,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:38,669 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:38,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:38,872 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,SelfDestructingSolverStorable28 [2022-03-18 00:00:38,872 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:38,873 INFO L85 PathProgramCache]: Analyzing trace with hash 6650394, now seen corresponding path program 45 times [2022-03-18 00:00:38,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:38,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1171917289] [2022-03-18 00:00:38,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:38,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash 6650394, now seen corresponding path program 46 times [2022-03-18 00:00:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:38,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569775320] [2022-03-18 00:00:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:38,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:38,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-03-18 00:00:38,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:38,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569775320] [2022-03-18 00:00:38,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569775320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:38,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874747015] [2022-03-18 00:00:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:38,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:38,941 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) [2022-03-18 00:00:38,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:00:39,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:00:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 533 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:39,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 533 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 00:00:39,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874747015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:39,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:39,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 25, 25] total 50 [2022-03-18 00:00:39,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1171917289] [2022-03-18 00:00:39,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1171917289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:39,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:39,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:00:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877355886] [2022-03-18 00:00:39,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:39,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:00:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:00:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=1636, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:00:39,790 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-18 00:00:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:39,944 INFO L93 Difference]: Finished difference Result 258 states and 330 transitions. [2022-03-18 00:00:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:00:39,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 98 [2022-03-18 00:00:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:39,945 INFO L225 Difference]: With dead ends: 258 [2022-03-18 00:00:39,945 INFO L226 Difference]: Without dead ends: 242 [2022-03-18 00:00:39,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=832, Invalid=1924, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:00:39,947 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:39,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 29 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-18 00:00:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 166. [2022-03-18 00:00:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.29375) internal successors, (207), 160 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2022-03-18 00:00:40,000 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 98 [2022-03-18 00:00:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:40,000 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2022-03-18 00:00:40,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-18 00:00:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2022-03-18 00:00:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 00:00:40,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:40,001 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 40, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:40,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:40,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:40,216 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 576417944, now seen corresponding path program 47 times [2022-03-18 00:00:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:40,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760832993] [2022-03-18 00:00:40,217 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:40,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash 576417944, now seen corresponding path program 48 times [2022-03-18 00:00:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:40,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404333078] [2022-03-18 00:00:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:40,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1245 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2022-03-18 00:00:40,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404333078] [2022-03-18 00:00:40,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404333078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322389703] [2022-03-18 00:00:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:40,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:40,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:40,362 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) [2022-03-18 00:00:40,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:00:40,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:40,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:40,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-03-18 00:00:40,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-03-18 00:00:40,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322389703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:40,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:40,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-18 00:00:40,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:40,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760832993] [2022-03-18 00:00:40,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760832993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:40,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:40,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:00:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631984959] [2022-03-18 00:00:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:40,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:00:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:00:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:00:41,003 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2022-03-18 00:00:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:41,182 INFO L93 Difference]: Finished difference Result 329 states and 424 transitions. [2022-03-18 00:00:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:00:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 161 [2022-03-18 00:00:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:41,184 INFO L225 Difference]: With dead ends: 329 [2022-03-18 00:00:41,184 INFO L226 Difference]: Without dead ends: 313 [2022-03-18 00:00:41,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:00:41,184 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:41,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 39 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-18 00:00:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 229. [2022-03-18 00:00:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.304932735426009) internal successors, (291), 223 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 296 transitions. [2022-03-18 00:00:41,236 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 296 transitions. Word has length 161 [2022-03-18 00:00:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:41,236 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 296 transitions. [2022-03-18 00:00:41,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2022-03-18 00:00:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 296 transitions. [2022-03-18 00:00:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-18 00:00:41,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:41,239 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 60, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:41,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:41,451 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,SelfDestructingSolverStorable30 [2022-03-18 00:00:41,451 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash 54436442, now seen corresponding path program 49 times [2022-03-18 00:00:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638756612] [2022-03-18 00:00:41,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:41,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash 54436442, now seen corresponding path program 50 times [2022-03-18 00:00:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987984223] [2022-03-18 00:00:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:41,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:41,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-18 00:00:41,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:41,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987984223] [2022-03-18 00:00:41,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987984223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:41,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177101726] [2022-03-18 00:00:41,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:41,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:41,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:41,601 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) [2022-03-18 00:00:41,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:00:41,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:41,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:00:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-18 00:00:42,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-18 00:00:42,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177101726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:42,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:42,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-18 00:00:42,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638756612] [2022-03-18 00:00:42,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638756612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:42,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:42,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:00:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554406385] [2022-03-18 00:00:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:42,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:00:42,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:00:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:00:42,871 INFO L87 Difference]: Start difference. First operand 229 states and 296 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2022-03-18 00:00:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:43,087 INFO L93 Difference]: Finished difference Result 400 states and 518 transitions. [2022-03-18 00:00:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:00:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 224 [2022-03-18 00:00:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:43,090 INFO L225 Difference]: With dead ends: 400 [2022-03-18 00:00:43,090 INFO L226 Difference]: Without dead ends: 384 [2022-03-18 00:00:43,090 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:00:43,090 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:43,091 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 29 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-18 00:00:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 292. [2022-03-18 00:00:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.3111888111888113) internal successors, (375), 286 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 380 transitions. [2022-03-18 00:00:43,159 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 380 transitions. Word has length 224 [2022-03-18 00:00:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:43,159 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 380 transitions. [2022-03-18 00:00:43,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-03-18 00:00:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 380 transitions. [2022-03-18 00:00:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-03-18 00:00:43,161 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:43,161 INFO L500 BasicCegarLoop]: trace histogram [80, 80, 80, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:43,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:43,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:43,371 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash -381796264, now seen corresponding path program 51 times [2022-03-18 00:00:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:43,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2072811450] [2022-03-18 00:00:43,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:43,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash -381796264, now seen corresponding path program 52 times [2022-03-18 00:00:43,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:43,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393084680] [2022-03-18 00:00:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:43,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2396 trivial. 0 not checked. [2022-03-18 00:00:43,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:43,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393084680] [2022-03-18 00:00:43,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393084680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:43,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596079220] [2022-03-18 00:00:43,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:43,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:43,606 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) [2022-03-18 00:00:43,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:00:43,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:00:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 536 proven. 3599 refuted. 0 times theorem prover too weak. 5723 trivial. 0 not checked. [2022-03-18 00:00:44,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 536 proven. 3599 refuted. 0 times theorem prover too weak. 5723 trivial. 0 not checked. [2022-03-18 00:00:45,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596079220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:45,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:45,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25, 25] total 53 [2022-03-18 00:00:45,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2072811450] [2022-03-18 00:00:45,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2072811450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:45,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:45,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:00:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122666570] [2022-03-18 00:00:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:45,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:00:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:00:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1924, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:00:45,146 INFO L87 Difference]: Start difference. First operand 292 states and 380 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2022-03-18 00:00:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:45,458 INFO L93 Difference]: Finished difference Result 406 states and 525 transitions. [2022-03-18 00:00:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:00:45,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 287 [2022-03-18 00:00:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:45,459 INFO L225 Difference]: With dead ends: 406 [2022-03-18 00:00:45,459 INFO L226 Difference]: Without dead ends: 390 [2022-03-18 00:00:45,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=886, Invalid=2536, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:00:45,461 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 220 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:45,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-18 00:00:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 355. [2022-03-18 00:00:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.3151862464183381) internal successors, (459), 349 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 464 transitions. [2022-03-18 00:00:45,534 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 464 transitions. Word has length 287 [2022-03-18 00:00:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:45,534 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 464 transitions. [2022-03-18 00:00:45,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2022-03-18 00:00:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 464 transitions. [2022-03-18 00:00:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-03-18 00:00:45,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:45,536 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:45,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:45,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:45,744 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash 587258522, now seen corresponding path program 53 times [2022-03-18 00:00:45,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:45,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542759359] [2022-03-18 00:00:45,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:45,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash 587258522, now seen corresponding path program 54 times [2022-03-18 00:00:45,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:45,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040920243] [2022-03-18 00:00:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:45,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:46,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:46,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:46,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040920243] [2022-03-18 00:00:46,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040920243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:46,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700219297] [2022-03-18 00:00:46,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:46,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:46,077 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) [2022-03-18 00:00:46,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:00:46,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:00:46,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:00:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:46,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:47,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700219297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:47,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:47,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-18 00:00:47,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:47,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542759359] [2022-03-18 00:00:47,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542759359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:47,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:47,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:00:47,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649188312] [2022-03-18 00:00:47,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:47,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:00:47,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:00:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:00:47,424 INFO L87 Difference]: Start difference. First operand 355 states and 464 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-18 00:00:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:47,651 INFO L93 Difference]: Finished difference Result 379 states and 491 transitions. [2022-03-18 00:00:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:00:47,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 350 [2022-03-18 00:00:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:47,653 INFO L225 Difference]: With dead ends: 379 [2022-03-18 00:00:47,653 INFO L226 Difference]: Without dead ends: 368 [2022-03-18 00:00:47,654 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:00:47,654 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:47,654 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-03-18 00:00:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2022-03-18 00:00:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.3125) internal successors, (462), 352 states have internal predecessors, (462), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 467 transitions. [2022-03-18 00:00:47,754 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 467 transitions. Word has length 350 [2022-03-18 00:00:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:47,755 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 467 transitions. [2022-03-18 00:00:47,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-18 00:00:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 467 transitions. [2022-03-18 00:00:47,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-03-18 00:00:47,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:47,757 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:47,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-18 00:00:47,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:47,957 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1194423610, now seen corresponding path program 55 times [2022-03-18 00:00:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:47,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [652137601] [2022-03-18 00:00:47,959 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:47,960 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1194423610, now seen corresponding path program 56 times [2022-03-18 00:00:47,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:47,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857377247] [2022-03-18 00:00:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:47,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:48,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:48,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:48,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857377247] [2022-03-18 00:00:48,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857377247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:48,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668878058] [2022-03-18 00:00:48,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:48,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:48,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:48,326 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) [2022-03-18 00:00:48,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:00:48,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:48,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:48,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:00:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:49,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:50,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668878058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:50,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:50,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-03-18 00:00:50,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:50,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [652137601] [2022-03-18 00:00:50,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [652137601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:50,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:50,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:00:50,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493932683] [2022-03-18 00:00:50,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:50,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:00:50,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:00:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:00:50,034 INFO L87 Difference]: Start difference. First operand 358 states and 467 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-03-18 00:00:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:50,255 INFO L93 Difference]: Finished difference Result 386 states and 499 transitions. [2022-03-18 00:00:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:00:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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 353 [2022-03-18 00:00:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:50,257 INFO L225 Difference]: With dead ends: 386 [2022-03-18 00:00:50,257 INFO L226 Difference]: Without dead ends: 375 [2022-03-18 00:00:50,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:00:50,257 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:50,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-18 00:00:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 361. [2022-03-18 00:00:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.3098591549295775) internal successors, (465), 355 states have internal predecessors, (465), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 470 transitions. [2022-03-18 00:00:50,340 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 470 transitions. Word has length 353 [2022-03-18 00:00:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:50,340 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 470 transitions. [2022-03-18 00:00:50,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-03-18 00:00:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 470 transitions. [2022-03-18 00:00:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-18 00:00:50,342 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:50,342 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:50,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:50,564 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,SelfDestructingSolverStorable34 [2022-03-18 00:00:50,564 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1152690534, now seen corresponding path program 57 times [2022-03-18 00:00:50,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:50,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2069838283] [2022-03-18 00:00:50,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:50,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:50,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1152690534, now seen corresponding path program 58 times [2022-03-18 00:00:50,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:50,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574677220] [2022-03-18 00:00:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:50,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:50,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:50,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:50,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574677220] [2022-03-18 00:00:50,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574677220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:50,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31119590] [2022-03-18 00:00:50,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:00:50,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:50,824 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) [2022-03-18 00:00:50,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 00:00:51,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:00:51,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1958 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 00:00:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 537 proven. 4790 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-18 00:00:52,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 537 proven. 4790 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-18 00:00:52,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31119590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:52,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:52,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 27, 27] total 54 [2022-03-18 00:00:52,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2069838283] [2022-03-18 00:00:52,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2069838283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:52,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:52,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:00:52,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869512267] [2022-03-18 00:00:52,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:52,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:00:52,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:00:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2044, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:00:52,801 INFO L87 Difference]: Start difference. First operand 361 states and 470 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2022-03-18 00:00:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:53,109 INFO L93 Difference]: Finished difference Result 393 states and 507 transitions. [2022-03-18 00:00:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:00:53,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 356 [2022-03-18 00:00:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:53,111 INFO L225 Difference]: With dead ends: 393 [2022-03-18 00:00:53,111 INFO L226 Difference]: Without dead ends: 382 [2022-03-18 00:00:53,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=894, Invalid=2528, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:00:53,112 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:53,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 39 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-18 00:00:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 364. [2022-03-18 00:00:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.3072625698324023) internal successors, (468), 358 states have internal predecessors, (468), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 473 transitions. [2022-03-18 00:00:53,199 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 473 transitions. Word has length 356 [2022-03-18 00:00:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:53,200 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 473 transitions. [2022-03-18 00:00:53,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2022-03-18 00:00:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 473 transitions. [2022-03-18 00:00:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-03-18 00:00:53,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:53,201 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:53,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:53,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 00:00:53,415 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1962575558, now seen corresponding path program 59 times [2022-03-18 00:00:53,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:53,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [604542763] [2022-03-18 00:00:53,417 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:53,417 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1962575558, now seen corresponding path program 60 times [2022-03-18 00:00:53,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:53,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295805382] [2022-03-18 00:00:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:53,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:53,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:53,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295805382] [2022-03-18 00:00:53,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295805382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:53,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557594850] [2022-03-18 00:00:53,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:00:53,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:53,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:53,712 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) [2022-03-18 00:00:53,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 00:00:55,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 00:00:55,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:00:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:55,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:56,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557594850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:56,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:56,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-18 00:00:56,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:56,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [604542763] [2022-03-18 00:00:56,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [604542763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:56,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:56,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:00:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127074184] [2022-03-18 00:00:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:56,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:00:56,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:00:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:00:56,455 INFO L87 Difference]: Start difference. First operand 364 states and 473 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-03-18 00:00:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:56,769 INFO L93 Difference]: Finished difference Result 464 states and 600 transitions. [2022-03-18 00:00:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:00:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 359 [2022-03-18 00:00:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:56,771 INFO L225 Difference]: With dead ends: 464 [2022-03-18 00:00:56,771 INFO L226 Difference]: Without dead ends: 453 [2022-03-18 00:00:56,771 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:00:56,771 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:56,772 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 44 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-18 00:00:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 367. [2022-03-18 00:00:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.3047091412742382) internal successors, (471), 361 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 476 transitions. [2022-03-18 00:00:56,855 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 476 transitions. Word has length 359 [2022-03-18 00:00:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:56,855 INFO L478 AbstractCegarLoop]: Abstraction has 367 states and 476 transitions. [2022-03-18 00:00:56,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-03-18 00:00:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 476 transitions. [2022-03-18 00:00:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-03-18 00:00:56,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:56,857 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:56,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:57,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:57,071 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash -121056614, now seen corresponding path program 61 times [2022-03-18 00:00:57,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543836848] [2022-03-18 00:00:57,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:57,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -121056614, now seen corresponding path program 62 times [2022-03-18 00:00:57,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:57,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450618093] [2022-03-18 00:00:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:57,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:57,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:57,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450618093] [2022-03-18 00:00:57,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450618093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:00:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171598307] [2022-03-18 00:00:57,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:57,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:57,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:57,365 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) [2022-03-18 00:00:57,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 00:00:57,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:57,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:00:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:58,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:00:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:00:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171598307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:00:59,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:00:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-18 00:00:59,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:59,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543836848] [2022-03-18 00:00:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543836848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:59,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:59,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:00:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934346949] [2022-03-18 00:00:59,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:59,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:00:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:00:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:00:59,159 INFO L87 Difference]: Start difference. First operand 367 states and 476 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2022-03-18 00:00:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:59,544 INFO L93 Difference]: Finished difference Result 539 states and 699 transitions. [2022-03-18 00:00:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:00:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 362 [2022-03-18 00:00:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:59,546 INFO L225 Difference]: With dead ends: 539 [2022-03-18 00:00:59,546 INFO L226 Difference]: Without dead ends: 528 [2022-03-18 00:00:59,546 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:00:59,547 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:59,547 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 47 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:00:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-18 00:00:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 370. [2022-03-18 00:00:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.3021978021978022) internal successors, (474), 364 states have internal predecessors, (474), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 479 transitions. [2022-03-18 00:00:59,655 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 479 transitions. Word has length 362 [2022-03-18 00:00:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:59,655 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 479 transitions. [2022-03-18 00:00:59,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2022-03-18 00:00:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 479 transitions. [2022-03-18 00:00:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-18 00:00:59,657 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:59,657 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:59,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:59,857 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,SelfDestructingSolverStorable37 [2022-03-18 00:00:59,857 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash 952532282, now seen corresponding path program 63 times [2022-03-18 00:00:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:59,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [842685487] [2022-03-18 00:00:59,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:59,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash 952532282, now seen corresponding path program 64 times [2022-03-18 00:00:59,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:59,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189377420] [2022-03-18 00:00:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:59,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:00,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:01:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:01:00,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:01:00,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189377420] [2022-03-18 00:01:00,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189377420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:01:00,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831215763] [2022-03-18 00:01:00,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:01:00,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:01:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:01:00,133 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) [2022-03-18 00:01:00,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 00:01:00,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:01:00,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:01:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 00:01:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:01:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 537 proven. 4829 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-18 00:01:01,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:01:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 537 proven. 4829 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-18 00:01:02,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831215763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:01:02,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:01:02,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 30, 30] total 60 [2022-03-18 00:01:02,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:01:02,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [842685487] [2022-03-18 00:01:02,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [842685487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:01:02,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:01:02,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:01:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166060675] [2022-03-18 00:01:02,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:01:02,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:01:02,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:01:02,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:01:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:01:02,163 INFO L87 Difference]: Start difference. First operand 370 states and 479 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2022-03-18 00:01:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:01:02,635 INFO L93 Difference]: Finished difference Result 614 states and 798 transitions. [2022-03-18 00:01:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:01:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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 365 [2022-03-18 00:01:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:01:02,637 INFO L225 Difference]: With dead ends: 614 [2022-03-18 00:01:02,637 INFO L226 Difference]: Without dead ends: 603 [2022-03-18 00:01:02,638 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:01:02,638 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:01:02,638 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 42 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:01:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-18 00:01:02,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 373. [2022-03-18 00:01:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 367 states have (on average 1.2997275204359673) internal successors, (477), 367 states have internal predecessors, (477), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:01:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 482 transitions. [2022-03-18 00:01:02,728 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 482 transitions. Word has length 365 [2022-03-18 00:01:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:01:02,729 INFO L478 AbstractCegarLoop]: Abstraction has 373 states and 482 transitions. [2022-03-18 00:01:02,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 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) [2022-03-18 00:01:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 482 transitions. [2022-03-18 00:01:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-03-18 00:01:02,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:01:02,730 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 7, 7, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:01:02,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-18 00:01:02,931 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,SelfDestructingSolverStorable38 [2022-03-18 00:01:02,931 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:01:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:01:02,931 INFO L85 PathProgramCache]: Analyzing trace with hash -382120294, now seen corresponding path program 65 times [2022-03-18 00:01:02,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:01:02,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749762119] [2022-03-18 00:01:02,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:01:02,933 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:01:02,933 INFO L85 PathProgramCache]: Analyzing trace with hash -382120294, now seen corresponding path program 66 times [2022-03-18 00:01:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:01:02,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536622905] [2022-03-18 00:01:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:01:02,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:01:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:03,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:01:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15490 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-18 00:01:03,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:01:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536622905] [2022-03-18 00:01:03,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536622905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:01:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936864820] [2022-03-18 00:01:03,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:01:03,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:01:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:01:03,272 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) [2022-03-18 00:01:03,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 00:01:15,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 00:01:15,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:01:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 00:01:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:01:15,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-03-18 00:01:15,390 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-18 00:01:15,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-18 00:01:15,516 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-18 00:01:15,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-18 00:01:15,636 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-18 00:01:15,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-18 00:01:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:15,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 00:01:15,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 00:01:15,726 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-18 00:01:15,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 58 [2022-03-18 00:01:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:15,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:15,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 00:01:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 00:01:15,977 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-18 00:01:15,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 73 [2022-03-18 00:01:16,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 00:01:16,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:16,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:16,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 00:01:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 00:01:16,588 INFO L356 Elim1Store]: treesize reduction 99, result has 19.5 percent of original size [2022-03-18 00:01:16,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 81 treesize of output 91 [2022-03-18 00:01:16,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:01:16,768 INFO L356 Elim1Store]: treesize reduction 50, result has 35.1 percent of original size [2022-03-18 00:01:16,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 61 [2022-03-18 00:01:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15490 backedges. 519 proven. 17 refuted. 0 times theorem prover too weak. 14954 trivial. 0 not checked. [2022-03-18 00:01:17,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:01:23,897 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_1176 Int)) (or (not (<= v_main_~x~0_1176 (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)))) (forall ((v_ArrVal_6099 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0)) (.cse2 (* c_main_~j~0 4))) (<= (select .cse0 (+ (* 4 (select (select .cse1 |c_main_~#Dest~0.base|) (+ .cse2 4 |c_main_~#Dest~0.offset|))) |c_main_~#distance~0.offset|)) (+ (select .cse0 (+ (* (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| .cse2 4)) 4) |c_main_~#distance~0.offset|)) (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| .cse2 4))))))))) is different from false [2022-03-18 00:02:07,596 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (not (< (+ main_~i~0 1) c_main_~nodecount~0)) (< (+ main_~i~0 2) c_main_~nodecount~0) (forall ((v_ArrVal_6098 Int) (v_ArrVal_6096 Int) (v_main_~x~0_1176 Int) (v_ArrVal_6099 Int)) (let ((.cse2 (let ((.cse3 (* main_~i~0 4))) (store (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| .cse3) v_ArrVal_6096) (+ 4 |c_main_~#distance~0.offset| .cse3) v_ArrVal_6098)))) (or (let ((.cse0 (store .cse2 (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) 4) |c_main_~#distance~0.offset|)) (+ (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| 4)) (select .cse0 (+ (* 4 (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| 4))) |c_main_~#distance~0.offset|)))))) (not (<= v_main_~x~0_1176 (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse2) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|))) (not (<= c_~INFINITY~0 v_ArrVal_6098)) (not (<= v_ArrVal_6096 c_~INFINITY~0))))))) is different from false [2022-03-18 00:02:08,567 INFO L356 Elim1Store]: treesize reduction 414, result has 23.8 percent of original size [2022-03-18 00:02:08,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 34154 treesize of output 15154