/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:46:55,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:46:55,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:46:55,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 19:46:55,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 19:46:55,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 19:46:55,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 19:46:55,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 19:46:55,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 19:46:55,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 19:46:55,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 19:46:55,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 19:46:55,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 19:46:55,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 19:46:55,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 19:46:55,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 19:46:55,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 19:46:55,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 19:46:55,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 19:46:55,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 19:46:55,639 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 19:46:55,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 19:46:55,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 19:46:55,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 19:46:55,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 19:46:55,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 19:46:55,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 19:46:55,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 19:46:55,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 19:46:55,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 19:46:55,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 19:46:55,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 19:46:55,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 19:46:55,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 19:46:55,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 19:46:55,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 19:46:55,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 19:46:55,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 19:46:55,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 19:46:55,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:46:55,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:46:55,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:46:55,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:46:55,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:46:55,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:46:55,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:46:55,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:46:55,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:46:55,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:46:55,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:46:55,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:46:55,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:46:55,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:46:55,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:46:55,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:46:55,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:46:55,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:46:55,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:46:55,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:46:55,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:46:55,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:46:55,686 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:46:55,686 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:46:55,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:46:55,686 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:46:55,686 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:46:55,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:46:55,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:46:55,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:46:55,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:46:55,910 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:46:55,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2022-04-06 19:46:55,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c63934d/c0895b42fa6443c387a51d52d8757213/FLAGf356ecba8 [2022-04-06 19:46:56,336 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:46:56,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2022-04-06 19:46:56,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c63934d/c0895b42fa6443c387a51d52d8757213/FLAGf356ecba8 [2022-04-06 19:46:56,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c63934d/c0895b42fa6443c387a51d52d8757213 [2022-04-06 19:46:56,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:46:56,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:46:56,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:46:56,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:46:56,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:46:56,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f1842d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56, skipping insertion in model container [2022-04-06 19:46:56,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:46:56,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:46:56,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c[322,335] [2022-04-06 19:46:56,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:46:56,530 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:46:56,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c[322,335] [2022-04-06 19:46:56,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:46:56,550 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:46:56,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56 WrapperNode [2022-04-06 19:46:56,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:46:56,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:46:56,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:46:56,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:46:56,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:46:56,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:46:56,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:46:56,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:46:56,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (1/1) ... [2022-04-06 19:46:56,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:46:56,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:56,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:46:56,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:46:56,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:46:56,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:46:56,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:46:56,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:46:56,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:46:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:46:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:46:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:46:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:46:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:46:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:46:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:46:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:46:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:46:56,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:46:56,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:46:56,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:46:56,696 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:46:56,697 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:46:56,830 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:46:56,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:46:56,846 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 19:46:56,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:46:56 BoogieIcfgContainer [2022-04-06 19:46:56,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:46:56,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:46:56,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:46:56,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:46:56,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:46:56" (1/3) ... [2022-04-06 19:46:56,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ddecd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:46:56, skipping insertion in model container [2022-04-06 19:46:56,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:46:56" (2/3) ... [2022-04-06 19:46:56,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ddecd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:46:56, skipping insertion in model container [2022-04-06 19:46:56,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:46:56" (3/3) ... [2022-04-06 19:46:56,868 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2022-04-06 19:46:56,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:46:56,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:46:56,926 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:46:56,939 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:46:56,939 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:46:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-04-06 19:46:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:46:56,971 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:56,972 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:56,972 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:56,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 1 times [2022-04-06 19:46:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1466003612] [2022-04-06 19:46:56,999 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:46:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 2 times [2022-04-06 19:46:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407391570] [2022-04-06 19:46:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:57,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:57,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:57,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407391570] [2022-04-06 19:46:57,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407391570] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:57,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:57,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:46:57,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:57,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1466003612] [2022-04-06 19:46:57,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1466003612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:57,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:57,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:46:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337160878] [2022-04-06 19:46:57,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:57,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:46:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:57,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:46:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:46:57,308 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:57,387 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-04-06 19:46:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:46:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-04-06 19:46:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:57,397 INFO L225 Difference]: With dead ends: 37 [2022-04-06 19:46:57,397 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 19:46:57,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:46:57,404 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:57,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:46:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 19:46:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-04-06 19:46:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-06 19:46:57,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-04-06 19:46:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:57,443 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-06 19:46:57,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-06 19:46:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 19:46:57,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:57,445 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:57,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:46:57,447 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2037585725, now seen corresponding path program 1 times [2022-04-06 19:46:57,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:57,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089945245] [2022-04-06 19:46:57,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:57,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2037585725, now seen corresponding path program 2 times [2022-04-06 19:46:57,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:57,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827173904] [2022-04-06 19:46:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:57,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:57,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:57,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:57,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827173904] [2022-04-06 19:46:57,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827173904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:57,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:57,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:46:57,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:57,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089945245] [2022-04-06 19:46:57,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089945245] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:57,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:57,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:46:57,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453571978] [2022-04-06 19:46:57,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:57,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:46:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:46:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:46:57,559 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:57,592 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-04-06 19:46:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:46:57,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 19:46:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:57,594 INFO L225 Difference]: With dead ends: 24 [2022-04-06 19:46:57,594 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 19:46:57,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:46:57,596 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:57,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:46:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 19:46:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-06 19:46:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-04-06 19:46:57,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-04-06 19:46:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:57,614 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-04-06 19:46:57,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-04-06 19:46:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:46:57,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:57,615 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:57,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:46:57,615 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash -183414982, now seen corresponding path program 1 times [2022-04-06 19:46:57,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:57,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910004226] [2022-04-06 19:46:57,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:57,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:57,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash -183414982, now seen corresponding path program 2 times [2022-04-06 19:46:57,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:57,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651162528] [2022-04-06 19:46:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:57,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:57,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:57,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651162528] [2022-04-06 19:46:57,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651162528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:57,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450809930] [2022-04-06 19:46:57,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:57,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:57,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:57,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:57,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:46:57,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:57,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:57,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:46:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:57,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:46:57,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450809930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:57,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:57,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2022-04-06 19:46:57,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910004226] [2022-04-06 19:46:57,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910004226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:57,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:57,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:46:57,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733098456] [2022-04-06 19:46:57,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:57,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:46:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:46:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:46:57,955 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:58,009 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-06 19:46:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:46:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-04-06 19:46:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:58,010 INFO L225 Difference]: With dead ends: 26 [2022-04-06 19:46:58,010 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 19:46:58,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:46:58,011 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:58,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:46:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 19:46:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 19:46:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-06 19:46:58,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-04-06 19:46:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:58,026 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-06 19:46:58,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-06 19:46:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 19:46:58,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:58,027 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:58,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:58,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:58,251 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1461303203, now seen corresponding path program 3 times [2022-04-06 19:46:58,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:58,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208131584] [2022-04-06 19:46:58,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:58,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:58,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1461303203, now seen corresponding path program 4 times [2022-04-06 19:46:58,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525204951] [2022-04-06 19:46:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:58,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525204951] [2022-04-06 19:46:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525204951] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734912332] [2022-04-06 19:46:58,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:58,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:58,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:46:58,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:58,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:58,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:46:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:58,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:58,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734912332] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:58,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:58,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-04-06 19:46:58,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208131584] [2022-04-06 19:46:58,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208131584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:58,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:58,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:46:58,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954092986] [2022-04-06 19:46:58,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:58,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:46:58,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:58,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:46:58,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:46:58,612 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:58,689 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-06 19:46:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:46:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 19:46:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:58,691 INFO L225 Difference]: With dead ends: 28 [2022-04-06 19:46:58,691 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 19:46:58,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:46:58,695 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:58,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:46:58,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 19:46:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 19:46:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 19:46:58,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-04-06 19:46:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:58,702 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 19:46:58,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 19:46:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:46:58,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:58,703 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:58,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:58,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:46:58,920 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash 907959386, now seen corresponding path program 5 times [2022-04-06 19:46:58,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:58,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331546830] [2022-04-06 19:46:58,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:58,935 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:58,935 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 907959386, now seen corresponding path program 6 times [2022-04-06 19:46:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:58,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543222583] [2022-04-06 19:46:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:59,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:59,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543222583] [2022-04-06 19:46:59,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543222583] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408430765] [2022-04-06 19:46:59,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:59,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:59,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:59,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:59,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:46:59,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:46:59,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:46:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:46:59,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:46:59,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408430765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:59,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:59,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-04-06 19:46:59,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331546830] [2022-04-06 19:46:59,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331546830] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:59,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:59,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:46:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827740787] [2022-04-06 19:46:59,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:59,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:46:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:46:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:46:59,186 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:59,276 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-06 19:46:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:46:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 19:46:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:59,277 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:46:59,277 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 19:46:59,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:46:59,280 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:59,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:46:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 19:46:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 19:46:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 19:46:59,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2022-04-06 19:46:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:59,288 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 19:46:59,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 19:46:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 19:46:59,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:59,290 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:59,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:59,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:59,504 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 934170243, now seen corresponding path program 7 times [2022-04-06 19:46:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29512329] [2022-04-06 19:46:59,520 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:59,523 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:59,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash 934170243, now seen corresponding path program 8 times [2022-04-06 19:46:59,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:59,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099986567] [2022-04-06 19:46:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:59,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:59,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099986567] [2022-04-06 19:46:59,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099986567] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574529405] [2022-04-06 19:46:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:59,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:59,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:46:59,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:59,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:46:59,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:46:59,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:46:59,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574529405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:59,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:59,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2022-04-06 19:46:59,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:59,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29512329] [2022-04-06 19:46:59,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29512329] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:59,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:59,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:46:59,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949933325] [2022-04-06 19:46:59,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:59,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:46:59,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:46:59,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:46:59,835 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:59,951 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-06 19:46:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:46:59,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 19:46:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:59,952 INFO L225 Difference]: With dead ends: 32 [2022-04-06 19:46:59,952 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 19:46:59,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:46:59,953 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:59,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:46:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 19:46:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 19:46:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-06 19:46:59,958 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2022-04-06 19:46:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:59,958 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-06 19:46:59,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-06 19:46:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:46:59,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:59,959 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:59,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 19:47:00,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:00,168 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1746706810, now seen corresponding path program 9 times [2022-04-06 19:47:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690555116] [2022-04-06 19:47:00,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:00,181 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:00,181 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1746706810, now seen corresponding path program 10 times [2022-04-06 19:47:00,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:00,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089639607] [2022-04-06 19:47:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:00,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:00,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:00,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:00,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089639607] [2022-04-06 19:47:00,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089639607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:00,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248371242] [2022-04-06 19:47:00,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:00,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:00,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:00,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:00,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:47:00,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:00,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:47:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:47:00,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:47:00,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248371242] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:00,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:00,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-04-06 19:47:00,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:00,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690555116] [2022-04-06 19:47:00,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690555116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:00,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:00,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:47:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100458108] [2022-04-06 19:47:00,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:00,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:47:00,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:47:00,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:47:00,496 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2022-04-06 19:47:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:00,614 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-06 19:47:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:47:00,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 [2022-04-06 19:47:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:00,614 INFO L225 Difference]: With dead ends: 34 [2022-04-06 19:47:00,615 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 19:47:00,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:47:00,616 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:00,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 46 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:47:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 19:47:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 19:47:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-04-06 19:47:00,620 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2022-04-06 19:47:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:00,621 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-04-06 19:47:00,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2022-04-06 19:47:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-04-06 19:47:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 19:47:00,621 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:00,622 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:00,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:00,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:00,832 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:00,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1165536611, now seen corresponding path program 11 times [2022-04-06 19:47:00,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:00,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59827954] [2022-04-06 19:47:00,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:00,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:00,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1165536611, now seen corresponding path program 12 times [2022-04-06 19:47:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:00,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383093215] [2022-04-06 19:47:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:00,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:00,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:00,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:00,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383093215] [2022-04-06 19:47:00,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383093215] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:00,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8000587] [2022-04-06 19:47:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:00,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:00,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:00,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:47:00,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:47:00,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:47:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 19:47:01,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 19:47:01,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8000587] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:01,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:01,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2022-04-06 19:47:01,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:01,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59827954] [2022-04-06 19:47:01,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59827954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:01,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:01,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:47:01,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082474527] [2022-04-06 19:47:01,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:01,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:47:01,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:47:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:47:01,100 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:01,253 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-06 19:47:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:47:01,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 19:47:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:01,255 INFO L225 Difference]: With dead ends: 36 [2022-04-06 19:47:01,255 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 19:47:01,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:47:01,256 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:01,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 19:47:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 19:47:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 19:47:01,264 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2022-04-06 19:47:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:01,264 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 19:47:01,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 19:47:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:47:01,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:01,265 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:01,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:01,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:01,476 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 329129626, now seen corresponding path program 13 times [2022-04-06 19:47:01,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:01,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424078451] [2022-04-06 19:47:01,495 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:01,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:01,498 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:01,499 INFO L85 PathProgramCache]: Analyzing trace with hash 329129626, now seen corresponding path program 14 times [2022-04-06 19:47:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:01,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296629368] [2022-04-06 19:47:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:01,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:01,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:01,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296629368] [2022-04-06 19:47:01,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296629368] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:01,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429641429] [2022-04-06 19:47:01,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:01,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:01,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:01,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:47:01,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:01,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:47:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 19:47:01,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 19:47:01,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429641429] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:01,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:01,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2022-04-06 19:47:01,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:01,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424078451] [2022-04-06 19:47:01,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424078451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:01,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:01,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:47:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476239148] [2022-04-06 19:47:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:01,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:47:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:47:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:47:01,852 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:02,021 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 19:47:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:47:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 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 21 [2022-04-06 19:47:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:02,023 INFO L225 Difference]: With dead ends: 38 [2022-04-06 19:47:02,023 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 19:47:02,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:47:02,025 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:02,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 19:47:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 19:47:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-04-06 19:47:02,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2022-04-06 19:47:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:02,033 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-04-06 19:47:02,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-06 19:47:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 19:47:02,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:02,034 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:02,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:02,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:02,257 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash 170316867, now seen corresponding path program 15 times [2022-04-06 19:47:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:02,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185727379] [2022-04-06 19:47:02,268 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:02,274 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:02,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:02,274 INFO L85 PathProgramCache]: Analyzing trace with hash 170316867, now seen corresponding path program 16 times [2022-04-06 19:47:02,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:02,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434145510] [2022-04-06 19:47:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:02,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:02,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434145510] [2022-04-06 19:47:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434145510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128787198] [2022-04-06 19:47:02,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:02,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:02,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:02,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:02,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:47:02,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:02,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:47:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 19:47:02,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 19:47:02,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128787198] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:02,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:02,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2022-04-06 19:47:02,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185727379] [2022-04-06 19:47:02,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185727379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:02,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:02,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:47:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176617103] [2022-04-06 19:47:02,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:02,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:47:02,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:47:02,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:47:02,692 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:02,888 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-04-06 19:47:02,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:47:02,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 19:47:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:02,889 INFO L225 Difference]: With dead ends: 40 [2022-04-06 19:47:02,889 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 19:47:02,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:47:02,890 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:02,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 61 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 19:47:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 19:47:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-04-06 19:47:02,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2022-04-06 19:47:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:02,895 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-04-06 19:47:02,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-04-06 19:47:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:47:02,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:02,896 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:02,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:03,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:47:03,118 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:03,119 INFO L85 PathProgramCache]: Analyzing trace with hash -457911366, now seen corresponding path program 17 times [2022-04-06 19:47:03,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:03,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1646820350] [2022-04-06 19:47:03,128 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:03,131 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:03,132 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -457911366, now seen corresponding path program 18 times [2022-04-06 19:47:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:03,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075841015] [2022-04-06 19:47:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:03,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:03,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:03,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075841015] [2022-04-06 19:47:03,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075841015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:03,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044403915] [2022-04-06 19:47:03,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:03,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:03,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:03,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:03,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:47:03,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:47:03,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:47:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:47:03,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:47:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044403915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:03,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:03,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-04-06 19:47:03,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1646820350] [2022-04-06 19:47:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1646820350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:03,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:03,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:47:03,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262096680] [2022-04-06 19:47:03,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:03,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:47:03,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:47:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:47:03,426 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:03,600 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-04-06 19:47:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:47:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 19:47:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:03,601 INFO L225 Difference]: With dead ends: 42 [2022-04-06 19:47:03,601 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 19:47:03,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:47:03,602 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:03,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 19:47:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 19:47:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-04-06 19:47:03,607 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2022-04-06 19:47:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:03,607 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-04-06 19:47:03,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-04-06 19:47:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 19:47:03,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:03,608 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:03,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:03,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:03,820 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1541849891, now seen corresponding path program 19 times [2022-04-06 19:47:03,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:03,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610036532] [2022-04-06 19:47:03,833 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:03,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:03,837 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1541849891, now seen corresponding path program 20 times [2022-04-06 19:47:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266374030] [2022-04-06 19:47:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 19:47:03,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266374030] [2022-04-06 19:47:03,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266374030] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160400865] [2022-04-06 19:47:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:03,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:03,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:03,888 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:03,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:47:03,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:03,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:47:03,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:47:03,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:47:04,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160400865] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:04,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:04,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-04-06 19:47:04,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610036532] [2022-04-06 19:47:04,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610036532] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:04,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:04,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:47:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981756352] [2022-04-06 19:47:04,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:04,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:47:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:47:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:47:04,068 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:04,116 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-04-06 19:47:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:47:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 19:47:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:04,117 INFO L225 Difference]: With dead ends: 55 [2022-04-06 19:47:04,117 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 19:47:04,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:47:04,118 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:04,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:47:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 19:47:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-04-06 19:47:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-04-06 19:47:04,126 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 24 [2022-04-06 19:47:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:04,126 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-04-06 19:47:04,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-04-06 19:47:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:47:04,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:04,127 INFO L499 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:04,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:04,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:47:04,340 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1949118775, now seen corresponding path program 21 times [2022-04-06 19:47:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:04,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1678357505] [2022-04-06 19:47:04,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:04,375 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:04,375 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:04,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1949118775, now seen corresponding path program 22 times [2022-04-06 19:47:04,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:04,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80395579] [2022-04-06 19:47:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:04,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:04,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:47:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:04,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80395579] [2022-04-06 19:47:04,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80395579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:04,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398225529] [2022-04-06 19:47:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:04,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:04,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:47:04,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:47:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:47:04,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 19:47:04,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398225529] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:04,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:04,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-04-06 19:47:04,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1678357505] [2022-04-06 19:47:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1678357505] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:04,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:04,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:47:04,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492795788] [2022-04-06 19:47:04,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:04,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:47:04,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:47:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:47:04,726 INFO L87 Difference]: Start difference. First operand 38 states and 40 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) [2022-04-06 19:47:04,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:04,785 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-04-06 19:47:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:47:04,786 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 37 [2022-04-06 19:47:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:04,786 INFO L225 Difference]: With dead ends: 68 [2022-04-06 19:47:04,786 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 19:47:04,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:47:04,787 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 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 [2022-04-06 19:47:04,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:47:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 19:47:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2022-04-06 19:47:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-04-06 19:47:04,798 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 37 [2022-04-06 19:47:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:04,798 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-04-06 19:47:04,798 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) [2022-04-06 19:47:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-04-06 19:47:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 19:47:04,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:04,799 INFO L499 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:04,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 19:47:05,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:47:05,012 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:05,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1730060061, now seen corresponding path program 23 times [2022-04-06 19:47:05,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:05,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [731887786] [2022-04-06 19:47:05,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:05,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:05,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1730060061, now seen corresponding path program 24 times [2022-04-06 19:47:05,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:05,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349508170] [2022-04-06 19:47:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 19:47:05,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349508170] [2022-04-06 19:47:05,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349508170] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347082295] [2022-04-06 19:47:05,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:05,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:05,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:05,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:05,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:47:05,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-04-06 19:47:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:05,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 19:47:05,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 19:47:05,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 28 proven. 378 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 19:47:05,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347082295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:05,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:05,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2022-04-06 19:47:05,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:05,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [731887786] [2022-04-06 19:47:05,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [731887786] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:05,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:05,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:47:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565082577] [2022-04-06 19:47:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:05,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:47:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:47:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:47:05,875 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:05,953 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-04-06 19:47:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:47:05,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 19:47:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:05,954 INFO L225 Difference]: With dead ends: 81 [2022-04-06 19:47:05,955 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 19:47:05,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:47:05,955 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:05,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 24 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:47:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 19:47:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2022-04-06 19:47:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-04-06 19:47:05,969 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 50 [2022-04-06 19:47:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:05,969 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-04-06 19:47:05,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-04-06 19:47:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 19:47:05,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:05,970 INFO L499 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:05,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:06,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:47:06,180 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash 538347785, now seen corresponding path program 25 times [2022-04-06 19:47:06,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:06,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358855697] [2022-04-06 19:47:06,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:06,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:06,212 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash 538347785, now seen corresponding path program 26 times [2022-04-06 19:47:06,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:06,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099817746] [2022-04-06 19:47:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:06,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:06,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 19:47:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099817746] [2022-04-06 19:47:06,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099817746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102010449] [2022-04-06 19:47:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:06,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:06,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:06,304 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:06,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:47:06,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:06,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:47:06,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 19:47:06,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 19:47:06,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102010449] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:06,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:06,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 13 [2022-04-06 19:47:06,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358855697] [2022-04-06 19:47:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358855697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:06,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:47:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472750135] [2022-04-06 19:47:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:06,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:47:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:47:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:47:06,768 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:06,881 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-04-06 19:47:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:47:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 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 63 [2022-04-06 19:47:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:06,882 INFO L225 Difference]: With dead ends: 94 [2022-04-06 19:47:06,882 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 19:47:06,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:47:06,883 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:06,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 19:47:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2022-04-06 19:47:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-04-06 19:47:06,898 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 63 [2022-04-06 19:47:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:06,898 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-04-06 19:47:06,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-04-06 19:47:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 19:47:06,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:06,899 INFO L499 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:06,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:07,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:47:07,123 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash -445755741, now seen corresponding path program 27 times [2022-04-06 19:47:07,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:07,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409471583] [2022-04-06 19:47:07,148 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:07,150 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:07,150 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash -445755741, now seen corresponding path program 28 times [2022-04-06 19:47:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:07,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758950342] [2022-04-06 19:47:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:07,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:07,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-04-06 19:47:07,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:07,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758950342] [2022-04-06 19:47:07,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758950342] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345480129] [2022-04-06 19:47:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:07,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:07,264 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:07,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:47:07,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:07,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:07,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:47:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-04-06 19:47:07,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-04-06 19:47:07,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345480129] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:07,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:07,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 19:47:07,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:07,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409471583] [2022-04-06 19:47:07,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409471583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:07,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:07,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:47:07,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431413247] [2022-04-06 19:47:07,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:07,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:47:07,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:47:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:47:07,924 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2022-04-06 19:47:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:08,076 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-04-06 19:47:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:47:08,077 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 76 [2022-04-06 19:47:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:08,077 INFO L225 Difference]: With dead ends: 107 [2022-04-06 19:47:08,077 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 19:47:08,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:47:08,078 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:08,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 43 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 19:47:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2022-04-06 19:47:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-04-06 19:47:08,096 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 76 [2022-04-06 19:47:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:08,097 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-04-06 19:47:08,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2022-04-06 19:47:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-04-06 19:47:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:47:08,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:08,098 INFO L499 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:08,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:08,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:08,311 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1359606601, now seen corresponding path program 29 times [2022-04-06 19:47:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:08,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329251826] [2022-04-06 19:47:08,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:08,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:08,342 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1359606601, now seen corresponding path program 30 times [2022-04-06 19:47:08,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:08,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710137827] [2022-04-06 19:47:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:08,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-04-06 19:47:08,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:08,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710137827] [2022-04-06 19:47:08,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710137827] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:08,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785150944] [2022-04-06 19:47:08,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:08,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:08,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:08,483 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:08,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:47:09,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-04-06 19:47:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:09,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:47:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-04-06 19:47:10,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2022-04-06 19:47:10,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785150944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:10,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:10,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 6] total 15 [2022-04-06 19:47:10,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:10,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329251826] [2022-04-06 19:47:10,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329251826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:10,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:10,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:47:10,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885597665] [2022-04-06 19:47:10,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:10,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:47:10,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:47:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:47:10,575 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2022-04-06 19:47:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:10,764 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-04-06 19:47:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:47:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 89 [2022-04-06 19:47:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:10,766 INFO L225 Difference]: With dead ends: 120 [2022-04-06 19:47:10,766 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 19:47:10,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:47:10,767 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:10,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 50 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 19:47:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-04-06 19:47:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 98 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2022-04-06 19:47:10,784 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 89 [2022-04-06 19:47:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:10,784 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2022-04-06 19:47:10,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2022-04-06 19:47:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2022-04-06 19:47:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:47:10,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:10,785 INFO L499 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:10,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:10,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:47:10,991 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1682541667, now seen corresponding path program 31 times [2022-04-06 19:47:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1931991383] [2022-04-06 19:47:11,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:11,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:11,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1682541667, now seen corresponding path program 32 times [2022-04-06 19:47:11,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:11,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586472909] [2022-04-06 19:47:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:11,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:11,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-04-06 19:47:11,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:11,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586472909] [2022-04-06 19:47:11,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586472909] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:11,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280407399] [2022-04-06 19:47:11,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:11,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:11,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:11,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:11,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:47:11,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:11,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:11,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:47:11,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-04-06 19:47:11,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-04-06 19:47:11,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280407399] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:11,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:11,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 19:47:11,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:11,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1931991383] [2022-04-06 19:47:11,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1931991383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:11,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:11,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:47:11,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10831420] [2022-04-06 19:47:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:11,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:47:11,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:47:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:47:11,884 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:12,109 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-04-06 19:47:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:47:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:47:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:12,110 INFO L225 Difference]: With dead ends: 133 [2022-04-06 19:47:12,110 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 19:47:12,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:47:12,111 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:12,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 57 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 19:47:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-04-06 19:47:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.0810810810810811) internal successors, (120), 111 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2022-04-06 19:47:12,134 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 102 [2022-04-06 19:47:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:12,134 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2022-04-06 19:47:12,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2022-04-06 19:47:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 19:47:12,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:12,135 INFO L499 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:12,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:12,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 19:47:12,337 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1299254665, now seen corresponding path program 33 times [2022-04-06 19:47:12,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1461737167] [2022-04-06 19:47:12,362 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:12,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:12,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1299254665, now seen corresponding path program 34 times [2022-04-06 19:47:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:12,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624015994] [2022-04-06 19:47:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:12,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-04-06 19:47:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:12,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624015994] [2022-04-06 19:47:12,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624015994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:12,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070732214] [2022-04-06 19:47:12,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:12,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:12,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:12,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:47:12,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:12,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:47:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-04-06 19:47:12,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 1972 refuted. 0 times theorem prover too weak. 1920 trivial. 0 not checked. [2022-04-06 19:47:13,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070732214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:13,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:13,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 6] total 17 [2022-04-06 19:47:13,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1461737167] [2022-04-06 19:47:13,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1461737167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:13,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:13,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:47:13,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454486397] [2022-04-06 19:47:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:13,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:47:13,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:47:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:47:13,218 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:13,447 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2022-04-06 19:47:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:47:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 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 115 [2022-04-06 19:47:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:13,448 INFO L225 Difference]: With dead ends: 146 [2022-04-06 19:47:13,448 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 19:47:13,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:47:13,449 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:13,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 64 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 19:47:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2022-04-06 19:47:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 124 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-04-06 19:47:13,472 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 115 [2022-04-06 19:47:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:13,472 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-04-06 19:47:13,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-04-06 19:47:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 19:47:13,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:13,473 INFO L499 BasicCegarLoop]: trace histogram [90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:13,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:13,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:13,674 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash 86972963, now seen corresponding path program 35 times [2022-04-06 19:47:13,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390819515] [2022-04-06 19:47:13,701 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:13,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:13,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 86972963, now seen corresponding path program 36 times [2022-04-06 19:47:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:13,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977098058] [2022-04-06 19:47:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 19:47:13,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:13,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977098058] [2022-04-06 19:47:13,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977098058] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:13,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920012037] [2022-04-06 19:47:13,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:13,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:13,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:13,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:13,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:47:16,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 19:47:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 19:47:16,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 19:47:17,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 19:47:17,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920012037] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:17,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:17,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 27 [2022-04-06 19:47:17,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:17,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390819515] [2022-04-06 19:47:17,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390819515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:17,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:17,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:47:17,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794941485] [2022-04-06 19:47:17,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:17,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:47:17,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:47:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:47:17,888 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:18,158 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2022-04-06 19:47:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:47:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-04-06 19:47:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:18,159 INFO L225 Difference]: With dead ends: 159 [2022-04-06 19:47:18,159 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 19:47:18,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:47:18,160 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 69 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:18,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 36 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 19:47:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2022-04-06 19:47:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2022-04-06 19:47:18,187 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 128 [2022-04-06 19:47:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:18,187 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2022-04-06 19:47:18,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2022-04-06 19:47:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 19:47:18,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:18,189 INFO L499 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:18,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:18,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:18,395 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1760569399, now seen corresponding path program 37 times [2022-04-06 19:47:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994954428] [2022-04-06 19:47:18,427 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:18,431 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:18,431 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:18,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1760569399, now seen corresponding path program 38 times [2022-04-06 19:47:18,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:18,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842461979] [2022-04-06 19:47:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:18,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:18,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-04-06 19:47:18,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:18,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842461979] [2022-04-06 19:47:18,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842461979] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:18,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304421752] [2022-04-06 19:47:18,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:18,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:18,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:18,656 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:18,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:47:18,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:18,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:47:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-04-06 19:47:19,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-04-06 19:47:19,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304421752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:19,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 6] total 19 [2022-04-06 19:47:19,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994954428] [2022-04-06 19:47:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994954428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:19,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:47:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765962213] [2022-04-06 19:47:19,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:19,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:47:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:47:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:47:19,548 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:19,893 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2022-04-06 19:47:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:47:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-04-06 19:47:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:19,895 INFO L225 Difference]: With dead ends: 172 [2022-04-06 19:47:19,895 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 19:47:19,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 278 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:47:19,896 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:19,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 63 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:47:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 19:47:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-04-06 19:47:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.08) internal successors, (162), 150 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2022-04-06 19:47:19,925 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 141 [2022-04-06 19:47:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:19,925 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2022-04-06 19:47:19,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2022-04-06 19:47:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 19:47:19,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:19,927 INFO L499 BasicCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:19,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:20,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:20,147 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1155200995, now seen corresponding path program 39 times [2022-04-06 19:47:20,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:20,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [260424680] [2022-04-06 19:47:20,171 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:20,173 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:20,173 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1155200995, now seen corresponding path program 40 times [2022-04-06 19:47:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:20,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423186423] [2022-04-06 19:47:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2022-04-06 19:47:20,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423186423] [2022-04-06 19:47:20,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423186423] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32190060] [2022-04-06 19:47:20,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:20,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:20,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:20,424 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:20,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:47:20,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:20,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:47:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2022-04-06 19:47:20,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2022-04-06 19:47:21,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32190060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:21,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:21,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 19:47:21,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:21,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [260424680] [2022-04-06 19:47:21,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [260424680] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:21,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:21,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:47:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591911985] [2022-04-06 19:47:21,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:21,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:47:21,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:47:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:47:21,480 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:21,823 INFO L93 Difference]: Finished difference Result 185 states and 198 transitions. [2022-04-06 19:47:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:47:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 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 154 [2022-04-06 19:47:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:21,825 INFO L225 Difference]: With dead ends: 185 [2022-04-06 19:47:21,825 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 19:47:21,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:47:21,826 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:21,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 60 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:47:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 19:47:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 168. [2022-04-06 19:47:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 163 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 180 transitions. [2022-04-06 19:47:21,856 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 180 transitions. Word has length 154 [2022-04-06 19:47:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:21,856 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 180 transitions. [2022-04-06 19:47:21,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:21,856 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 180 transitions. [2022-04-06 19:47:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 19:47:21,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:21,857 INFO L499 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:21,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:22,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 19:47:22,064 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1118458377, now seen corresponding path program 41 times [2022-04-06 19:47:22,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:22,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410383717] [2022-04-06 19:47:22,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:22,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:22,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1118458377, now seen corresponding path program 42 times [2022-04-06 19:47:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:22,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481266976] [2022-04-06 19:47:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:22,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:22,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-04-06 19:47:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481266976] [2022-04-06 19:47:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481266976] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197437330] [2022-04-06 19:47:22,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:22,364 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:22,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:47:28,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-04-06 19:47:28,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:28,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 19:47:28,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-04-06 19:47:28,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-04-06 19:47:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197437330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:30,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:30,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 19] total 34 [2022-04-06 19:47:30,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410383717] [2022-04-06 19:47:30,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410383717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:30,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:30,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:47:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77032706] [2022-04-06 19:47:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:30,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:47:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:47:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:47:30,843 INFO L87 Difference]: Start difference. First operand 168 states and 180 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:31,283 INFO L93 Difference]: Finished difference Result 198 states and 212 transitions. [2022-04-06 19:47:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:47:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 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 167 [2022-04-06 19:47:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:31,284 INFO L225 Difference]: With dead ends: 198 [2022-04-06 19:47:31,284 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 19:47:31,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:47:31,285 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 87 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:31,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 82 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:47:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 19:47:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 181. [2022-04-06 19:47:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0795454545454546) internal successors, (190), 176 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 194 transitions. [2022-04-06 19:47:31,312 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 194 transitions. Word has length 167 [2022-04-06 19:47:31,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:31,312 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 194 transitions. [2022-04-06 19:47:31,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 194 transitions. [2022-04-06 19:47:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-04-06 19:47:31,314 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:31,314 INFO L499 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:31,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:31,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 19:47:31,517 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash -318167645, now seen corresponding path program 43 times [2022-04-06 19:47:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:31,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1168861263] [2022-04-06 19:47:31,548 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:31,552 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:31,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:31,553 INFO L85 PathProgramCache]: Analyzing trace with hash -318167645, now seen corresponding path program 44 times [2022-04-06 19:47:31,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:31,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899527443] [2022-04-06 19:47:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:31,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:31,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-04-06 19:47:31,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899527443] [2022-04-06 19:47:31,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899527443] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755516106] [2022-04-06 19:47:31,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:31,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:31,876 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:31,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:47:32,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:32,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:32,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:47:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-04-06 19:47:32,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-04-06 19:47:33,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755516106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:33,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:33,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 19:47:33,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:33,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1168861263] [2022-04-06 19:47:33,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1168861263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:33,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:33,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:47:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900928278] [2022-04-06 19:47:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:33,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:47:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:47:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:47:33,254 INFO L87 Difference]: Start difference. First operand 181 states and 194 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:33,664 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-04-06 19:47:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:47:33,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-04-06 19:47:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:33,667 INFO L225 Difference]: With dead ends: 211 [2022-04-06 19:47:33,667 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 19:47:33,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:47:33,668 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:33,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 59 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:47:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 19:47:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 194. [2022-04-06 19:47:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0793650793650793) internal successors, (204), 189 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 208 transitions. [2022-04-06 19:47:33,706 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 208 transitions. Word has length 180 [2022-04-06 19:47:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:33,706 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 208 transitions. [2022-04-06 19:47:33,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 208 transitions. [2022-04-06 19:47:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 19:47:33,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:33,708 INFO L499 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:33,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 19:47:33,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:33,928 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 939818057, now seen corresponding path program 45 times [2022-04-06 19:47:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603516394] [2022-04-06 19:47:33,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:33,954 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:33,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash 939818057, now seen corresponding path program 46 times [2022-04-06 19:47:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:33,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648640018] [2022-04-06 19:47:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:33,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:34,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-04-06 19:47:34,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648640018] [2022-04-06 19:47:34,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648640018] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906587351] [2022-04-06 19:47:34,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:34,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:34,272 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:34,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:47:34,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:34,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 19:47:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-04-06 19:47:35,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 6034 refuted. 0 times theorem prover too weak. 5943 trivial. 0 not checked. [2022-04-06 19:47:35,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906587351] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:35,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:35,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 6] total 23 [2022-04-06 19:47:35,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:35,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603516394] [2022-04-06 19:47:35,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603516394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:35,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:35,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:47:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659356893] [2022-04-06 19:47:35,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:35,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:47:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:47:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:47:35,444 INFO L87 Difference]: Start difference. First operand 194 states and 208 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:35,917 INFO L93 Difference]: Finished difference Result 224 states and 240 transitions. [2022-04-06 19:47:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:47:35,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 2 states have call successors, (3), 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 193 [2022-04-06 19:47:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:35,918 INFO L225 Difference]: With dead ends: 224 [2022-04-06 19:47:35,918 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 19:47:35,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 382 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:47:35,919 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:35,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 56 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:47:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 19:47:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 207. [2022-04-06 19:47:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0792079207920793) internal successors, (218), 202 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 222 transitions. [2022-04-06 19:47:35,961 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 222 transitions. Word has length 193 [2022-04-06 19:47:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:35,961 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 222 transitions. [2022-04-06 19:47:35,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 222 transitions. [2022-04-06 19:47:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 19:47:35,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:35,967 INFO L499 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:35,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:36,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:36,167 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -730487965, now seen corresponding path program 47 times [2022-04-06 19:47:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835894874] [2022-04-06 19:47:36,193 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:36,195 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:36,195 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash -730487965, now seen corresponding path program 48 times [2022-04-06 19:47:36,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:36,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852871431] [2022-04-06 19:47:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:36,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:36,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2022-04-06 19:47:36,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:36,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852871431] [2022-04-06 19:47:36,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852871431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:36,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212569289] [2022-04-06 19:47:36,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:36,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:36,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:36,519 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:36,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:47:43,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2022-04-06 19:47:43,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 19:47:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2022-04-06 19:47:44,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2022-04-06 19:47:45,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212569289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:45,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:45,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 39 [2022-04-06 19:47:45,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:45,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835894874] [2022-04-06 19:47:45,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835894874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:45,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:45,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:47:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258084819] [2022-04-06 19:47:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:45,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:47:45,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:47:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:47:45,915 INFO L87 Difference]: Start difference. First operand 207 states and 222 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:46,551 INFO L93 Difference]: Finished difference Result 237 states and 254 transitions. [2022-04-06 19:47:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:47:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (3), 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 206 [2022-04-06 19:47:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:46,552 INFO L225 Difference]: With dead ends: 237 [2022-04-06 19:47:46,552 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 19:47:46,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=737, Invalid=2233, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:47:46,554 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:46,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 53 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:47:46,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 19:47:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 220. [2022-04-06 19:47:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0790697674418606) internal successors, (232), 215 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 236 transitions. [2022-04-06 19:47:46,612 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 236 transitions. Word has length 206 [2022-04-06 19:47:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:46,612 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 236 transitions. [2022-04-06 19:47:46,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 236 transitions. [2022-04-06 19:47:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 19:47:46,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:46,618 INFO L499 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:46,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:46,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:47:46,827 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1910658697, now seen corresponding path program 49 times [2022-04-06 19:47:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:46,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406174960] [2022-04-06 19:47:46,855 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:46,856 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:46,856 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1910658697, now seen corresponding path program 50 times [2022-04-06 19:47:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733099804] [2022-04-06 19:47:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:47,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2022-04-06 19:47:47,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733099804] [2022-04-06 19:47:47,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733099804] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681581914] [2022-04-06 19:47:47,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:47,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:47,211 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:47,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:47:47,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:47,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:47,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 19:47:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2022-04-06 19:47:48,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 7880 refuted. 0 times theorem prover too weak. 7776 trivial. 0 not checked. [2022-04-06 19:47:48,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681581914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:48,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:48,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 6] total 25 [2022-04-06 19:47:48,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406174960] [2022-04-06 19:47:48,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406174960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:48,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:48,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:47:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274061128] [2022-04-06 19:47:48,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:48,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:47:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:47:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:47:48,449 INFO L87 Difference]: Start difference. First operand 220 states and 236 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:49,114 INFO L93 Difference]: Finished difference Result 250 states and 268 transitions. [2022-04-06 19:47:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:47:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-04-06 19:47:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:49,116 INFO L225 Difference]: With dead ends: 250 [2022-04-06 19:47:49,117 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 19:47:49,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 434 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:47:49,118 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:49,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 70 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:47:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 19:47:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2022-04-06 19:47:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0789473684210527) internal successors, (246), 228 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 250 transitions. [2022-04-06 19:47:49,172 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 250 transitions. Word has length 219 [2022-04-06 19:47:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:49,172 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 250 transitions. [2022-04-06 19:47:49,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 250 transitions. [2022-04-06 19:47:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-06 19:47:49,174 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:49,174 INFO L499 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:49,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 19:47:49,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 19:47:49,396 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:49,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1629720285, now seen corresponding path program 51 times [2022-04-06 19:47:49,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:49,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [527235740] [2022-04-06 19:47:49,420 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:49,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:49,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1629720285, now seen corresponding path program 52 times [2022-04-06 19:47:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:49,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779807560] [2022-04-06 19:47:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:49,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-04-06 19:47:49,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:49,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779807560] [2022-04-06 19:47:49,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779807560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:49,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338258742] [2022-04-06 19:47:49,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:49,793 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:49,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:47:49,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:49,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:49,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 19:47:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-04-06 19:47:50,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-04-06 19:47:51,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338258742] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:51,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:51,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 19:47:51,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:51,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [527235740] [2022-04-06 19:47:51,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [527235740] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:51,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:51,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:47:51,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964046774] [2022-04-06 19:47:51,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:51,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:47:51,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:51,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:47:51,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:47:51,555 INFO L87 Difference]: Start difference. First operand 233 states and 250 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:52,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:52,253 INFO L93 Difference]: Finished difference Result 263 states and 282 transitions. [2022-04-06 19:47:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:47:52,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 2 states have call successors, (3), 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 232 [2022-04-06 19:47:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:52,254 INFO L225 Difference]: With dead ends: 263 [2022-04-06 19:47:52,255 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 19:47:52,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=867, Invalid=2439, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:47:52,256 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 117 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:52,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 107 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:47:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 19:47:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 246. [2022-04-06 19:47:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.0788381742738589) internal successors, (260), 241 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 264 transitions. [2022-04-06 19:47:52,312 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 264 transitions. Word has length 232 [2022-04-06 19:47:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:52,313 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 264 transitions. [2022-04-06 19:47:52,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 264 transitions. [2022-04-06 19:47:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 19:47:52,314 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:52,315 INFO L499 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:52,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:52,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:47:52,538 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1040703689, now seen corresponding path program 53 times [2022-04-06 19:47:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:52,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [882860133] [2022-04-06 19:47:52,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:52,567 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:52,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1040703689, now seen corresponding path program 54 times [2022-04-06 19:47:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:52,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999216954] [2022-04-06 19:47:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:52,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 19:47:52,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999216954] [2022-04-06 19:47:52,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999216954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061760418] [2022-04-06 19:47:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:52,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:52,984 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:53,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:48:02,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2022-04-06 19:48:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 19:48:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 19:48:03,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 19:48:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061760418] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:04,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:04,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 24] total 45 [2022-04-06 19:48:04,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [882860133] [2022-04-06 19:48:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [882860133] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:04,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:04,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:48:04,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219915007] [2022-04-06 19:48:04,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:04,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:48:04,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:48:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:48:04,834 INFO L87 Difference]: Start difference. First operand 246 states and 264 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:05,611 INFO L93 Difference]: Finished difference Result 276 states and 296 transitions. [2022-04-06 19:48:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:48:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (3), 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 245 [2022-04-06 19:48:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:05,613 INFO L225 Difference]: With dead ends: 276 [2022-04-06 19:48:05,613 INFO L226 Difference]: Without dead ends: 271 [2022-04-06 19:48:05,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 469 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=988, Invalid=3044, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:48:05,615 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 123 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:05,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 119 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-04-06 19:48:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 259. [2022-04-06 19:48:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.078740157480315) internal successors, (274), 254 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 278 transitions. [2022-04-06 19:48:05,667 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 278 transitions. Word has length 245 [2022-04-06 19:48:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:05,667 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 278 transitions. [2022-04-06 19:48:05,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 278 transitions. [2022-04-06 19:48:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-04-06 19:48:05,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:05,668 INFO L499 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:05,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 19:48:05,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:48:05,869 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2096729827, now seen corresponding path program 55 times [2022-04-06 19:48:05,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:05,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765706127] [2022-04-06 19:48:05,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:05,908 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:05,908 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2096729827, now seen corresponding path program 56 times [2022-04-06 19:48:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:05,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844937492] [2022-04-06 19:48:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:05,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:06,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-04-06 19:48:06,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:06,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844937492] [2022-04-06 19:48:06,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844937492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303571662] [2022-04-06 19:48:06,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:06,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:06,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:06,368 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:06,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:48:06,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:06,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:06,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:48:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-04-06 19:48:07,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-04-06 19:48:08,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303571662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:08,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:08,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 19:48:08,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765706127] [2022-04-06 19:48:08,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765706127] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:08,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:08,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:48:08,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582294250] [2022-04-06 19:48:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:08,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:48:08,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:48:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1367, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:48:08,562 INFO L87 Difference]: Start difference. First operand 259 states and 278 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:09,431 INFO L93 Difference]: Finished difference Result 289 states and 310 transitions. [2022-04-06 19:48:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:48:09,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 2 states have call successors, (3), 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 258 [2022-04-06 19:48:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:09,433 INFO L225 Difference]: With dead ends: 289 [2022-04-06 19:48:09,433 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 19:48:09,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 497 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=2989, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:48:09,435 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 129 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:09,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 66 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 19:48:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 272. [2022-04-06 19:48:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.0786516853932584) internal successors, (288), 267 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 292 transitions. [2022-04-06 19:48:09,506 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 292 transitions. Word has length 258 [2022-04-06 19:48:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:09,506 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 292 transitions. [2022-04-06 19:48:09,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 292 transitions. [2022-04-06 19:48:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-04-06 19:48:09,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:09,508 INFO L499 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:09,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:09,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:09,722 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:09,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2100894473, now seen corresponding path program 57 times [2022-04-06 19:48:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:09,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293726037] [2022-04-06 19:48:09,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:09,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:09,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2100894473, now seen corresponding path program 58 times [2022-04-06 19:48:09,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:09,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334208461] [2022-04-06 19:48:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:10,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2022-04-06 19:48:10,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334208461] [2022-04-06 19:48:10,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334208461] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673424845] [2022-04-06 19:48:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:10,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:10,226 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:10,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:48:10,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:10,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:10,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 19:48:10,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2022-04-06 19:48:11,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 12310 refuted. 0 times theorem prover too weak. 12180 trivial. 0 not checked. [2022-04-06 19:48:11,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673424845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:11,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:11,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 6] total 29 [2022-04-06 19:48:11,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1293726037] [2022-04-06 19:48:11,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1293726037] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:11,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:11,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:48:11,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735039185] [2022-04-06 19:48:11,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:11,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:48:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:48:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:48:11,638 INFO L87 Difference]: Start difference. First operand 272 states and 292 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:12,514 INFO L93 Difference]: Finished difference Result 302 states and 324 transitions. [2022-04-06 19:48:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:48:12,515 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 2 states have call successors, (3), 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 271 [2022-04-06 19:48:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:12,516 INFO L225 Difference]: With dead ends: 302 [2022-04-06 19:48:12,517 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 19:48:12,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 538 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=2209, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:48:12,518 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:12,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 118 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 19:48:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 285. [2022-04-06 19:48:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0785714285714285) internal successors, (302), 280 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2022-04-06 19:48:12,592 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 271 [2022-04-06 19:48:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:12,592 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2022-04-06 19:48:12,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2022-04-06 19:48:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-04-06 19:48:12,593 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:12,593 INFO L499 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:12,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 19:48:12,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:12,794 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash -326566749, now seen corresponding path program 59 times [2022-04-06 19:48:12,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:12,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807915447] [2022-04-06 19:48:12,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:12,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:12,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash -326566749, now seen corresponding path program 60 times [2022-04-06 19:48:12,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:12,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505763514] [2022-04-06 19:48:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:13,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2022-04-06 19:48:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505763514] [2022-04-06 19:48:13,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505763514] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838568634] [2022-04-06 19:48:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:13,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:13,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:13,340 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:13,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:48:32,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2022-04-06 19:48:32,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 19:48:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2022-04-06 19:48:33,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2022-04-06 19:48:35,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838568634] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:35,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:35,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 27] total 51 [2022-04-06 19:48:35,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807915447] [2022-04-06 19:48:35,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807915447] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:35,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:35,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:48:35,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497873489] [2022-04-06 19:48:35,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:35,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:48:35,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:48:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1901, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:48:35,692 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:36,634 INFO L93 Difference]: Finished difference Result 315 states and 338 transitions. [2022-04-06 19:48:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:48:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 2 states have call successors, (3), 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 284 [2022-04-06 19:48:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:36,636 INFO L225 Difference]: With dead ends: 315 [2022-04-06 19:48:36,636 INFO L226 Difference]: Without dead ends: 310 [2022-04-06 19:48:36,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 544 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1274, Invalid=3982, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 19:48:36,638 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 141 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:36,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 115 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:48:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-04-06 19:48:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 298. [2022-04-06 19:48:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0784982935153584) internal successors, (316), 293 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 320 transitions. [2022-04-06 19:48:36,727 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 320 transitions. Word has length 284 [2022-04-06 19:48:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:36,727 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 320 transitions. [2022-04-06 19:48:36,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 320 transitions. [2022-04-06 19:48:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-04-06 19:48:36,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:36,729 INFO L499 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:36,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:36,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 19:48:36,940 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash -482736823, now seen corresponding path program 61 times [2022-04-06 19:48:36,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:36,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [937020380] [2022-04-06 19:48:36,966 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:36,968 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:36,968 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash -482736823, now seen corresponding path program 62 times [2022-04-06 19:48:36,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:36,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899185361] [2022-04-06 19:48:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:37,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2022-04-06 19:48:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:37,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899185361] [2022-04-06 19:48:37,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899185361] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:37,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042917453] [2022-04-06 19:48:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:37,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:37,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:37,458 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:37,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:48:37,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 19:48:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2022-04-06 19:48:38,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 14894 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2022-04-06 19:48:39,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042917453] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:39,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:39,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 6] total 31 [2022-04-06 19:48:39,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [937020380] [2022-04-06 19:48:39,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [937020380] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:39,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:39,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:48:39,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050842463] [2022-04-06 19:48:39,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:39,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:48:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:48:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:48:39,032 INFO L87 Difference]: Start difference. First operand 298 states and 320 transitions. Second operand has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:40,043 INFO L93 Difference]: Finished difference Result 328 states and 352 transitions. [2022-04-06 19:48:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 19:48:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 2 states have call successors, (3), 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 297 [2022-04-06 19:48:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:40,045 INFO L225 Difference]: With dead ends: 328 [2022-04-06 19:48:40,045 INFO L226 Difference]: Without dead ends: 323 [2022-04-06 19:48:40,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 590 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=2599, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:48:40,046 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:40,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 127 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:48:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-04-06 19:48:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 311. [2022-04-06 19:48:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0784313725490196) internal successors, (330), 306 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 334 transitions. [2022-04-06 19:48:40,127 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 334 transitions. Word has length 297 [2022-04-06 19:48:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:40,127 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 334 transitions. [2022-04-06 19:48:40,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 334 transitions. [2022-04-06 19:48:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-04-06 19:48:40,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:40,129 INFO L499 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:40,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 19:48:40,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:40,353 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2017901155, now seen corresponding path program 63 times [2022-04-06 19:48:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:40,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1736941029] [2022-04-06 19:48:40,379 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:40,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:40,380 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2017901155, now seen corresponding path program 64 times [2022-04-06 19:48:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:40,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250944389] [2022-04-06 19:48:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:40,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-04-06 19:48:40,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250944389] [2022-04-06 19:48:40,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250944389] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108953744] [2022-04-06 19:48:40,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:40,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:40,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:40,888 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:40,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:48:41,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:41,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:41,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 19:48:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-04-06 19:48:41,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-04-06 19:48:43,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108953744] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:43,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:43,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 19:48:43,259 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1736941029] [2022-04-06 19:48:43,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1736941029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:43,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:43,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:48:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330323077] [2022-04-06 19:48:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:43,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:48:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:48:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:48:43,261 INFO L87 Difference]: Start difference. First operand 311 states and 334 transitions. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:44,359 INFO L93 Difference]: Finished difference Result 341 states and 366 transitions. [2022-04-06 19:48:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:48:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (3), 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 310 [2022-04-06 19:48:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:44,361 INFO L225 Difference]: With dead ends: 341 [2022-04-06 19:48:44,361 INFO L226 Difference]: Without dead ends: 336 [2022-04-06 19:48:44,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 597 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1443, Invalid=4257, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:48:44,362 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 153 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:44,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 169 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:48:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-04-06 19:48:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 324. [2022-04-06 19:48:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.078369905956113) internal successors, (344), 319 states have internal predecessors, (344), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 348 transitions. [2022-04-06 19:48:44,460 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 348 transitions. Word has length 310 [2022-04-06 19:48:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:44,461 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 348 transitions. [2022-04-06 19:48:44,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 348 transitions. [2022-04-06 19:48:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-04-06 19:48:44,462 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:44,462 INFO L499 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:44,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:44,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:44,675 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:44,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash 919510921, now seen corresponding path program 65 times [2022-04-06 19:48:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [170424079] [2022-04-06 19:48:44,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:44,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:44,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 919510921, now seen corresponding path program 66 times [2022-04-06 19:48:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861748211] [2022-04-06 19:48:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:45,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2022-04-06 19:48:45,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861748211] [2022-04-06 19:48:45,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861748211] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644052279] [2022-04-06 19:48:45,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:45,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:45,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:45,243 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:45,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:49:08,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 107 check-sat command(s) [2022-04-06 19:49:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:08,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 19:49:08,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2022-04-06 19:49:09,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2022-04-06 19:49:12,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644052279] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:12,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:12,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 30] total 57 [2022-04-06 19:49:12,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:12,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [170424079] [2022-04-06 19:49:12,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [170424079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:12,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:12,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 19:49:12,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939677098] [2022-04-06 19:49:12,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:12,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 19:49:12,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:12,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 19:49:12,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2380, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:49:12,138 INFO L87 Difference]: Start difference. First operand 324 states and 348 transitions. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:13,284 INFO L93 Difference]: Finished difference Result 354 states and 380 transitions. [2022-04-06 19:49:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 19:49:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 2 states have call successors, (3), 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 323 [2022-04-06 19:49:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:13,285 INFO L225 Difference]: With dead ends: 354 [2022-04-06 19:49:13,285 INFO L226 Difference]: Without dead ends: 349 [2022-04-06 19:49:13,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 619 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1597, Invalid=5045, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:49:13,286 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 159 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:13,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 76 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:49:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-04-06 19:49:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 337. [2022-04-06 19:49:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0783132530120483) internal successors, (358), 332 states have internal predecessors, (358), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 362 transitions. [2022-04-06 19:49:13,373 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 362 transitions. Word has length 323 [2022-04-06 19:49:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:13,373 INFO L478 AbstractCegarLoop]: Abstraction has 337 states and 362 transitions. [2022-04-06 19:49:13,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 362 transitions. [2022-04-06 19:49:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-04-06 19:49:13,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:13,375 INFO L499 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:13,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:13,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 19:49:13,584 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2012137507, now seen corresponding path program 67 times [2022-04-06 19:49:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:13,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849572804] [2022-04-06 19:49:13,627 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:13,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:13,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2012137507, now seen corresponding path program 68 times [2022-04-06 19:49:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:13,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322207115] [2022-04-06 19:49:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:13,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:14,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2022-04-06 19:49:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:14,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322207115] [2022-04-06 19:49:14,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322207115] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:14,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301414797] [2022-04-06 19:49:14,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:49:14,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:14,213 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:14,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:49:14,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:49:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:49:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2022-04-06 19:49:15,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2022-04-06 19:49:16,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301414797] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:16,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:16,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 19:49:16,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849572804] [2022-04-06 19:49:16,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849572804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:16,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:16,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:49:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686784703] [2022-04-06 19:49:16,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:16,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:49:16,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:49:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=2243, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:49:16,955 INFO L87 Difference]: Start difference. First operand 337 states and 362 transitions. Second operand has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:18,202 INFO L93 Difference]: Finished difference Result 367 states and 394 transitions. [2022-04-06 19:49:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:49:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 2 states have call successors, (3), 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 336 [2022-04-06 19:49:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:18,203 INFO L225 Difference]: With dead ends: 367 [2022-04-06 19:49:18,203 INFO L226 Difference]: Without dead ends: 362 [2022-04-06 19:49:18,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 647 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1667, Invalid=4975, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:49:18,204 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 165 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:18,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 133 Invalid, 2603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2550 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:49:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-06 19:49:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 350. [2022-04-06 19:49:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.0782608695652174) internal successors, (372), 345 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 376 transitions. [2022-04-06 19:49:18,285 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 376 transitions. Word has length 336 [2022-04-06 19:49:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:18,285 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 376 transitions. [2022-04-06 19:49:18,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 376 transitions. [2022-04-06 19:49:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-04-06 19:49:18,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:18,288 INFO L499 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:18,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:18,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 19:49:18,511 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1850021431, now seen corresponding path program 69 times [2022-04-06 19:49:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:18,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [87761878] [2022-04-06 19:49:18,539 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:18,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:18,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1850021431, now seen corresponding path program 70 times [2022-04-06 19:49:18,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:18,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109288831] [2022-04-06 19:49:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:19,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2022-04-06 19:49:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109288831] [2022-04-06 19:49:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109288831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353866772] [2022-04-06 19:49:19,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:19,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:19,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:19,215 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:19,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:49:19,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:19,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 19:49:19,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2022-04-06 19:49:20,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 20800 refuted. 0 times theorem prover too weak. 20631 trivial. 0 not checked. [2022-04-06 19:49:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353866772] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:21,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:21,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 6] total 35 [2022-04-06 19:49:21,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [87761878] [2022-04-06 19:49:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [87761878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:21,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:21,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 19:49:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380248647] [2022-04-06 19:49:21,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:21,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 19:49:21,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 19:49:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:49:21,166 INFO L87 Difference]: Start difference. First operand 350 states and 376 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:22,541 INFO L93 Difference]: Finished difference Result 380 states and 408 transitions. [2022-04-06 19:49:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 19:49:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 2 states have call successors, (3), 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 349 [2022-04-06 19:49:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:22,542 INFO L225 Difference]: With dead ends: 380 [2022-04-06 19:49:22,542 INFO L226 Difference]: Without dead ends: 375 [2022-04-06 19:49:22,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 694 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=3475, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:49:22,543 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 171 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:22,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 190 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:49:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-04-06 19:49:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 363. [2022-04-06 19:49:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.0782122905027933) internal successors, (386), 358 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 390 transitions. [2022-04-06 19:49:22,625 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 390 transitions. Word has length 349 [2022-04-06 19:49:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:22,625 INFO L478 AbstractCegarLoop]: Abstraction has 363 states and 390 transitions. [2022-04-06 19:49:22,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 390 transitions. [2022-04-06 19:49:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-04-06 19:49:22,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:22,628 INFO L499 BasicCegarLoop]: trace histogram [270, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:22,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 19:49:22,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:49:22,835 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash -801298973, now seen corresponding path program 71 times [2022-04-06 19:49:22,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146373083] [2022-04-06 19:49:22,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:22,862 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:22,862 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:22,862 INFO L85 PathProgramCache]: Analyzing trace with hash -801298973, now seen corresponding path program 72 times [2022-04-06 19:49:22,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:22,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943947837] [2022-04-06 19:49:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:22,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:23,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2022-04-06 19:49:23,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943947837] [2022-04-06 19:49:23,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943947837] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:23,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905700214] [2022-04-06 19:49:23,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:23,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:23,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:23,568 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:23,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:49:49,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 118 check-sat command(s) [2022-04-06 19:49:49,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 19:49:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2022-04-06 19:49:50,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2022-04-06 19:49:58,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905700214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:58,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:58,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 34] total 64 [2022-04-06 19:49:58,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:58,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2146373083] [2022-04-06 19:49:58,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2146373083] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:58,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:58,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:49:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401853984] [2022-04-06 19:49:58,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:58,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:49:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:49:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=3009, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:49:58,151 INFO L87 Difference]: Start difference. First operand 363 states and 390 transitions. Second operand has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 30 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:59,589 INFO L93 Difference]: Finished difference Result 393 states and 422 transitions. [2022-04-06 19:49:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:49:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 30 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-04-06 19:49:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:59,591 INFO L225 Difference]: With dead ends: 393 [2022-04-06 19:49:59,591 INFO L226 Difference]: Without dead ends: 388 [2022-04-06 19:49:59,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 693 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2015, Invalid=6357, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 19:49:59,593 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 177 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3034 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:59,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 207 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3034 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:49:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-04-06 19:49:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 376. [2022-04-06 19:49:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.0781671159029649) internal successors, (400), 371 states have internal predecessors, (400), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 404 transitions. [2022-04-06 19:49:59,707 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 404 transitions. Word has length 362 [2022-04-06 19:49:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:59,708 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 404 transitions. [2022-04-06 19:49:59,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 30 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 404 transitions. [2022-04-06 19:49:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-04-06 19:49:59,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:59,709 INFO L499 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:59,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:59,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:59,910 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1597840375, now seen corresponding path program 73 times [2022-04-06 19:49:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:59,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858446328] [2022-04-06 19:49:59,934 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:59,935 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:59,936 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1597840375, now seen corresponding path program 74 times [2022-04-06 19:49:59,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:59,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452953138] [2022-04-06 19:49:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:59,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:00,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2022-04-06 19:50:00,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:00,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452953138] [2022-04-06 19:50:00,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452953138] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:00,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601987617] [2022-04-06 19:50:00,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:00,613 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:00,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:50:00,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 19:50:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2022-04-06 19:50:02,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 24122 refuted. 0 times theorem prover too weak. 23940 trivial. 0 not checked. [2022-04-06 19:50:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601987617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:02,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:02,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 6] total 37 [2022-04-06 19:50:02,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858446328] [2022-04-06 19:50:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858446328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:02,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:02,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 19:50:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311616516] [2022-04-06 19:50:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:02,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 19:50:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 19:50:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:50:02,718 INFO L87 Difference]: Start difference. First operand 376 states and 404 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:04,285 INFO L93 Difference]: Finished difference Result 406 states and 436 transitions. [2022-04-06 19:50:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 19:50:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (3), 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 375 [2022-04-06 19:50:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:04,288 INFO L225 Difference]: With dead ends: 406 [2022-04-06 19:50:04,288 INFO L226 Difference]: Without dead ends: 401 [2022-04-06 19:50:04,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 746 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:50:04,289 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 183 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3193 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:04,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 149 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3193 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:50:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-04-06 19:50:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 389. [2022-04-06 19:50:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.078125) internal successors, (414), 384 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 418 transitions. [2022-04-06 19:50:04,402 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 418 transitions. Word has length 375 [2022-04-06 19:50:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:04,402 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 418 transitions. [2022-04-06 19:50:04,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 418 transitions. [2022-04-06 19:50:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-04-06 19:50:04,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:04,404 INFO L499 BasicCegarLoop]: trace histogram [290, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:04,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 19:50:04,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:50:04,605 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1293036637, now seen corresponding path program 75 times [2022-04-06 19:50:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:04,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377188877] [2022-04-06 19:50:04,631 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:04,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:04,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1293036637, now seen corresponding path program 76 times [2022-04-06 19:50:04,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:04,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523719045] [2022-04-06 19:50:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:04,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2022-04-06 19:50:05,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523719045] [2022-04-06 19:50:05,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523719045] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610507610] [2022-04-06 19:50:05,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:05,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:05,299 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:05,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:50:05,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:05,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 19:50:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2022-04-06 19:50:06,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2022-04-06 19:50:08,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610507610] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:08,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:08,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 19:50:08,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377188877] [2022-04-06 19:50:08,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377188877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:08,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:08,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 19:50:08,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584208662] [2022-04-06 19:50:08,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:08,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 19:50:08,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 19:50:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:50:08,724 INFO L87 Difference]: Start difference. First operand 389 states and 418 transitions. Second operand has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 32 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:10,348 INFO L93 Difference]: Finished difference Result 419 states and 450 transitions. [2022-04-06 19:50:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 19:50:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 32 states have internal predecessors, (123), 2 states have call successors, (3), 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 388 [2022-04-06 19:50:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:10,350 INFO L225 Difference]: With dead ends: 419 [2022-04-06 19:50:10,350 INFO L226 Difference]: Without dead ends: 414 [2022-04-06 19:50:10,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 747 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2163, Invalid=6579, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 19:50:10,351 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 189 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3400 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:10,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 131 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3400 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:50:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-04-06 19:50:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 402. [2022-04-06 19:50:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 397 states have (on average 1.0780856423173804) internal successors, (428), 397 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 432 transitions. [2022-04-06 19:50:10,453 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 432 transitions. Word has length 388 [2022-04-06 19:50:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:10,454 INFO L478 AbstractCegarLoop]: Abstraction has 402 states and 432 transitions. [2022-04-06 19:50:10,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 32 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 432 transitions. [2022-04-06 19:50:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-04-06 19:50:10,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:10,455 INFO L499 BasicCegarLoop]: trace histogram [300, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:10,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:10,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:50:10,656 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash -475361719, now seen corresponding path program 77 times [2022-04-06 19:50:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:10,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1312234454] [2022-04-06 19:50:10,680 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:10,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:10,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash -475361719, now seen corresponding path program 78 times [2022-04-06 19:50:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962609966] [2022-04-06 19:50:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:10,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:11,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 53535 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-04-06 19:50:11,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:11,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962609966] [2022-04-06 19:50:11,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962609966] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:11,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866353623] [2022-04-06 19:50:11,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:50:11,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:11,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:11,372 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:11,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 19:50:50,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 133 check-sat command(s) [2022-04-06 19:50:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:50,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 19:50:50,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 53535 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-04-06 19:50:51,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 27690 refuted. 0 times theorem prover too weak. 27495 trivial. 0 not checked. [2022-04-06 19:50:52,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866353623] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:52,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:52,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 6] total 39 [2022-04-06 19:50:52,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:52,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1312234454] [2022-04-06 19:50:52,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1312234454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:52,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:52,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:50:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793807617] [2022-04-06 19:50:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:52,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:50:52,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:52,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:50:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:50:52,416 INFO L87 Difference]: Start difference. First operand 402 states and 432 transitions. Second operand has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 33 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:54,187 INFO L93 Difference]: Finished difference Result 432 states and 464 transitions. [2022-04-06 19:50:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:50:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 33 states have internal predecessors, (127), 2 states have call successors, (3), 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 401 [2022-04-06 19:50:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:54,189 INFO L225 Difference]: With dead ends: 432 [2022-04-06 19:50:54,189 INFO L226 Difference]: Without dead ends: 427 [2022-04-06 19:50:54,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 798 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=4479, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:50:54,190 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 195 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3720 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:54,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 218 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3720 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:50:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-04-06 19:50:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 415. [2022-04-06 19:50:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 410 states have (on average 1.078048780487805) internal successors, (442), 410 states have internal predecessors, (442), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 446 transitions. [2022-04-06 19:50:54,336 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 446 transitions. Word has length 401 [2022-04-06 19:50:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:54,336 INFO L478 AbstractCegarLoop]: Abstraction has 415 states and 446 transitions. [2022-04-06 19:50:54,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 33 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 446 transitions. [2022-04-06 19:50:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-04-06 19:50:54,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:54,339 INFO L499 BasicCegarLoop]: trace histogram [310, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:54,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 19:50:54,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:54,547 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1589432675, now seen corresponding path program 79 times [2022-04-06 19:50:54,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:54,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [499664683] [2022-04-06 19:50:54,573 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:54,575 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:54,575 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1589432675, now seen corresponding path program 80 times [2022-04-06 19:50:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:54,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337690268] [2022-04-06 19:50:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58931 backedges. 0 proven. 57226 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2022-04-06 19:50:55,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:55,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337690268] [2022-04-06 19:50:55,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337690268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:55,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160066336] [2022-04-06 19:50:55,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:55,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:55,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:55,266 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:55,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 19:50:55,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 19:50:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 58931 backedges. 0 proven. 57226 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2022-04-06 19:50:56,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 58931 backedges. 0 proven. 57226 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2022-04-06 19:50:58,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160066336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:58,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:58,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 19:50:58,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:58,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [499664683] [2022-04-06 19:50:58,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [499664683] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:58,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:58,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 19:50:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102803327] [2022-04-06 19:50:58,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:58,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 19:50:58,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 19:50:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3335, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 19:50:58,767 INFO L87 Difference]: Start difference. First operand 415 states and 446 transitions. Second operand has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 34 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:00,580 INFO L93 Difference]: Finished difference Result 445 states and 478 transitions. [2022-04-06 19:51:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 19:51:00,580 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 34 states have internal predecessors, (131), 2 states have call successors, (3), 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 414 [2022-04-06 19:51:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:00,582 INFO L225 Difference]: With dead ends: 445 [2022-04-06 19:51:00,582 INFO L226 Difference]: Without dead ends: 440 [2022-04-06 19:51:00,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 797 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2435, Invalid=7465, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 19:51:00,583 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 201 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3928 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 3993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:00,583 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 185 Invalid, 3993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3928 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:51:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-04-06 19:51:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 428. [2022-04-06 19:51:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.0780141843971631) internal successors, (456), 423 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 460 transitions. [2022-04-06 19:51:00,710 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 460 transitions. Word has length 414 [2022-04-06 19:51:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:00,710 INFO L478 AbstractCegarLoop]: Abstraction has 428 states and 460 transitions. [2022-04-06 19:51:00,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 34 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 460 transitions. [2022-04-06 19:51:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-04-06 19:51:00,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:00,713 INFO L499 BasicCegarLoop]: trace histogram [320, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:00,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 19:51:00,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 19:51:00,938 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:00,938 INFO L85 PathProgramCache]: Analyzing trace with hash -315234167, now seen corresponding path program 81 times [2022-04-06 19:51:00,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:00,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665192693] [2022-04-06 19:51:00,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:00,966 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:00,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash -315234167, now seen corresponding path program 82 times [2022-04-06 19:51:00,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:00,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167035047] [2022-04-06 19:51:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:00,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:01,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 61040 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2022-04-06 19:51:01,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:01,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167035047] [2022-04-06 19:51:01,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167035047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:01,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949485589] [2022-04-06 19:51:01,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:51:01,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:01,787 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:01,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 19:51:01,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:51:01,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:01,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 19:51:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 61040 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2022-04-06 19:51:03,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 31504 refuted. 0 times theorem prover too weak. 31296 trivial. 0 not checked. [2022-04-06 19:51:03,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949485589] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:03,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:03,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 6] total 41 [2022-04-06 19:51:03,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:03,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665192693] [2022-04-06 19:51:03,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665192693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:03,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:03,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 19:51:03,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436593658] [2022-04-06 19:51:03,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:03,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 19:51:03,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 19:51:03,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:51:03,913 INFO L87 Difference]: Start difference. First operand 428 states and 460 transitions. Second operand has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:05,867 INFO L93 Difference]: Finished difference Result 458 states and 492 transitions. [2022-04-06 19:51:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 19:51:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 2 states have call successors, (3), 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 427 [2022-04-06 19:51:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:05,869 INFO L225 Difference]: With dead ends: 458 [2022-04-06 19:51:05,869 INFO L226 Difference]: Without dead ends: 453 [2022-04-06 19:51:05,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 850 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=373, Invalid=5029, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:51:05,870 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 207 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4084 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 4151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:05,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 92 Invalid, 4151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4084 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:51:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-04-06 19:51:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 441. [2022-04-06 19:51:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 436 states have (on average 1.0779816513761469) internal successors, (470), 436 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 474 transitions. [2022-04-06 19:51:05,996 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 474 transitions. Word has length 427 [2022-04-06 19:51:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:05,997 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 474 transitions. [2022-04-06 19:51:05,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 474 transitions. [2022-04-06 19:51:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-04-06 19:51:05,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:05,999 INFO L499 BasicCegarLoop]: trace histogram [330, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:06,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 19:51:06,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:06,221 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:06,222 INFO L85 PathProgramCache]: Analyzing trace with hash -546955485, now seen corresponding path program 83 times [2022-04-06 19:51:06,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:06,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346473213] [2022-04-06 19:51:06,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:06,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:06,256 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash -546955485, now seen corresponding path program 84 times [2022-04-06 19:51:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:06,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199402462] [2022-04-06 19:51:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:06,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 66792 backedges. 0 proven. 64977 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2022-04-06 19:51:07,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:07,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199402462] [2022-04-06 19:51:07,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199402462] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:07,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660609639] [2022-04-06 19:51:07,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:51:07,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:07,153 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:07,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 19:52:01,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 144 check-sat command(s) [2022-04-06 19:52:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 19:52:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 66792 backedges. 0 proven. 64977 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2022-04-06 19:52:02,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 66792 backedges. 0 proven. 64977 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2022-04-06 19:52:10,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660609639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:10,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:10,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 40] total 76 [2022-04-06 19:52:10,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346473213] [2022-04-06 19:52:10,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346473213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:10,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:10,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 19:52:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922628575] [2022-04-06 19:52:10,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:10,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 19:52:10,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 19:52:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1443, Invalid=4257, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:52:10,317 INFO L87 Difference]: Start difference. First operand 441 states and 474 transitions. Second operand has 37 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 36 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:12,453 INFO L93 Difference]: Finished difference Result 471 states and 506 transitions. [2022-04-06 19:52:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 19:52:12,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 36 states have internal predecessors, (139), 2 states have call successors, (3), 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 440 [2022-04-06 19:52:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:12,455 INFO L225 Difference]: With dead ends: 471 [2022-04-06 19:52:12,456 INFO L226 Difference]: Without dead ends: 466 [2022-04-06 19:52:12,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 843 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2852, Invalid=9138, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 19:52:12,456 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 213 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4333 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 4402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:12,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 84 Invalid, 4402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4333 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 19:52:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-04-06 19:52:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 454. [2022-04-06 19:52:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 1.0779510022271714) internal successors, (484), 449 states have internal predecessors, (484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 488 transitions. [2022-04-06 19:52:12,593 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 488 transitions. Word has length 440 [2022-04-06 19:52:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:12,594 INFO L478 AbstractCegarLoop]: Abstraction has 454 states and 488 transitions. [2022-04-06 19:52:12,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 36 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 488 transitions. [2022-04-06 19:52:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-04-06 19:52:12,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:12,597 INFO L499 BasicCegarLoop]: trace histogram [340, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:12,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 19:52:12,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:12,815 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1557597495, now seen corresponding path program 85 times [2022-04-06 19:52:12,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:12,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075503214] [2022-04-06 19:52:12,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:12,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:12,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1557597495, now seen corresponding path program 86 times [2022-04-06 19:52:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379714727] [2022-04-06 19:52:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:13,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 70907 backedges. 0 proven. 69037 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2022-04-06 19:52:13,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379714727] [2022-04-06 19:52:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379714727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885145208] [2022-04-06 19:52:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:52:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:13,651 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:13,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 19:52:13,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:52:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 19:52:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 70907 backedges. 0 proven. 69037 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2022-04-06 19:52:15,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 70907 backedges. 0 proven. 35564 refuted. 0 times theorem prover too weak. 35343 trivial. 0 not checked. [2022-04-06 19:52:16,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885145208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:16,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:16,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 6] total 43 [2022-04-06 19:52:16,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075503214] [2022-04-06 19:52:16,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075503214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:16,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:16,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 19:52:16,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527478099] [2022-04-06 19:52:16,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:16,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 19:52:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 19:52:16,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:52:16,111 INFO L87 Difference]: Start difference. First operand 454 states and 488 transitions. Second operand has 38 states, 38 states have (on average 3.763157894736842) internal successors, (143), 37 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:18,413 INFO L93 Difference]: Finished difference Result 484 states and 520 transitions. [2022-04-06 19:52:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:52:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.763157894736842) internal successors, (143), 37 states have internal predecessors, (143), 2 states have call successors, (3), 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 453 [2022-04-06 19:52:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:18,415 INFO L225 Difference]: With dead ends: 484 [2022-04-06 19:52:18,415 INFO L226 Difference]: Without dead ends: 479 [2022-04-06 19:52:18,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 902 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=5611, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 19:52:18,415 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 219 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4770 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 4770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:18,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 256 Invalid, 4841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 4770 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:52:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-04-06 19:52:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 467. [2022-04-06 19:52:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 462 states have (on average 1.077922077922078) internal successors, (498), 462 states have internal predecessors, (498), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 502 transitions. [2022-04-06 19:52:18,547 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 502 transitions. Word has length 453 [2022-04-06 19:52:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:18,548 INFO L478 AbstractCegarLoop]: Abstraction has 467 states and 502 transitions. [2022-04-06 19:52:18,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.763157894736842) internal successors, (143), 37 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:18,548 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 502 transitions. [2022-04-06 19:52:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-04-06 19:52:18,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:18,550 INFO L499 BasicCegarLoop]: trace histogram [350, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:18,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 19:52:18,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 19:52:18,768 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash -844776221, now seen corresponding path program 87 times [2022-04-06 19:52:18,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:18,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223081076] [2022-04-06 19:52:18,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:18,795 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:18,795 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash -844776221, now seen corresponding path program 88 times [2022-04-06 19:52:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:18,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475095890] [2022-04-06 19:52:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:18,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:19,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 75145 backedges. 0 proven. 73220 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2022-04-06 19:52:19,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475095890] [2022-04-06 19:52:19,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475095890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121561638] [2022-04-06 19:52:19,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:52:19,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:19,699 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:19,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 19:52:20,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:52:20,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 19:52:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 75145 backedges. 0 proven. 73220 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2022-04-06 19:52:21,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 75145 backedges. 0 proven. 73220 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2022-04-06 19:52:24,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121561638] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:24,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:24,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 19:52:24,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:24,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223081076] [2022-04-06 19:52:24,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223081076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:24,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:24,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 19:52:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649921342] [2022-04-06 19:52:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:24,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 19:52:24,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 19:52:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=4183, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:52:24,211 INFO L87 Difference]: Start difference. First operand 467 states and 502 transitions. Second operand has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:26,574 INFO L93 Difference]: Finished difference Result 497 states and 534 transitions. [2022-04-06 19:52:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 19:52:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (3), 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 466 [2022-04-06 19:52:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:26,576 INFO L225 Difference]: With dead ends: 497 [2022-04-06 19:52:26,576 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 19:52:26,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 897 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3027, Invalid=9405, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 19:52:26,578 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 225 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 5030 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 5030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:26,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 243 Invalid, 5103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 5030 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:52:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 19:52:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 480. [2022-04-06 19:52:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.0778947368421052) internal successors, (512), 475 states have internal predecessors, (512), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 516 transitions. [2022-04-06 19:52:26,732 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 516 transitions. Word has length 466 [2022-04-06 19:52:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:26,732 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 516 transitions. [2022-04-06 19:52:26,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 516 transitions. [2022-04-06 19:52:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-04-06 19:52:26,735 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:26,735 INFO L499 BasicCegarLoop]: trace histogram [360, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:26,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 19:52:26,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 19:52:26,961 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2118626569, now seen corresponding path program 89 times [2022-04-06 19:52:26,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:26,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [378139815] [2022-04-06 19:52:26,986 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:26,988 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:26,988 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2118626569, now seen corresponding path program 90 times [2022-04-06 19:52:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665721768] [2022-04-06 19:52:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:27,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 79506 backedges. 0 proven. 77526 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-04-06 19:52:27,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665721768] [2022-04-06 19:52:27,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665721768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375077130] [2022-04-06 19:52:27,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:52:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:27,858 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:27,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 19:54:27,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 159 check-sat command(s) [2022-04-06 19:54:27,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 19:54:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 79506 backedges. 0 proven. 77526 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-04-06 19:54:28,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 79506 backedges. 0 proven. 77526 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-04-06 19:54:37,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375077130] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:37,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:37,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 43] total 82 [2022-04-06 19:54:37,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:37,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [378139815] [2022-04-06 19:54:37,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [378139815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:37,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:37,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 19:54:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514483967] [2022-04-06 19:54:37,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:37,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 19:54:37,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 19:54:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:54:37,240 INFO L87 Difference]: Start difference. First operand 480 states and 516 transitions. Second operand has 40 states, 40 states have (on average 3.775) internal successors, (151), 39 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:39,642 INFO L93 Difference]: Finished difference Result 510 states and 548 transitions. [2022-04-06 19:54:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 19:54:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.775) internal successors, (151), 39 states have internal predecessors, (151), 2 states have call successors, (3), 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 479 [2022-04-06 19:54:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:39,644 INFO L225 Difference]: With dead ends: 510 [2022-04-06 19:54:39,644 INFO L226 Difference]: Without dead ends: 505 [2022-04-06 19:54:39,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 918 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3325, Invalid=10717, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 19:54:39,645 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 231 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5173 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 5248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 5173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:39,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 105 Invalid, 5248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 5173 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:54:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-06 19:54:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 493. [2022-04-06 19:54:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 488 states have (on average 1.0778688524590163) internal successors, (526), 488 states have internal predecessors, (526), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 530 transitions. [2022-04-06 19:54:39,795 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 530 transitions. Word has length 479 [2022-04-06 19:54:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:39,795 INFO L478 AbstractCegarLoop]: Abstraction has 493 states and 530 transitions. [2022-04-06 19:54:39,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.775) internal successors, (151), 39 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 530 transitions. [2022-04-06 19:54:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2022-04-06 19:54:39,798 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:39,798 INFO L499 BasicCegarLoop]: trace histogram [370, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:39,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 19:54:40,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 19:54:40,005 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash 255306403, now seen corresponding path program 91 times [2022-04-06 19:54:40,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:40,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797763373] [2022-04-06 19:54:40,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:40,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:40,031 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:40,031 INFO L85 PathProgramCache]: Analyzing trace with hash 255306403, now seen corresponding path program 92 times [2022-04-06 19:54:40,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:40,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682502386] [2022-04-06 19:54:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:40,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:40,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 83990 backedges. 0 proven. 81955 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2022-04-06 19:54:40,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682502386] [2022-04-06 19:54:40,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682502386] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485628176] [2022-04-06 19:54:40,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:54:40,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:40,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:40,959 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:54:40,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 19:54:41,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:54:41,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:41,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 19:54:41,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 83990 backedges. 0 proven. 81955 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2022-04-06 19:54:42,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 83990 backedges. 0 proven. 81955 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2022-04-06 19:54:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485628176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:45,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 19:54:45,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797763373] [2022-04-06 19:54:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797763373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:45,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:45,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 19:54:45,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454181368] [2022-04-06 19:54:45,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:45,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 19:54:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 19:54:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1677, Invalid=4643, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 19:54:45,675 INFO L87 Difference]: Start difference. First operand 493 states and 530 transitions. Second operand has 41 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 40 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:48,175 INFO L93 Difference]: Finished difference Result 523 states and 562 transitions. [2022-04-06 19:54:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 19:54:48,175 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 40 states have internal predecessors, (155), 2 states have call successors, (3), 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 492 [2022-04-06 19:54:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:48,177 INFO L225 Difference]: With dead ends: 523 [2022-04-06 19:54:48,177 INFO L226 Difference]: Without dead ends: 518 [2022-04-06 19:54:48,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 947 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3347, Invalid=10459, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 19:54:48,178 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 237 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 5651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:48,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 217 Invalid, 5651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 19:54:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-04-06 19:54:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 506. [2022-04-06 19:54:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.0778443113772456) internal successors, (540), 501 states have internal predecessors, (540), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 544 transitions. [2022-04-06 19:54:48,327 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 544 transitions. Word has length 492 [2022-04-06 19:54:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:48,328 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 544 transitions. [2022-04-06 19:54:48,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 40 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 544 transitions. [2022-04-06 19:54:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-04-06 19:54:48,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:48,331 INFO L499 BasicCegarLoop]: trace histogram [380, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:48,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 19:54:48,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:48,533 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:48,533 INFO L85 PathProgramCache]: Analyzing trace with hash -900327607, now seen corresponding path program 93 times [2022-04-06 19:54:48,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:48,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222458698] [2022-04-06 19:54:48,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:48,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:48,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash -900327607, now seen corresponding path program 94 times [2022-04-06 19:54:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:48,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927206138] [2022-04-06 19:54:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:49,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 88597 backedges. 0 proven. 86507 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2022-04-06 19:54:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927206138] [2022-04-06 19:54:49,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927206138] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236018391] [2022-04-06 19:54:49,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:54:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:49,507 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:54:49,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 19:54:49,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:54:49,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:49,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 19:54:49,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 88597 backedges. 0 proven. 86507 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2022-04-06 19:54:51,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 88597 backedges. 0 proven. 44422 refuted. 0 times theorem prover too weak. 44175 trivial. 0 not checked. [2022-04-06 19:54:51,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236018391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:51,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:51,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 6] total 47 [2022-04-06 19:54:51,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:51,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222458698] [2022-04-06 19:54:51,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222458698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:51,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:51,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 19:54:51,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739157674] [2022-04-06 19:54:51,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:51,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 19:54:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 19:54:51,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1993, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:54:51,985 INFO L87 Difference]: Start difference. First operand 506 states and 544 transitions. Second operand has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 41 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:54,656 INFO L93 Difference]: Finished difference Result 536 states and 576 transitions. [2022-04-06 19:54:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 19:54:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 41 states have internal predecessors, (159), 2 states have call successors, (3), 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 505 [2022-04-06 19:54:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:54,657 INFO L225 Difference]: With dead ends: 536 [2022-04-06 19:54:54,658 INFO L226 Difference]: Without dead ends: 531 [2022-04-06 19:54:54,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1006 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=439, Invalid=6871, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:54:54,658 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 5933 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 6012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 5933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:54,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 279 Invalid, 6012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 5933 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 19:54:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-04-06 19:54:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 519. [2022-04-06 19:54:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 514 states have (on average 1.0778210116731517) internal successors, (554), 514 states have internal predecessors, (554), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 558 transitions. [2022-04-06 19:54:54,829 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 558 transitions. Word has length 505 [2022-04-06 19:54:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:54,829 INFO L478 AbstractCegarLoop]: Abstraction has 519 states and 558 transitions. [2022-04-06 19:54:54,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 41 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 558 transitions. [2022-04-06 19:54:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-04-06 19:54:54,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:54,832 INFO L499 BasicCegarLoop]: trace histogram [390, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:54,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 19:54:55,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:54:55,049 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1764235165, now seen corresponding path program 95 times [2022-04-06 19:54:55,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:55,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055797919] [2022-04-06 19:54:55,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:55,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:55,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1764235165, now seen corresponding path program 96 times [2022-04-06 19:54:55,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:55,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445935238] [2022-04-06 19:54:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:55,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 93327 backedges. 0 proven. 91182 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2022-04-06 19:54:56,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445935238] [2022-04-06 19:54:56,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445935238] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635318979] [2022-04-06 19:54:56,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:54:56,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:56,032 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:54:56,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 19:56:33,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 170 check-sat command(s) [2022-04-06 19:56:33,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 19:56:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 93327 backedges. 0 proven. 91182 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2022-04-06 19:56:35,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 93327 backedges. 0 proven. 91182 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2022-04-06 19:56:50,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635318979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:50,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:50,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 46] total 88 [2022-04-06 19:56:50,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:50,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055797919] [2022-04-06 19:56:50,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055797919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:50,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:50,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 19:56:50,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606769342] [2022-04-06 19:56:50,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:50,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 19:56:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 19:56:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1936, Invalid=5720, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 19:56:50,846 INFO L87 Difference]: Start difference. First operand 519 states and 558 transitions. Second operand has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 42 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:53,662 INFO L93 Difference]: Finished difference Result 549 states and 590 transitions. [2022-04-06 19:56:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 19:56:53,662 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 42 states have internal predecessors, (163), 2 states have call successors, (3), 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 518 [2022-04-06 19:56:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:53,664 INFO L225 Difference]: With dead ends: 549 [2022-04-06 19:56:53,664 INFO L226 Difference]: Without dead ends: 544 [2022-04-06 19:56:53,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 993 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=3834, Invalid=12422, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 19:56:53,665 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 249 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6240 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 6321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 6240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:53,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 281 Invalid, 6321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 6240 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 19:56:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-04-06 19:56:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 532. [2022-04-06 19:56:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 527 states have (on average 1.077798861480076) internal successors, (568), 527 states have internal predecessors, (568), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 572 transitions. [2022-04-06 19:56:53,843 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 572 transitions. Word has length 518 [2022-04-06 19:56:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:53,843 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 572 transitions. [2022-04-06 19:56:53,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 42 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 572 transitions. [2022-04-06 19:56:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-04-06 19:56:53,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:53,846 INFO L499 BasicCegarLoop]: trace histogram [400, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:53,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 19:56:54,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 19:56:54,047 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash -434622071, now seen corresponding path program 97 times [2022-04-06 19:56:54,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:54,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452577179] [2022-04-06 19:56:54,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:54,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:54,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash -434622071, now seen corresponding path program 98 times [2022-04-06 19:56:54,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:54,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808465309] [2022-04-06 19:56:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:55,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 98180 backedges. 0 proven. 95980 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2022-04-06 19:56:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:55,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808465309] [2022-04-06 19:56:55,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808465309] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:55,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440844508] [2022-04-06 19:56:55,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:56:55,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:55,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:55,117 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:56:55,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 19:56:55,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:56:55,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 19:56:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 98180 backedges. 0 proven. 95980 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2022-04-06 19:56:56,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 98180 backedges. 0 proven. 49220 refuted. 0 times theorem prover too weak. 48960 trivial. 0 not checked. [2022-04-06 19:56:57,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440844508] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:57,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:57,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 6] total 49 [2022-04-06 19:56:57,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:57,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452577179] [2022-04-06 19:56:57,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452577179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:57,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:57,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 19:56:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044784405] [2022-04-06 19:56:57,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:57,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 19:56:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 19:56:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2175, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:56:57,885 INFO L87 Difference]: Start difference. First operand 532 states and 572 transitions. Second operand has 44 states, 44 states have (on average 3.7954545454545454) internal successors, (167), 43 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:57:00,798 INFO L93 Difference]: Finished difference Result 562 states and 604 transitions. [2022-04-06 19:57:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 19:57:00,798 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.7954545454545454) internal successors, (167), 43 states have internal predecessors, (167), 2 states have call successors, (3), 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 531 [2022-04-06 19:57:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:57:00,800 INFO L225 Difference]: With dead ends: 562 [2022-04-06 19:57:00,800 INFO L226 Difference]: Without dead ends: 557 [2022-04-06 19:57:00,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1058 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=461, Invalid=7549, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 19:57:00,801 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 255 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6440 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 6440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:57:00,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 168 Invalid, 6523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 6440 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 19:57:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-04-06 19:57:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 545. [2022-04-06 19:57:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 540 states have (on average 1.0777777777777777) internal successors, (582), 540 states have internal predecessors, (582), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 586 transitions. [2022-04-06 19:57:00,979 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 586 transitions. Word has length 531 [2022-04-06 19:57:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:57:00,979 INFO L478 AbstractCegarLoop]: Abstraction has 545 states and 586 transitions. [2022-04-06 19:57:00,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.7954545454545454) internal successors, (167), 43 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 586 transitions. [2022-04-06 19:57:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-04-06 19:57:00,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:57:00,982 INFO L499 BasicCegarLoop]: trace histogram [410, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:57:01,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-04-06 19:57:01,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:01,183 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:57:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:57:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 608335395, now seen corresponding path program 99 times [2022-04-06 19:57:01,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:01,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2124506134] [2022-04-06 19:57:01,207 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:01,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:01,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:57:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash 608335395, now seen corresponding path program 100 times [2022-04-06 19:57:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:57:01,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191925366] [2022-04-06 19:57:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:57:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:57:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:02,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:57:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 103156 backedges. 0 proven. 100901 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2022-04-06 19:57:02,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:57:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191925366] [2022-04-06 19:57:02,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191925366] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:57:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551307380] [2022-04-06 19:57:02,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:57:02,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:57:02,265 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:57:02,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 19:57:02,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:57:02,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:57:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 19:57:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:57:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 103156 backedges. 0 proven. 100901 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2022-04-06 19:57:04,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:57:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 103156 backedges. 0 proven. 100901 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2022-04-06 19:57:07,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551307380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:57:07,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:57:07,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 19:57:07,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:57:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2124506134] [2022-04-06 19:57:07,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2124506134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:57:07,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:57:07,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 19:57:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996864715] [2022-04-06 19:57:07,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:57:07,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 19:57:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 19:57:07,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=5635, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 19:57:07,876 INFO L87 Difference]: Start difference. First operand 545 states and 586 transitions. Second operand has 45 states, 45 states have (on average 3.8) internal successors, (171), 44 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:57:10,984 INFO L93 Difference]: Finished difference Result 575 states and 618 transitions. [2022-04-06 19:57:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 19:57:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8) internal successors, (171), 44 states have internal predecessors, (171), 2 states have call successors, (3), 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 544 [2022-04-06 19:57:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:57:10,986 INFO L225 Difference]: With dead ends: 575 [2022-04-06 19:57:10,986 INFO L226 Difference]: Without dead ends: 570 [2022-04-06 19:57:10,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1047 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4035, Invalid=12735, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 19:57:10,987 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 261 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6888 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 6973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 6888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:57:10,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 295 Invalid, 6973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 6888 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 19:57:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-04-06 19:57:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 558. [2022-04-06 19:57:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 553 states have (on average 1.077757685352622) internal successors, (596), 553 states have internal predecessors, (596), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 600 transitions. [2022-04-06 19:57:11,162 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 600 transitions. Word has length 544 [2022-04-06 19:57:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:57:11,162 INFO L478 AbstractCegarLoop]: Abstraction has 558 states and 600 transitions. [2022-04-06 19:57:11,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8) internal successors, (171), 44 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 600 transitions. [2022-04-06 19:57:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-04-06 19:57:11,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:57:11,165 INFO L499 BasicCegarLoop]: trace histogram [420, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:57:11,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 19:57:11,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 19:57:11,365 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:57:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:57:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2091779127, now seen corresponding path program 101 times [2022-04-06 19:57:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:11,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025108420] [2022-04-06 19:57:11,390 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:11,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:11,391 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:57:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2091779127, now seen corresponding path program 102 times [2022-04-06 19:57:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:57:11,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654906625] [2022-04-06 19:57:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:57:11,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:57:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:12,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:57:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 108255 backedges. 0 proven. 105945 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2022-04-06 19:57:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:57:12,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654906625] [2022-04-06 19:57:12,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654906625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:57:12,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525743924] [2022-04-06 19:57:12,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:57:12,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:12,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:57:12,504 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:57:12,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 19:59:33,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 185 check-sat command(s) [2022-04-06 19:59:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 19:59:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 108255 backedges. 0 proven. 105945 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2022-04-06 19:59:35,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 108255 backedges. 0 proven. 105945 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2022-04-06 19:59:41,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525743924] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:41,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:41,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 48] total 93 [2022-04-06 19:59:41,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:41,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025108420] [2022-04-06 19:59:41,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025108420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:41,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:41,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 19:59:41,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325910165] [2022-04-06 19:59:41,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:41,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 19:59:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 19:59:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2162, Invalid=6394, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 19:59:41,414 INFO L87 Difference]: Start difference. First operand 558 states and 600 transitions. Second operand has 46 states, 46 states have (on average 3.8043478260869565) internal successors, (175), 45 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:44,721 INFO L93 Difference]: Finished difference Result 588 states and 632 transitions. [2022-04-06 19:59:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 19:59:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8043478260869565) internal successors, (175), 45 states have internal predecessors, (175), 2 states have call successors, (3), 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 557 [2022-04-06 19:59:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:44,723 INFO L225 Difference]: With dead ends: 588 [2022-04-06 19:59:44,723 INFO L226 Difference]: Without dead ends: 583 [2022-04-06 19:59:44,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1069 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4288, Invalid=14072, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 19:59:44,725 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 267 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 7064 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 7064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:44,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 142 Invalid, 7151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 7064 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 19:59:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-04-06 19:59:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 571. [2022-04-06 19:59:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 566 states have (on average 1.0777385159010602) internal successors, (610), 566 states have internal predecessors, (610), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 614 transitions. [2022-04-06 19:59:44,909 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 614 transitions. Word has length 557 [2022-04-06 19:59:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:44,909 INFO L478 AbstractCegarLoop]: Abstraction has 571 states and 614 transitions. [2022-04-06 19:59:44,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8043478260869565) internal successors, (175), 45 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 614 transitions. [2022-04-06 19:59:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2022-04-06 19:59:44,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:44,912 INFO L499 BasicCegarLoop]: trace histogram [430, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:44,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 19:59:45,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:45,113 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash 70472675, now seen corresponding path program 103 times [2022-04-06 19:59:45,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761712145] [2022-04-06 19:59:45,140 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:45,142 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:45,142 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:45,147 INFO L85 PathProgramCache]: Analyzing trace with hash 70472675, now seen corresponding path program 104 times [2022-04-06 19:59:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:45,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278228833] [2022-04-06 19:59:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:46,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 113477 backedges. 0 proven. 111112 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2022-04-06 19:59:46,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:46,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278228833] [2022-04-06 19:59:46,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278228833] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:46,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706704217] [2022-04-06 19:59:46,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:59:46,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:46,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:46,348 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:59:46,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 19:59:47,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:59:47,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 19:59:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 113477 backedges. 0 proven. 111112 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2022-04-06 19:59:48,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 113477 backedges. 0 proven. 111112 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2022-04-06 19:59:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706704217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:52,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:52,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 19:59:52,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761712145] [2022-04-06 19:59:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761712145] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:52,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:52,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 19:59:52,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174258907] [2022-04-06 19:59:52,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:52,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 19:59:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 19:59:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2205, Invalid=6167, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 19:59:52,557 INFO L87 Difference]: Start difference. First operand 571 states and 614 transitions. Second operand has 47 states, 47 states have (on average 3.8085106382978724) internal successors, (179), 46 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:56,035 INFO L93 Difference]: Finished difference Result 601 states and 646 transitions. [2022-04-06 19:59:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 19:59:56,035 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8085106382978724) internal successors, (179), 46 states have internal predecessors, (179), 2 states have call successors, (3), 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 570 [2022-04-06 19:59:56,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:56,037 INFO L225 Difference]: With dead ends: 601 [2022-04-06 19:59:56,037 INFO L226 Difference]: Without dead ends: 596 [2022-04-06 19:59:56,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1097 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4403, Invalid=13957, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 19:59:56,038 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 273 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7548 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 7637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 7548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:56,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 289 Invalid, 7637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 7548 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 19:59:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-04-06 19:59:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 584. [2022-04-06 19:59:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.077720207253886) internal successors, (624), 579 states have internal predecessors, (624), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 628 transitions. [2022-04-06 19:59:56,241 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 628 transitions. Word has length 570 [2022-04-06 19:59:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:56,241 INFO L478 AbstractCegarLoop]: Abstraction has 584 states and 628 transitions. [2022-04-06 19:59:56,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.8085106382978724) internal successors, (179), 46 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 628 transitions. [2022-04-06 19:59:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2022-04-06 19:59:56,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:56,244 INFO L499 BasicCegarLoop]: trace histogram [440, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:56,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 19:59:56,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 19:59:56,445 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash -423135735, now seen corresponding path program 105 times [2022-04-06 19:59:56,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:56,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237521333] [2022-04-06 19:59:56,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:56,472 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:56,472 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash -423135735, now seen corresponding path program 106 times [2022-04-06 19:59:56,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:56,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814539206] [2022-04-06 19:59:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:56,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:57,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 118822 backedges. 0 proven. 116402 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-04-06 19:59:57,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:57,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814539206] [2022-04-06 19:59:57,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814539206] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:57,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663747574] [2022-04-06 19:59:57,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:59:57,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:57,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:57,756 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:59:57,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 19:59:57,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:59:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:57,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 19:59:57,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 118822 backedges. 0 proven. 116402 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-04-06 19:59:59,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 118822 backedges. 0 proven. 59554 refuted. 0 times theorem prover too weak. 59268 trivial. 0 not checked. [2022-04-06 20:00:00,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663747574] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:00,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:00,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 6] total 53 [2022-04-06 20:00:00,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237521333] [2022-04-06 20:00:00,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237521333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:00,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:00,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:00:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920525268] [2022-04-06 20:00:00,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:00,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:00:00,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:00:00,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2563, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:00:00,758 INFO L87 Difference]: Start difference. First operand 584 states and 628 transitions. Second operand has 48 states, 48 states have (on average 3.8125) internal successors, (183), 47 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:04,456 INFO L93 Difference]: Finished difference Result 614 states and 660 transitions. [2022-04-06 20:00:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:00:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.8125) internal successors, (183), 47 states have internal predecessors, (183), 2 states have call successors, (3), 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 583 [2022-04-06 20:00:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:04,458 INFO L225 Difference]: With dead ends: 614 [2022-04-06 20:00:04,458 INFO L226 Difference]: Without dead ends: 609 [2022-04-06 20:00:04,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1260 GetRequests, 1162 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=505, Invalid=9001, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:00:04,459 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 279 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 7900 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 7991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 7900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:04,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 296 Invalid, 7991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 7900 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:00:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-04-06 20:00:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 597. [2022-04-06 20:00:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 592 states have (on average 1.0777027027027026) internal successors, (638), 592 states have internal predecessors, (638), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 642 transitions. [2022-04-06 20:00:04,666 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 642 transitions. Word has length 583 [2022-04-06 20:00:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:04,666 INFO L478 AbstractCegarLoop]: Abstraction has 597 states and 642 transitions. [2022-04-06 20:00:04,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.8125) internal successors, (183), 47 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 642 transitions. [2022-04-06 20:00:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-04-06 20:00:04,669 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:04,669 INFO L499 BasicCegarLoop]: trace histogram [450, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:04,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:00:04,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:00:04,869 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash -798588509, now seen corresponding path program 107 times [2022-04-06 20:00:04,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1053355314] [2022-04-06 20:00:04,894 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:00:04,895 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:00:04,896 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:00:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash -798588509, now seen corresponding path program 108 times [2022-04-06 20:00:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630360768] [2022-04-06 20:00:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:04,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:06,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 124290 backedges. 0 proven. 121815 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2022-04-06 20:00:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630360768] [2022-04-06 20:00:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630360768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42904015] [2022-04-06 20:00:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:06,203 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:06,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process