/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_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:45:52,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:45:52,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:45:52,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 17:45:52,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 17:45:52,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 17:45:52,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 17:45:52,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 17:45:52,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 17:45:52,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 17:45:52,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 17:45:52,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 17:45:52,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 17:45:52,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 17:45:52,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 17:45:52,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 17:45:52,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 17:45:52,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 17:45:52,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 17:45:52,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 17:45:52,525 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 17:45:52,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 17:45:52,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 17:45:52,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 17:45:52,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 17:45:52,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 17:45:52,530 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 17:45:52,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 17:45:52,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 17:45:52,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 17:45:52,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 17:45:52,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 17:45:52,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 17:45:52,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 17:45:52,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 17:45:52,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 17:45:52,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 17:45:52,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 17:45:52,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 17:45:52,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:45:52,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:45:52,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:45:52,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:45:52,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:45:52,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:45:52,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:45:52,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:45:52,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:45:52,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:52,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:45:52,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:45:52,557 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:45:52,557 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:45:52,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:45:52,557 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:45:52,557 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:45:52,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:45:52,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:45:52,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:45:52,725 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:45:52,726 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:45:52,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2022-03-20 17:45:52,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b1ef9da/6d7f232546ea4c3b8621aa9bf04e823f/FLAG74f71022e [2022-03-20 17:45:53,175 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:45:53,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c [2022-03-20 17:45:53,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b1ef9da/6d7f232546ea4c3b8621aa9bf04e823f/FLAG74f71022e [2022-03-20 17:45:53,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b1ef9da/6d7f232546ea4c3b8621aa9bf04e823f [2022-03-20 17:45:53,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:45:53,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:45:53,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:53,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:45:53,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:45:53,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d402d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53, skipping insertion in model container [2022-03-20 17:45:53,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:45:53,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:45:53,783 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_01-1.c[446,459] [2022-03-20 17:45:53,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:53,821 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:45:53,828 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_01-1.c[446,459] [2022-03-20 17:45:53,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:53,866 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:45:53,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53 WrapperNode [2022-03-20 17:45:53,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:53,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:45:53,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:45:53,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:45:53,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:45:53,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:45:53,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:45:53,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:45:53,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:53,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:53,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:45:53,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:45:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:45:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:45:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 17:45:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:45:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:45:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:45:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:45:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 17:45:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:45:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:45:53,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:45:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:45:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:45:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:45:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:45:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:45:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:45:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:45:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:45:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:45:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:45:54,031 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:45:54,032 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:45:54,214 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:45:54,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:45:54,218 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-20 17:45:54,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:54 BoogieIcfgContainer [2022-03-20 17:45:54,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:45:54,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:45:54,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:45:54,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:45:54,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:45:53" (1/3) ... [2022-03-20 17:45:54,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deda729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:54, skipping insertion in model container [2022-03-20 17:45:54,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (2/3) ... [2022-03-20 17:45:54,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deda729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:54, skipping insertion in model container [2022-03-20 17:45:54,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:54" (3/3) ... [2022-03-20 17:45:54,225 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2022-03-20 17:45:54,228 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:45:54,228 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:45:54,261 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:45:54,266 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:45:54,266 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:45:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:45:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 17:45:54,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:54,281 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:54,281 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:54,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 1 times [2022-03-20 17:45:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810403524] [2022-03-20 17:45:54,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:45:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 2 times [2022-03-20 17:45:54,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929849725] [2022-03-20 17:45:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:54,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929849725] [2022-03-20 17:45:54,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929849725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:45:54,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:54,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810403524] [2022-03-20 17:45:54,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810403524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:45:54,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337522638] [2022-03-20 17:45:54,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:54,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:45:54,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:45:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:45:54,488 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:54,551 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-03-20 17:45:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:45:54,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 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 19 [2022-03-20 17:45:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:54,562 INFO L225 Difference]: With dead ends: 63 [2022-03-20 17:45:54,562 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 17:45:54,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:45:54,566 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 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 [2022-03-20 17:45:54,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:45:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 17:45:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 17:45:54,601 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) [2022-03-20 17:45:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-20 17:45:54,604 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2022-03-20 17:45:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:54,605 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-20 17:45:54,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-20 17:45:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 17:45:54,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:54,607 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:54,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:45:54,608 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 1 times [2022-03-20 17:45:54,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985595298] [2022-03-20 17:45:54,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:45:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 2 times [2022-03-20 17:45:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:54,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899485886] [2022-03-20 17:45:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:54,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:54,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899485886] [2022-03-20 17:45:54,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899485886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:45:54,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:54,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985595298] [2022-03-20 17:45:54,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985595298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:45:54,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493430329] [2022-03-20 17:45:54,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:54,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:45:54,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:45:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:45:54,720 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:54,851 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-20 17:45:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:45:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 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 19 [2022-03-20 17:45:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:54,853 INFO L225 Difference]: With dead ends: 80 [2022-03-20 17:45:54,853 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 17:45:54,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:45:54,855 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:54,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 36 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:45:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 17:45:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-03-20 17:45:54,862 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) [2022-03-20 17:45:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-20 17:45:54,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2022-03-20 17:45:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:54,863 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-20 17:45:54,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-20 17:45:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 17:45:54,864 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:54,864 INFO L499 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] [2022-03-20 17:45:54,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:45:54,864 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 1 times [2022-03-20 17:45:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959605072] [2022-03-20 17:45:54,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:54,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 2 times [2022-03-20 17:45:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:54,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605227872] [2022-03-20 17:45:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:54,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:55,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:55,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605227872] [2022-03-20 17:45:55,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605227872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988266563] [2022-03-20 17:45:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:55,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:55,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:55,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:45:55,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:55,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:45:55,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:55,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-20 17:45:55,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-20 17:45:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:55,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-20 17:45:55,360 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 26 treesize of output 24 [2022-03-20 17:45:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988266563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:45:55,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:45:55,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 17:45:55,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959605072] [2022-03-20 17:45:55,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959605072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:55,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:55,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:45:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746746873] [2022-03-20 17:45:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:55,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:45:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:45:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:45:55,386 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:55,614 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-03-20 17:45:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:45:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 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 25 [2022-03-20 17:45:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:55,615 INFO L225 Difference]: With dead ends: 78 [2022-03-20 17:45:55,615 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 17:45:55,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:45:55,617 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:55,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:45:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 17:45:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-03-20 17:45:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:45:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-03-20 17:45:55,625 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 25 [2022-03-20 17:45:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:55,625 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-03-20 17:45:55,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-03-20 17:45:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 17:45:55,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:55,626 INFO L499 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] [2022-03-20 17:45:55,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 17:45:55,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:55,840 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 1 times [2022-03-20 17:45:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:55,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1296458502] [2022-03-20 17:45:55,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:55,842 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 2 times [2022-03-20 17:45:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807006554] [2022-03-20 17:45:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:55,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:55,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807006554] [2022-03-20 17:45:55,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807006554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:55,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:55,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:45:55,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1296458502] [2022-03-20 17:45:55,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1296458502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:55,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:55,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:45:55,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788743412] [2022-03-20 17:45:55,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:55,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:45:55,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:45:55,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:45:55,914 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:55,954 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-03-20 17:45:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:45:55,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 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 25 [2022-03-20 17:45:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:55,956 INFO L225 Difference]: With dead ends: 82 [2022-03-20 17:45:55,956 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 17:45:55,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:45:55,957 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:55,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:45:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 17:45:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 17:45:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:45:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-03-20 17:45:55,964 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2022-03-20 17:45:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:55,964 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-03-20 17:45:55,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-03-20 17:45:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:45:55,965 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:55,965 INFO L499 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] [2022-03-20 17:45:55,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:45:55,965 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 1 times [2022-03-20 17:45:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:55,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843771689] [2022-03-20 17:45:55,966 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:55,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 2 times [2022-03-20 17:45:55,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:55,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310313133] [2022-03-20 17:45:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:56,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:56,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310313133] [2022-03-20 17:45:56,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310313133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958572316] [2022-03-20 17:45:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:56,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:56,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:56,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:45:56,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:56,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:56,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:45:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:56,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:56,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958572316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:45:56,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:45:56,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-03-20 17:45:56,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:56,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843771689] [2022-03-20 17:45:56,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843771689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:56,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:56,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:45:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566821914] [2022-03-20 17:45:56,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:56,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:45:56,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:45:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:45:56,194 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:56,323 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2022-03-20 17:45:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:45:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 17:45:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:56,324 INFO L225 Difference]: With dead ends: 130 [2022-03-20 17:45:56,324 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 17:45:56,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:45:56,325 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:56,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 54 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:45:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 17:45:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2022-03-20 17:45:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 61 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:45:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-03-20 17:45:56,350 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 28 [2022-03-20 17:45:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:56,350 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-03-20 17:45:56,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:56,350 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-03-20 17:45:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:45:56,351 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:56,351 INFO L499 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] [2022-03-20 17:45:56,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:56,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:56,552 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 1 times [2022-03-20 17:45:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:56,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1805718735] [2022-03-20 17:45:56,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:56,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 2 times [2022-03-20 17:45:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964314501] [2022-03-20 17:45:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:56,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:56,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964314501] [2022-03-20 17:45:56,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964314501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:56,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027371034] [2022-03-20 17:45:56,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:56,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:56,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:56,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:56,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:45:56,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 17:45:56,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:56,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027371034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:45:56,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:45:56,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 17:45:56,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1805718735] [2022-03-20 17:45:56,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1805718735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:56,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:56,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:45:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586119633] [2022-03-20 17:45:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:56,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:45:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:45:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:45:56,917 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:57,235 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2022-03-20 17:45:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:45:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 17:45:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:57,237 INFO L225 Difference]: With dead ends: 178 [2022-03-20 17:45:57,237 INFO L226 Difference]: Without dead ends: 148 [2022-03-20 17:45:57,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:45:57,238 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:57,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 73 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:45:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-20 17:45:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 87. [2022-03-20 17:45:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:45:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-03-20 17:45:57,265 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 28 [2022-03-20 17:45:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:57,265 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-03-20 17:45:57,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-03-20 17:45:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:45:57,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:57,268 INFO L499 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, 1, 1] [2022-03-20 17:45:57,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:57,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:57,487 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 1 times [2022-03-20 17:45:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:57,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [396097335] [2022-03-20 17:45:57,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:57,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:57,489 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 2 times [2022-03-20 17:45:57,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:57,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512611609] [2022-03-20 17:45:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:57,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:57,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:57,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:57,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512611609] [2022-03-20 17:45:57,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512611609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:57,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835403198] [2022-03-20 17:45:57,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:57,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:57,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:57,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:45:57,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:57,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:57,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 17:45:57,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:57,996 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 79 treesize of output 77 [2022-03-20 17:45:58,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-03-20 17:45:58,190 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-03-20 17:45:58,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-03-20 17:45:58,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-20 17:45:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:58,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:00,521 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int)) (or (forall ((v_ArrVal_192 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|))) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_9)))) is different from false [2022-03-20 17:46:00,896 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int) (v_ArrVal_192 Int)) (or (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_9)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|)))) is different from false [2022-03-20 17:46:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-03-20 17:46:10,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835403198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:10,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:10,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-03-20 17:46:10,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [396097335] [2022-03-20 17:46:10,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [396097335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:10,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:10,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:46:10,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847595699] [2022-03-20 17:46:10,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:10,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:46:10,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:10,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:46:10,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=591, Unknown=9, NotChecked=102, Total=812 [2022-03-20 17:46:10,792 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:11,356 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2022-03-20 17:46:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:46:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 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 31 [2022-03-20 17:46:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:11,358 INFO L225 Difference]: With dead ends: 177 [2022-03-20 17:46:11,358 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 17:46:11,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=314, Invalid=1245, Unknown=9, NotChecked=154, Total=1722 [2022-03-20 17:46:11,359 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 188 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:11,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 51 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 17:46:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 89. [2022-03-20 17:46:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-03-20 17:46:11,377 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 31 [2022-03-20 17:46:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:11,377 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-03-20 17:46:11,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-03-20 17:46:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:46:11,381 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:11,381 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:11,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 17:46:11,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:11,599 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 3 times [2022-03-20 17:46:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:11,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147547893] [2022-03-20 17:46:11,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:11,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 4 times [2022-03-20 17:46:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:11,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813295414] [2022-03-20 17:46:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:11,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:46:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:11,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813295414] [2022-03-20 17:46:11,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813295414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:11,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217692420] [2022-03-20 17:46:11,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:11,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:11,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:11,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:11,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:46:11,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:11,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 17:46:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:11,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 17:46:11,898 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:46:11,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 17:46:12,192 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-03-20 17:46:12,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-03-20 17:46:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:12,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:12,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217692420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:12,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:12,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 35 [2022-03-20 17:46:12,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147547893] [2022-03-20 17:46:12,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147547893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:12,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:12,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:46:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124080877] [2022-03-20 17:46:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:12,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:46:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:46:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:46:12,601 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:12,968 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2022-03-20 17:46:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:46:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 17:46:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:12,969 INFO L225 Difference]: With dead ends: 218 [2022-03-20 17:46:12,969 INFO L226 Difference]: Without dead ends: 216 [2022-03-20 17:46:12,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 17:46:12,971 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:12,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 62 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-20 17:46:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 112. [2022-03-20 17:46:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 105 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2022-03-20 17:46:12,989 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 31 [2022-03-20 17:46:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:12,990 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2022-03-20 17:46:12,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2022-03-20 17:46:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:46:12,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:12,990 INFO L499 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, 1] [2022-03-20 17:46:13,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:13,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:13,207 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:13,208 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 1 times [2022-03-20 17:46:13,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:13,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1598378445] [2022-03-20 17:46:13,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:13,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 2 times [2022-03-20 17:46:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:13,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456338172] [2022-03-20 17:46:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:13,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 17:46:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:13,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456338172] [2022-03-20 17:46:13,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456338172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700554196] [2022-03-20 17:46:13,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:13,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:13,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:13,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:46:13,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:13,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 17:46:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:13,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700554196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:13,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:13,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 17:46:13,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:13,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1598378445] [2022-03-20 17:46:13,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1598378445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:13,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:13,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:13,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292626543] [2022-03-20 17:46:13,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:13,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:13,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:46:13,543 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:13,758 INFO L93 Difference]: Finished difference Result 254 states and 333 transitions. [2022-03-20 17:46:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:46:13,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-03-20 17:46:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:13,759 INFO L225 Difference]: With dead ends: 254 [2022-03-20 17:46:13,759 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 17:46:13,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:46:13,760 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 152 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:13,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 48 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 17:46:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2022-03-20 17:46:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 124 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2022-03-20 17:46:13,797 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 33 [2022-03-20 17:46:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:13,797 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2022-03-20 17:46:13,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2022-03-20 17:46:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:46:13,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:13,797 INFO L499 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, 1, 1] [2022-03-20 17:46:13,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:14,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:14,028 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 3 times [2022-03-20 17:46:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:14,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869481511] [2022-03-20 17:46:14,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:14,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 4 times [2022-03-20 17:46:14,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:14,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115633254] [2022-03-20 17:46:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:14,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:14,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:14,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115633254] [2022-03-20 17:46:14,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115633254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:14,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908134230] [2022-03-20 17:46:14,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:14,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:14,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:14,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:14,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:46:14,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:14,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 17:46:14,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:14,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:14,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908134230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:14,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:14,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 17:46:14,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869481511] [2022-03-20 17:46:14,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869481511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:14,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:14,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:14,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668694229] [2022-03-20 17:46:14,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:14,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:14,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:46:14,280 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:14,514 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2022-03-20 17:46:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:46:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 17:46:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:14,517 INFO L225 Difference]: With dead ends: 240 [2022-03-20 17:46:14,517 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 17:46:14,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:14,520 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:14,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 68 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 17:46:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2022-03-20 17:46:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 165 states have (on average 1.3393939393939394) internal successors, (221), 167 states have internal predecessors, (221), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-03-20 17:46:14,549 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 34 [2022-03-20 17:46:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:14,550 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-03-20 17:46:14,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-03-20 17:46:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:46:14,551 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:14,551 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:14,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:14,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:14,768 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 5 times [2022-03-20 17:46:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265582016] [2022-03-20 17:46:14,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:14,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 6 times [2022-03-20 17:46:14,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672182064] [2022-03-20 17:46:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:14,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:14,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 17:46:14,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672182064] [2022-03-20 17:46:14,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672182064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380652522] [2022-03-20 17:46:14,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:14,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:14,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:14,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:14,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 17:46:14,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-20 17:46:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 17:46:14,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:46:14,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380652522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:14,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:46:14,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-20 17:46:14,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265582016] [2022-03-20 17:46:14,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265582016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:14,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:14,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:46:14,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297076670] [2022-03-20 17:46:14,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:14,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:46:14,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:46:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:46:14,960 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-20 17:46:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:15,009 INFO L93 Difference]: Finished difference Result 292 states and 382 transitions. [2022-03-20 17:46:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:46:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 34 [2022-03-20 17:46:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:15,010 INFO L225 Difference]: With dead ends: 292 [2022-03-20 17:46:15,010 INFO L226 Difference]: Without dead ends: 154 [2022-03-20 17:46:15,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:46:15,011 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:15,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 70 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-20 17:46:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 139. [2022-03-20 17:46:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 130 states have (on average 1.2846153846153847) internal successors, (167), 132 states have internal predecessors, (167), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-03-20 17:46:15,030 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 34 [2022-03-20 17:46:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:15,030 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-03-20 17:46:15,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-20 17:46:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-03-20 17:46:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:46:15,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:15,031 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:15,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:15,247 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,SelfDestructingSolverStorable10 [2022-03-20 17:46:15,247 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 7 times [2022-03-20 17:46:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158254446] [2022-03-20 17:46:15,248 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:15,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 8 times [2022-03-20 17:46:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283038113] [2022-03-20 17:46:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:15,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:15,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:15,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283038113] [2022-03-20 17:46:15,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283038113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:15,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612812181] [2022-03-20 17:46:15,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:15,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:15,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:15,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:15,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 17:46:15,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 17:46:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:15,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612812181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:15,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-20 17:46:15,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158254446] [2022-03-20 17:46:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158254446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:15,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:15,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913982187] [2022-03-20 17:46:15,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:15,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:15,637 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:16,040 INFO L93 Difference]: Finished difference Result 296 states and 374 transitions. [2022-03-20 17:46:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:46:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 17:46:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:16,042 INFO L225 Difference]: With dead ends: 296 [2022-03-20 17:46:16,042 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 17:46:16,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:46:16,042 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 168 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:16,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 97 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 17:46:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 154. [2022-03-20 17:46:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2022-03-20 17:46:16,093 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 34 [2022-03-20 17:46:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:16,093 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2022-03-20 17:46:16,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2022-03-20 17:46:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:46:16,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:16,094 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:16,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:16,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:16,308 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 5 times [2022-03-20 17:46:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1469839209] [2022-03-20 17:46:16,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:16,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 6 times [2022-03-20 17:46:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:16,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741192704] [2022-03-20 17:46:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741192704] [2022-03-20 17:46:16,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741192704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853738443] [2022-03-20 17:46:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:16,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:16,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:16,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 17:46:16,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 17:46:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:16,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 17:46:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:16,938 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 75 treesize of output 73 [2022-03-20 17:46:17,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:17,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-03-20 17:46:17,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:17,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:17,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:17,222 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-03-20 17:46:17,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2022-03-20 17:46:17,366 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-03-20 17:46:17,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 55 [2022-03-20 17:46:17,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2022-03-20 17:46:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:46:17,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:19,886 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_18 Int)) (or (forall ((v_ArrVal_434 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|))) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_18)))) is different from false [2022-03-20 17:46:20,277 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_main_~x~0_18 Int)) (or (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)))) is different from false [2022-03-20 17:46:21,240 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* 4 c_main_~x~0) |c_main_~#distance~0.offset|) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18))))) is different from false [2022-03-20 17:46:23,264 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_19 Int)) (or (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_19)) (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18))))))) is different from false [2022-03-20 17:46:24,141 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_19 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_19))))) is different from false [2022-03-20 17:46:26,261 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_19 Int) (v_ArrVal_429 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* c_main_~i~0 4) |c_main_~#distance~0.offset|) v_ArrVal_429))) (let ((.cse1 (store .cse0 (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (not (<= 0 v_ArrVal_429)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_19)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse1) |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)) (<= 0 (select (store .cse1 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)))))) is different from false [2022-03-20 17:46:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 7 not checked. [2022-03-20 17:46:26,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853738443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:26,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:26,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 14] total 37 [2022-03-20 17:46:26,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1469839209] [2022-03-20 17:46:26,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1469839209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:26,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:26,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:46:26,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517296574] [2022-03-20 17:46:26,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:26,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:46:26,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:46:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=816, Unknown=6, NotChecked=378, Total=1332 [2022-03-20 17:46:26,336 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:26,873 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2022-03-20 17:46:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:46:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 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 37 [2022-03-20 17:46:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:26,874 INFO L225 Difference]: With dead ends: 187 [2022-03-20 17:46:26,874 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 17:46:26,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=271, Invalid=1553, Unknown=6, NotChecked=522, Total=2352 [2022-03-20 17:46:26,875 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 132 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:26,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 17:46:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2022-03-20 17:46:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 148 states have (on average 1.2905405405405406) internal successors, (191), 150 states have internal predecessors, (191), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 199 transitions. [2022-03-20 17:46:26,911 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 199 transitions. Word has length 37 [2022-03-20 17:46:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:26,912 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 199 transitions. [2022-03-20 17:46:26,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 199 transitions. [2022-03-20 17:46:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:46:26,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:26,912 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:26,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:27,127 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,SelfDestructingSolverStorable12 [2022-03-20 17:46:27,127 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 1 times [2022-03-20 17:46:27,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:27,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82854085] [2022-03-20 17:46:27,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:27,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 2 times [2022-03-20 17:46:27,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:27,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107374647] [2022-03-20 17:46:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:46:27,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:27,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107374647] [2022-03-20 17:46:27,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107374647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:27,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:27,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:27,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:27,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82854085] [2022-03-20 17:46:27,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82854085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:27,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:27,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990282536] [2022-03-20 17:46:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:27,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:27,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:46:27,195 INFO L87 Difference]: Start difference. First operand 157 states and 199 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-20 17:46:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:27,290 INFO L93 Difference]: Finished difference Result 247 states and 314 transitions. [2022-03-20 17:46:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:46:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 37 [2022-03-20 17:46:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:27,291 INFO L225 Difference]: With dead ends: 247 [2022-03-20 17:46:27,291 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 17:46:27,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:46:27,292 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:27,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 17:46:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2022-03-20 17:46:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 148 states have (on average 1.2702702702702702) internal successors, (188), 150 states have internal predecessors, (188), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 196 transitions. [2022-03-20 17:46:27,319 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 196 transitions. Word has length 37 [2022-03-20 17:46:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:27,319 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 196 transitions. [2022-03-20 17:46:27,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-20 17:46:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 196 transitions. [2022-03-20 17:46:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:46:27,320 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:27,320 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:27,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 17:46:27,320 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 9 times [2022-03-20 17:46:27,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:27,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272354763] [2022-03-20 17:46:27,321 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:27,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 10 times [2022-03-20 17:46:27,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:27,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426440124] [2022-03-20 17:46:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:27,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 17:46:27,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426440124] [2022-03-20 17:46:27,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426440124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:27,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820728226] [2022-03-20 17:46:27,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:27,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:27,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:27,514 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:27,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 17:46:27,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:27,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 17:46:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:27,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 17:46:27,617 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:46:27,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 17:46:27,662 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:46:27,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 17:46:28,048 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-03-20 17:46:28,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-03-20 17:46:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:28,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:28,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820728226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:28,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:28,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 40 [2022-03-20 17:46:28,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:28,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [272354763] [2022-03-20 17:46:28,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [272354763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:28,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:28,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:46:28,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095852621] [2022-03-20 17:46:28,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:28,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:46:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:28,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:46:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:46:28,594 INFO L87 Difference]: Start difference. First operand 157 states and 196 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:28,928 INFO L93 Difference]: Finished difference Result 237 states and 298 transitions. [2022-03-20 17:46:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:46:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 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 37 [2022-03-20 17:46:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:28,929 INFO L225 Difference]: With dead ends: 237 [2022-03-20 17:46:28,929 INFO L226 Difference]: Without dead ends: 235 [2022-03-20 17:46:28,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:46:28,932 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:28,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 66 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-20 17:46:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 162. [2022-03-20 17:46:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 155 states have internal predecessors, (195), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-03-20 17:46:28,964 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 37 [2022-03-20 17:46:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:28,964 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-03-20 17:46:28,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-03-20 17:46:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 17:46:28,964 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:28,964 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:28,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:29,180 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,SelfDestructingSolverStorable14 [2022-03-20 17:46:29,181 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 1 times [2022-03-20 17:46:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906656285] [2022-03-20 17:46:29,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:29,182 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:29,182 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 2 times [2022-03-20 17:46:29,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:29,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848712121] [2022-03-20 17:46:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:29,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:29,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 17:46:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:46:29,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848712121] [2022-03-20 17:46:29,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848712121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310303083] [2022-03-20 17:46:29,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:29,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:29,320 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:29,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 17:46:29,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 17:46:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:29,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 17:46:31,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 17:46:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:46:31,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:33,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 17:46:33,699 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 32 treesize of output 28 [2022-03-20 17:46:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:46:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310303083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:33,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:33,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 28 [2022-03-20 17:46:33,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906656285] [2022-03-20 17:46:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906656285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:33,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:33,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:46:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466737804] [2022-03-20 17:46:33,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:33,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:46:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:46:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=654, Unknown=2, NotChecked=0, Total=756 [2022-03-20 17:46:33,800 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:34,306 INFO L93 Difference]: Finished difference Result 232 states and 291 transitions. [2022-03-20 17:46:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:46:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-03-20 17:46:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:34,307 INFO L225 Difference]: With dead ends: 232 [2022-03-20 17:46:34,307 INFO L226 Difference]: Without dead ends: 230 [2022-03-20 17:46:34,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=1249, Unknown=2, NotChecked=0, Total=1482 [2022-03-20 17:46:34,308 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 200 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:34,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 75 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:46:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-20 17:46:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 170. [2022-03-20 17:46:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 161 states have internal predecessors, (201), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:46:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2022-03-20 17:46:34,342 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 39 [2022-03-20 17:46:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:34,342 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2022-03-20 17:46:34,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2022-03-20 17:46:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 17:46:34,343 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:34,343 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-03-20 17:46:34,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:34,560 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,SelfDestructingSolverStorable15 [2022-03-20 17:46:34,560 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 7 times [2022-03-20 17:46:34,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:34,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2016411421] [2022-03-20 17:46:34,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:34,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 8 times [2022-03-20 17:46:34,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:34,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749407406] [2022-03-20 17:46:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:34,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:34,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749407406] [2022-03-20 17:46:34,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749407406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252601217] [2022-03-20 17:46:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:34,655 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:34,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 17:46:34,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:34,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 17:46:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:34,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:34,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252601217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:34,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:34,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-20 17:46:34,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2016411421] [2022-03-20 17:46:34,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2016411421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:34,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:34,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:34,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160184182] [2022-03-20 17:46:34,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:34,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:34,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:34,916 INFO L87 Difference]: Start difference. First operand 170 states and 211 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:35,330 INFO L93 Difference]: Finished difference Result 366 states and 463 transitions. [2022-03-20 17:46:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:46:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-20 17:46:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:35,333 INFO L225 Difference]: With dead ends: 366 [2022-03-20 17:46:35,333 INFO L226 Difference]: Without dead ends: 337 [2022-03-20 17:46:35,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:46:35,334 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:35,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 83 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-20 17:46:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 227. [2022-03-20 17:46:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 216 states have (on average 1.2962962962962963) internal successors, (280), 218 states have internal predecessors, (280), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:46:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 290 transitions. [2022-03-20 17:46:35,390 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 290 transitions. Word has length 40 [2022-03-20 17:46:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:35,390 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 290 transitions. [2022-03-20 17:46:35,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 290 transitions. [2022-03-20 17:46:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 17:46:35,391 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:35,391 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:35,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:35,607 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,SelfDestructingSolverStorable16 [2022-03-20 17:46:35,607 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 3 times [2022-03-20 17:46:35,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:35,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760213736] [2022-03-20 17:46:35,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:35,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 4 times [2022-03-20 17:46:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084603499] [2022-03-20 17:46:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:35,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:36,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:46:36,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084603499] [2022-03-20 17:46:36,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084603499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75875081] [2022-03-20 17:46:36,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:36,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:36,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:36,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 17:46:36,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:36,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 17:46:36,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:36,310 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 84 treesize of output 76 [2022-03-20 17:46:36,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 17:46:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:36,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 17:46:36,703 INFO L356 Elim1Store]: treesize reduction 22, result has 50.0 percent of original size [2022-03-20 17:46:36,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 47 [2022-03-20 17:46:37,211 INFO L356 Elim1Store]: treesize reduction 122, result has 40.5 percent of original size [2022-03-20 17:46:37,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 97 treesize of output 142 [2022-03-20 17:46:43,567 INFO L356 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2022-03-20 17:46:43,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 64 [2022-03-20 17:46:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:43,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:26,851 WARN L232 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 33 DAG size of output: 22 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-03-20 17:47:26,853 INFO L356 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2022-03-20 17:47:26,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 656201695925 treesize of output 618134774101