/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:44:33,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:44:33,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:44:33,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 20:44:33,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 20:44:33,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 20:44:33,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 20:44:33,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 20:44:33,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 20:44:33,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 20:44:33,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 20:44:33,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 20:44:33,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 20:44:33,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 20:44:33,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 20:44:33,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 20:44:33,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 20:44:33,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 20:44:33,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 20:44:33,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 20:44:33,700 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 20:44:33,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 20:44:33,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 20:44:33,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 20:44:33,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 20:44:33,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 20:44:33,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 20:44:33,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 20:44:33,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 20:44:33,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 20:44:33,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 20:44:33,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 20:44:33,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 20:44:33,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 20:44:33,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 20:44:33,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 20:44:33,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 20:44:33,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 20:44:33,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 20:44:33,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:44:33,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:44:33,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:44:33,714 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 20:44:33,723 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:44:33,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:44:33,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:44:33,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:44:33,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:44:33,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:44:33,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:44:33,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:44:33,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:44:33,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:44:33,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:44:33,726 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:44:33,727 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:44:33,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:44:33,727 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:44:33,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:44:33,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:44:33,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:44:33,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:44:33,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:44:33,938 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:44:33,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-04-06 20:44:33,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04e27cc99/0efcf926b66c491b8802f6c152eca585/FLAG14a6dc994 [2022-04-06 20:44:34,348 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:44:34,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-04-06 20:44:34,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04e27cc99/0efcf926b66c491b8802f6c152eca585/FLAG14a6dc994 [2022-04-06 20:44:34,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04e27cc99/0efcf926b66c491b8802f6c152eca585 [2022-04-06 20:44:34,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:44:34,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:44:34,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:44:34,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:44:34,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:44:34,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f210f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34, skipping insertion in model container [2022-04-06 20:44:34,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:44:34,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:44:34,500 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c[319,332] [2022-04-06 20:44:34,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:44:34,524 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:44:34,532 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c[319,332] [2022-04-06 20:44:34,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:44:34,548 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:44:34,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34 WrapperNode [2022-04-06 20:44:34,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:44:34,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:44:34,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:44:34,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:44:34,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:44:34,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:44:34,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:44:34,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:44:34,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (1/1) ... [2022-04-06 20:44:34,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:44:34,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:34,625 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 20:44:34,675 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 20:44:34,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:44:34,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:44:34,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:44:34,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:44:34,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:44:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:44:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:44:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:44:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:44:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:44:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:44:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:44:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:44:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:44:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:44:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:44:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:44:34,756 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:44:34,757 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:44:34,874 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:44:34,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:44:34,878 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 20:44:34,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:44:34 BoogieIcfgContainer [2022-04-06 20:44:34,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:44:34,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:44:34,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:44:34,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:44:34,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:44:34" (1/3) ... [2022-04-06 20:44:34,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da08e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:44:34, skipping insertion in model container [2022-04-06 20:44:34,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:44:34" (2/3) ... [2022-04-06 20:44:34,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da08e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:44:34, skipping insertion in model container [2022-04-06 20:44:34,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:44:34" (3/3) ... [2022-04-06 20:44:34,898 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2022-04-06 20:44:34,901 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:44:34,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:44:34,942 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:44:34,967 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 20:44:34,968 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:44:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:44:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:44:34,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:34,981 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:34,981 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1104150160, now seen corresponding path program 1 times [2022-04-06 20:44:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1249757106] [2022-04-06 20:44:34,999 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:44:34,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1104150160, now seen corresponding path program 2 times [2022-04-06 20:44:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:35,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348917714] [2022-04-06 20:44:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,129 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 20:44:35,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:35,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348917714] [2022-04-06 20:44:35,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348917714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:44:35,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1249757106] [2022-04-06 20:44:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1249757106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:44:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575122886] [2022-04-06 20:44:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:35,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:44:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:44:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:44:35,164 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:35,212 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-04-06 20:44:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:44:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 20:44:35,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:35,222 INFO L225 Difference]: With dead ends: 36 [2022-04-06 20:44:35,222 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:44:35,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:44:35,227 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:35,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:44:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:44:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-04-06 20:44:35,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-04-06 20:44:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:35,254 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-04-06 20:44:35,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-04-06 20:44:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:44:35,256 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:35,256 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:35,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:44:35,256 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1394135754, now seen corresponding path program 1 times [2022-04-06 20:44:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310523090] [2022-04-06 20:44:35,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:44:35,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1394135754, now seen corresponding path program 2 times [2022-04-06 20:44:35,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:35,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918776921] [2022-04-06 20:44:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:35,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,344 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 20:44:35,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918776921] [2022-04-06 20:44:35,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918776921] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:44:35,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310523090] [2022-04-06 20:44:35,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310523090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:44:35,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326423506] [2022-04-06 20:44:35,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:35,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:44:35,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:44:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:44:35,347 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:35,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:35,393 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-04-06 20:44:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:44:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 20:44:35,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:35,394 INFO L225 Difference]: With dead ends: 30 [2022-04-06 20:44:35,395 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:44:35,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:44:35,396 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:35,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:44:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 20:44:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-04-06 20:44:35,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-04-06 20:44:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:35,401 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-04-06 20:44:35,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-04-06 20:44:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:44:35,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:35,402 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:35,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:44:35,402 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 479542393, now seen corresponding path program 1 times [2022-04-06 20:44:35,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521574509] [2022-04-06 20:44:35,415 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:35,415 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash 479542393, now seen corresponding path program 2 times [2022-04-06 20:44:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:35,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132333935] [2022-04-06 20:44:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:35,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:35,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:35,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132333935] [2022-04-06 20:44:35,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132333935] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:44:35,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521574509] [2022-04-06 20:44:35,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521574509] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:44:35,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107876004] [2022-04-06 20:44:35,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:35,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:44:35,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:44:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:44:35,448 INFO L87 Difference]: Start difference. First operand 19 states and 22 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 20:44:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:35,491 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 20:44:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:44:35,492 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 20:44:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:35,493 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:44:35,493 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:44:35,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:44:35,494 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:35,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:44:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 20:44:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-06 20:44:35,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-04-06 20:44:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:35,502 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-06 20:44:35,502 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 20:44:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-06 20:44:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:44:35,503 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:35,503 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:35,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:44:35,505 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2015526538, now seen corresponding path program 1 times [2022-04-06 20:44:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062851231] [2022-04-06 20:44:35,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:35,509 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2015526538, now seen corresponding path program 2 times [2022-04-06 20:44:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:35,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069035065] [2022-04-06 20:44:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:35,608 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 20:44:35,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:35,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069035065] [2022-04-06 20:44:35,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069035065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:35,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658298359] [2022-04-06 20:44:35,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:35,624 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 20:44:35,625 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 20:44:35,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:35,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 20:44:35,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:35,703 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 20:44:35,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:35,783 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 20:44:35,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658298359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:35,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:35,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 20:44:35,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:35,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062851231] [2022-04-06 20:44:35,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062851231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:44:35,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275107979] [2022-04-06 20:44:35,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:35,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:44:35,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:44:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:44:35,786 INFO L87 Difference]: Start difference. First operand 20 states and 23 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 20:44:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:35,823 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-06 20:44:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:44:35,823 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 20:44:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:35,824 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:44:35,824 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 20:44:35,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:44:35,825 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:35,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 20:44:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 20:44:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-06 20:44:35,829 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-04-06 20:44:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:35,829 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-06 20:44:35,829 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 20:44:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-06 20:44:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:44:35,830 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:35,830 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:35,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 20:44:36,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:36,061 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -928742297, now seen corresponding path program 3 times [2022-04-06 20:44:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804960633] [2022-04-06 20:44:36,063 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:36,063 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash -928742297, now seen corresponding path program 4 times [2022-04-06 20:44:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:36,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655293146] [2022-04-06 20:44:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655293146] [2022-04-06 20:44:36,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655293146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:36,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:36,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:44:36,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:36,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804960633] [2022-04-06 20:44:36,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804960633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:36,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:36,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:44:36,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908156595] [2022-04-06 20:44:36,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:36,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:44:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:44:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:44:36,092 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 20:44:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:36,119 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-06 20:44:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:44:36,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 17 [2022-04-06 20:44:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:36,120 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:44:36,120 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 20:44:36,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:44:36,121 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:36,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 20:44:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 20:44:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-04-06 20:44:36,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2022-04-06 20:44:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:36,126 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-04-06 20:44:36,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 20:44:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-04-06 20:44:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:44:36,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:36,127 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:36,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 20:44:36,128 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash -796991294, now seen corresponding path program 1 times [2022-04-06 20:44:36,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [256921951] [2022-04-06 20:44:36,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:36,130 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash -796991294, now seen corresponding path program 2 times [2022-04-06 20:44:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178914316] [2022-04-06 20:44:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:36,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178914316] [2022-04-06 20:44:36,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178914316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870199099] [2022-04-06 20:44:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:36,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:36,185 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 20:44:36,225 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 20:44:36,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:36,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:36,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:36,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:36,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870199099] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:36,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:36,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:44:36,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:36,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [256921951] [2022-04-06 20:44:36,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [256921951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:36,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:36,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:44:36,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344810360] [2022-04-06 20:44:36,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:36,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:44:36,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:44:36,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:44:36,356 INFO L87 Difference]: Start difference. First operand 23 states and 26 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 20:44:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:36,420 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-04-06 20:44:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:44:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:44:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:36,422 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:44:36,422 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:44:36,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:44:36,423 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:36,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:44:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 20:44:36,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-06 20:44:36,428 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2022-04-06 20:44:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:36,428 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-06 20:44:36,428 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 20:44:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-06 20:44:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:44:36,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:36,429 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:36,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 20:44:36,645 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,SelfDestructingSolverStorable5 [2022-04-06 20:44:36,645 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1654698015, now seen corresponding path program 3 times [2022-04-06 20:44:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [188812600] [2022-04-06 20:44:36,648 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:36,648 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:36,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1654698015, now seen corresponding path program 4 times [2022-04-06 20:44:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:36,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338898723] [2022-04-06 20:44:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:36,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:36,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338898723] [2022-04-06 20:44:36,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338898723] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105827780] [2022-04-06 20:44:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:36,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:36,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:36,703 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 20:44:36,704 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 20:44:36,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:36,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:36,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:44:36,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:36,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:36,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105827780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:36,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:36,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:44:36,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:36,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [188812600] [2022-04-06 20:44:36,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [188812600] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:36,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:36,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:44:36,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550199739] [2022-04-06 20:44:36,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:36,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:44:36,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:44:36,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:44:36,833 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 20:44:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:36,889 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-04-06 20:44:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:44:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 20:44:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:36,890 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:44:36,890 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:44:36,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:44:36,891 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:36,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:44:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 20:44:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-06 20:44:36,895 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2022-04-06 20:44:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:36,895 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-06 20:44:36,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 20:44:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-06 20:44:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:44:36,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:36,896 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:36,913 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 20:44:37,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:37,112 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash -208921540, now seen corresponding path program 5 times [2022-04-06 20:44:37,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:37,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701466250] [2022-04-06 20:44:37,114 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:37,114 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:37,114 INFO L85 PathProgramCache]: Analyzing trace with hash -208921540, now seen corresponding path program 6 times [2022-04-06 20:44:37,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:37,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911458082] [2022-04-06 20:44:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:37,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911458082] [2022-04-06 20:44:37,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911458082] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728496964] [2022-04-06 20:44:37,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:37,171 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 20:44:37,187 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 20:44:37,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:37,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:37,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:44:37,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:44:37,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728496964] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:37,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:37,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-04-06 20:44:37,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:37,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701466250] [2022-04-06 20:44:37,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701466250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:37,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:37,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:44:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391433859] [2022-04-06 20:44:37,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:37,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:44:37,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:44:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:44:37,315 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 20:44:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:37,382 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-04-06 20:44:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:44:37,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 20:44:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:37,384 INFO L225 Difference]: With dead ends: 42 [2022-04-06 20:44:37,384 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:44:37,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:44:37,385 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:37,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:44:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 20:44:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-04-06 20:44:37,389 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2022-04-06 20:44:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:37,389 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-04-06 20:44:37,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 20:44:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-04-06 20:44:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:44:37,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:37,390 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:37,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:37,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:37,590 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash -145951463, now seen corresponding path program 7 times [2022-04-06 20:44:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390984705] [2022-04-06 20:44:37,592 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:37,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash -145951463, now seen corresponding path program 8 times [2022-04-06 20:44:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:37,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056528103] [2022-04-06 20:44:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:37,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:37,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:37,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:37,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056528103] [2022-04-06 20:44:37,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056528103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:37,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342107305] [2022-04-06 20:44:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:37,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:37,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:37,644 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 20:44:37,688 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 20:44:37,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:37,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:37,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:44:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:37,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:37,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342107305] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:37,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:37,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:44:37,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390984705] [2022-04-06 20:44:37,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390984705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:37,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:37,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:44:37,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993209871] [2022-04-06 20:44:37,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:37,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:44:37,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:37,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:44:37,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:44:37,798 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:37,851 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-04-06 20:44:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:44:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:44:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:37,852 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:44:37,852 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 20:44:37,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:44:37,853 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:37,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 20:44:37,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 20:44:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-06 20:44:37,857 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 25 [2022-04-06 20:44:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:37,857 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-06 20:44:37,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-06 20:44:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:44:37,858 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:37,858 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:37,890 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 20:44:38,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:38,068 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash 238750390, now seen corresponding path program 9 times [2022-04-06 20:44:38,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798697557] [2022-04-06 20:44:38,070 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:38,070 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash 238750390, now seen corresponding path program 10 times [2022-04-06 20:44:38,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:38,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229382024] [2022-04-06 20:44:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:38,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:38,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:38,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229382024] [2022-04-06 20:44:38,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229382024] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:38,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391150932] [2022-04-06 20:44:38,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:38,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:38,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:38,145 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 20:44:38,146 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 20:44:38,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:38,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:38,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:44:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:38,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391150932] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:38,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:38,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:44:38,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798697557] [2022-04-06 20:44:38,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798697557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:38,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:38,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:44:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293194336] [2022-04-06 20:44:38,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:38,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:44:38,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:38,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:44:38,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:44:38,320 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 20:44:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:38,393 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-04-06 20:44:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:44:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 27 [2022-04-06 20:44:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:38,395 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:44:38,395 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 20:44:38,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:44:38,396 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:38,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 20:44:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 20:44:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-06 20:44:38,405 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2022-04-06 20:44:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:38,406 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-06 20:44:38,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 20:44:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-06 20:44:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:44:38,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:38,408 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:38,424 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 20:44:38,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:38,615 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 570043667, now seen corresponding path program 11 times [2022-04-06 20:44:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:38,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43457273] [2022-04-06 20:44:38,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:38,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 570043667, now seen corresponding path program 12 times [2022-04-06 20:44:38,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:38,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290702514] [2022-04-06 20:44:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:38,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:38,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:38,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290702514] [2022-04-06 20:44:38,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290702514] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395372407] [2022-04-06 20:44:38,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:38,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:38,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:38,744 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 20:44:38,752 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 20:44:38,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:38,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:38,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:44:38,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:44:38,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395372407] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:38,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:38,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-04-06 20:44:38,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:38,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43457273] [2022-04-06 20:44:38,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43457273] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:38,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:38,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:44:38,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476537068] [2022-04-06 20:44:38,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:38,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:44:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:44:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:44:38,887 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:38,975 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-04-06 20:44:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:44:38,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:44:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:38,976 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:44:38,976 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 20:44:38,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:44:38,977 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:38,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 20:44:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 20:44:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-04-06 20:44:38,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2022-04-06 20:44:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:38,981 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-04-06 20:44:38,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-04-06 20:44:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:44:38,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:38,982 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:39,004 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 20:44:39,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:39,198 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1115302960, now seen corresponding path program 13 times [2022-04-06 20:44:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:39,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273844063] [2022-04-06 20:44:39,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:39,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:39,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1115302960, now seen corresponding path program 14 times [2022-04-06 20:44:39,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:39,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932109041] [2022-04-06 20:44:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:39,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:39,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:39,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:39,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932109041] [2022-04-06 20:44:39,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932109041] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:39,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853791860] [2022-04-06 20:44:39,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:39,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:39,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:39,284 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 20:44:39,285 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 20:44:39,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:39,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:44:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:39,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:39,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853791860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:39,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:39,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:44:39,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273844063] [2022-04-06 20:44:39,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273844063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:39,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:39,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:44:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129546541] [2022-04-06 20:44:39,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:39,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:44:39,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:44:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:44:39,506 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 20:44:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:39,611 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-04-06 20:44:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:44:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:44:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:39,612 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:44:39,612 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:44:39,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:44:39,613 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:39,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:44:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 20:44:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-04-06 20:44:39,617 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2022-04-06 20:44:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:39,617 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-04-06 20:44:39,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 20:44:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-04-06 20:44:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:44:39,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:39,617 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:39,635 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 20:44:39,827 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,SelfDestructingSolverStorable11 [2022-04-06 20:44:39,827 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:39,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1123473421, now seen corresponding path program 15 times [2022-04-06 20:44:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:39,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956876638] [2022-04-06 20:44:39,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:39,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1123473421, now seen corresponding path program 16 times [2022-04-06 20:44:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722480183] [2022-04-06 20:44:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:39,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:39,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:39,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722480183] [2022-04-06 20:44:39,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722480183] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:39,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109997441] [2022-04-06 20:44:39,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:39,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:39,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:39,936 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 20:44:39,937 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 20:44:39,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:39,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:44:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:40,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:40,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109997441] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:40,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:40,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:44:40,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956876638] [2022-04-06 20:44:40,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956876638] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:40,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:40,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:44:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024350461] [2022-04-06 20:44:40,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:40,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:44:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:44:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:44:40,232 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:40,360 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-04-06 20:44:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:44:40,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:44:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:40,363 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:44:40,363 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 20:44:40,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:44:40,366 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:40,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 20:44:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 20:44:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-04-06 20:44:40,374 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 33 [2022-04-06 20:44:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:40,375 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-04-06 20:44:40,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-04-06 20:44:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:44:40,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:40,375 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:40,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 20:44:40,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:44:40,592 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash 385351850, now seen corresponding path program 17 times [2022-04-06 20:44:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:40,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497622595] [2022-04-06 20:44:40,595 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:40,595 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 385351850, now seen corresponding path program 18 times [2022-04-06 20:44:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:40,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517243716] [2022-04-06 20:44:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:40,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:40,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517243716] [2022-04-06 20:44:40,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517243716] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25234212] [2022-04-06 20:44:40,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:40,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:40,682 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 20:44:40,685 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 20:44:40,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:40,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:40,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:44:40,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:44:40,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25234212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:40,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:40,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-04-06 20:44:40,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:40,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497622595] [2022-04-06 20:44:40,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497622595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:40,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:40,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:44:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775444070] [2022-04-06 20:44:40,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:40,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:44:40,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:44:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:44:40,870 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 20:44:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:41,036 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-04-06 20:44:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:44:41,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:44:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:41,037 INFO L225 Difference]: With dead ends: 54 [2022-04-06 20:44:41,037 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:44:41,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:44:41,038 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:41,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:44:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-06 20:44:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-04-06 20:44:41,055 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2022-04-06 20:44:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:41,055 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-04-06 20:44:41,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 20:44:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-04-06 20:44:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:44:41,055 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:41,056 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:41,073 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 20:44:41,271 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,SelfDestructingSolverStorable13 [2022-04-06 20:44:41,271 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash -279874041, now seen corresponding path program 19 times [2022-04-06 20:44:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638158941] [2022-04-06 20:44:41,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:41,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -279874041, now seen corresponding path program 20 times [2022-04-06 20:44:41,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:41,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993208179] [2022-04-06 20:44:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:41,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:41,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:41,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:41,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993208179] [2022-04-06 20:44:41,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993208179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:41,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900513762] [2022-04-06 20:44:41,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:41,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:41,367 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 20:44:41,368 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 20:44:41,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:44:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:41,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:41,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900513762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:41,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:41,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:44:41,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:41,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638158941] [2022-04-06 20:44:41,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638158941] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:41,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:41,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:44:41,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536513872] [2022-04-06 20:44:41,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:41,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:44:41,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:44:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:44:41,648 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:41,786 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-04-06 20:44:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:44:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:44:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:41,786 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:44:41,787 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 20:44:41,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:44:41,787 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:41,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 20:44:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 20:44:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-04-06 20:44:41,791 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2022-04-06 20:44:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:41,791 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-04-06 20:44:41,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-04-06 20:44:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:44:41,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:41,792 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:41,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:42,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:44:42,005 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 388171812, now seen corresponding path program 21 times [2022-04-06 20:44:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:42,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2119385588] [2022-04-06 20:44:42,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:42,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 388171812, now seen corresponding path program 22 times [2022-04-06 20:44:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:42,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881287519] [2022-04-06 20:44:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:42,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:42,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881287519] [2022-04-06 20:44:42,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881287519] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759154753] [2022-04-06 20:44:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:42,101 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 20:44:42,102 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 20:44:42,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:42,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:42,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:44:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:42,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:42,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759154753] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:42,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:42,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:44:42,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:42,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2119385588] [2022-04-06 20:44:42,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2119385588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:42,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:42,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:44:42,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140497682] [2022-04-06 20:44:42,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:42,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:44:42,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:42,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:44:42,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:44:42,469 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 20:44:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:42,606 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-04-06 20:44:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:44:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 39 [2022-04-06 20:44:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:42,607 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:44:42,607 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 20:44:42,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:44:42,608 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:42,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 20:44:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 20:44:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-04-06 20:44:42,611 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 39 [2022-04-06 20:44:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:42,612 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-04-06 20:44:42,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 20:44:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-04-06 20:44:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:44:42,612 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:42,612 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:42,656 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 20:44:42,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 20:44:42,819 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:42,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1864857855, now seen corresponding path program 23 times [2022-04-06 20:44:42,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:42,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [261679166] [2022-04-06 20:44:42,822 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:42,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1864857855, now seen corresponding path program 24 times [2022-04-06 20:44:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:42,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531813449] [2022-04-06 20:44:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:42,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:42,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:42,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531813449] [2022-04-06 20:44:42,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531813449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:42,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980582761] [2022-04-06 20:44:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:42,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:42,949 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 20:44:42,950 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 20:44:42,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:42,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:44:43,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:44:43,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980582761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:43,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:43,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-04-06 20:44:43,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:43,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [261679166] [2022-04-06 20:44:43,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [261679166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:43,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:43,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:44:43,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028408274] [2022-04-06 20:44:43,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:43,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:44:43,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:44:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:44:43,151 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 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 20:44:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:43,340 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-04-06 20:44:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:44:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:44:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:43,341 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:44:43,341 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:44:43,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:44:43,341 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:43,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:44:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 20:44:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-04-06 20:44:43,349 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2022-04-06 20:44:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:43,350 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-04-06 20:44:43,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 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 20:44:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-04-06 20:44:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:44:43,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:43,352 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:43,368 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 20:44:43,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:44:43,569 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:43,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1932116638, now seen corresponding path program 25 times [2022-04-06 20:44:43,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:43,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068126649] [2022-04-06 20:44:43,571 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:43,571 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:43,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1932116638, now seen corresponding path program 26 times [2022-04-06 20:44:43,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:43,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993969085] [2022-04-06 20:44:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:43,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:43,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:43,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993969085] [2022-04-06 20:44:43,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993969085] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:43,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734116416] [2022-04-06 20:44:43,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:43,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:43,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:43,704 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 20:44:43,705 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 20:44:43,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:43,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:44:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:44,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734116416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:44,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:44,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:44:44,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068126649] [2022-04-06 20:44:44,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068126649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:44,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:44,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:44:44,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794437880] [2022-04-06 20:44:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:44,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:44:44,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:44:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:44:44,080 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 20:44:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:44,241 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-04-06 20:44:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:44:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 43 [2022-04-06 20:44:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:44,241 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:44:44,241 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:44:44,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:44:44,242 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:44,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:44:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 20:44:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-04-06 20:44:44,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2022-04-06 20:44:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:44,246 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-04-06 20:44:44,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 20:44:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-04-06 20:44:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:44:44,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:44,246 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:44,262 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 20:44:44,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:44,455 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash 102402811, now seen corresponding path program 27 times [2022-04-06 20:44:44,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:44,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155401912] [2022-04-06 20:44:44,457 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:44,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash 102402811, now seen corresponding path program 28 times [2022-04-06 20:44:44,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:44,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152373825] [2022-04-06 20:44:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:44,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152373825] [2022-04-06 20:44:44,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152373825] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689924963] [2022-04-06 20:44:44,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:44,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:44,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:44,590 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 20:44:44,591 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 20:44:44,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:44,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:44,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:44:44,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:44,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:44,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689924963] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:44,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:44,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:44:44,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155401912] [2022-04-06 20:44:44,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155401912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:44,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:44,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:44:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150637403] [2022-04-06 20:44:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:44,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:44:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:44:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:44:44,998 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:45,183 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-04-06 20:44:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:44:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:44:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:45,184 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:44:45,184 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:44:45,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:44:45,186 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:45,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 34 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:44:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 20:44:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-04-06 20:44:45,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 45 [2022-04-06 20:44:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:45,189 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-04-06 20:44:45,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-04-06 20:44:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:44:45,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:45,190 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:45,207 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 20:44:45,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:45,405 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1610960872, now seen corresponding path program 29 times [2022-04-06 20:44:45,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:45,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114969074] [2022-04-06 20:44:45,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:45,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:45,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1610960872, now seen corresponding path program 30 times [2022-04-06 20:44:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:45,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400369052] [2022-04-06 20:44:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:45,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400369052] [2022-04-06 20:44:45,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400369052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:45,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579574465] [2022-04-06 20:44:45,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:45,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:45,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:45,561 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 20:44:45,562 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 20:44:45,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:44:45,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:44:45,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579574465] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:45,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:45,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5, 5] total 26 [2022-04-06 20:44:45,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:45,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114969074] [2022-04-06 20:44:45,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114969074] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:45,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:45,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:44:45,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745420142] [2022-04-06 20:44:45,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:45,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:44:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:44:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:44:45,757 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 20:44:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:45,921 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-04-06 20:44:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:44:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 47 [2022-04-06 20:44:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:45,922 INFO L225 Difference]: With dead ends: 66 [2022-04-06 20:44:45,922 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:44:45,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=540, Invalid=1266, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:44:45,923 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:45,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:44:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-06 20:44:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-04-06 20:44:45,930 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2022-04-06 20:44:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:45,930 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-04-06 20:44:45,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 20:44:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-04-06 20:44:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:44:45,930 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:45,931 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:45,961 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 20:44:46,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:46,131 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:46,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1113981429, now seen corresponding path program 31 times [2022-04-06 20:44:46,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:46,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [55555579] [2022-04-06 20:44:46,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:46,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1113981429, now seen corresponding path program 32 times [2022-04-06 20:44:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:46,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826658398] [2022-04-06 20:44:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:46,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:46,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826658398] [2022-04-06 20:44:46,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826658398] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385752909] [2022-04-06 20:44:46,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:46,292 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 20:44:46,293 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 20:44:46,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:46,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:44:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:46,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:46,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385752909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:46,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:46,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:44:46,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [55555579] [2022-04-06 20:44:46,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [55555579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:46,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:46,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:44:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374463056] [2022-04-06 20:44:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:46,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:44:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:44:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:44:46,781 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 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 20:44:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:47,030 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-04-06 20:44:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:44:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 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 49 [2022-04-06 20:44:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:47,031 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:44:47,031 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 20:44:47,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:44:47,032 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:47,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 34 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 20:44:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 20:44:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-04-06 20:44:47,036 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2022-04-06 20:44:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:47,036 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-04-06 20:44:47,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 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 20:44:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-04-06 20:44:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:44:47,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:47,037 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:47,061 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 20:44:47,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:47,248 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -146517870, now seen corresponding path program 33 times [2022-04-06 20:44:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:47,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712770393] [2022-04-06 20:44:47,250 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:47,250 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -146517870, now seen corresponding path program 34 times [2022-04-06 20:44:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:47,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344521796] [2022-04-06 20:44:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:47,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:47,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344521796] [2022-04-06 20:44:47,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344521796] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:47,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925163846] [2022-04-06 20:44:47,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:47,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:47,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:47,378 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 20:44:47,379 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 20:44:47,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:47,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:47,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:44:47,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:47,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:47,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925163846] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:47,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:47,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:44:47,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712770393] [2022-04-06 20:44:47,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712770393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:47,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:47,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:44:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690919850] [2022-04-06 20:44:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:47,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:44:47,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:44:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:44:47,842 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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 20:44:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:48,070 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-04-06 20:44:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:44:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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 51 [2022-04-06 20:44:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:48,072 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:44:48,072 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:44:48,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:44:48,073 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:48,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 44 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:44:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 20:44:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-04-06 20:44:48,077 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 51 [2022-04-06 20:44:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:48,078 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-04-06 20:44:48,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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 20:44:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-04-06 20:44:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:44:48,078 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:48,078 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:48,094 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 20:44:48,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:48,287 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash -305566737, now seen corresponding path program 35 times [2022-04-06 20:44:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474585719] [2022-04-06 20:44:48,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:48,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -305566737, now seen corresponding path program 36 times [2022-04-06 20:44:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:48,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251269588] [2022-04-06 20:44:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:48,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:48,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251269588] [2022-04-06 20:44:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251269588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567770423] [2022-04-06 20:44:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:48,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:48,484 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 20:44:48,514 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 20:44:48,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:48,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:44:48,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:44:48,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567770423] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:48,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:48,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 29 [2022-04-06 20:44:48,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474585719] [2022-04-06 20:44:48,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474585719] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:48,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:48,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:44:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521369338] [2022-04-06 20:44:48,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:48,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:44:48,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:44:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:44:48,737 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 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 20:44:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:49,011 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-04-06 20:44:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:44:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:44:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:49,012 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:44:49,012 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:44:49,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:44:49,013 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:49,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:44:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-06 20:44:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-04-06 20:44:49,016 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2022-04-06 20:44:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:49,017 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-04-06 20:44:49,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 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 20:44:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-04-06 20:44:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:44:49,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:49,017 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:49,033 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 20:44:49,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:49,227 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1467294732, now seen corresponding path program 37 times [2022-04-06 20:44:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1777668673] [2022-04-06 20:44:49,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:49,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1467294732, now seen corresponding path program 38 times [2022-04-06 20:44:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:49,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012402208] [2022-04-06 20:44:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:49,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:49,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:49,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012402208] [2022-04-06 20:44:49,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012402208] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:49,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330642465] [2022-04-06 20:44:49,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:49,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:49,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:49,473 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 20:44:49,474 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 20:44:49,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:49,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:44:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:50,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330642465] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:50,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:50,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:44:50,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1777668673] [2022-04-06 20:44:50,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1777668673] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:50,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:50,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:44:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700169784] [2022-04-06 20:44:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:50,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:44:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:44:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:44:50,042 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 20:44:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:50,304 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-04-06 20:44:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:44:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 55 [2022-04-06 20:44:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:50,305 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:44:50,305 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 20:44:50,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:44:50,306 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:50,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 44 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 20:44:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 20:44:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-04-06 20:44:50,309 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 55 [2022-04-06 20:44:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:50,310 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-04-06 20:44:50,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 20:44:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-04-06 20:44:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:44:50,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:50,310 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:50,326 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 20:44:50,526 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,SelfDestructingSolverStorable23 [2022-04-06 20:44:50,526 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:50,527 INFO L85 PathProgramCache]: Analyzing trace with hash 85149929, now seen corresponding path program 39 times [2022-04-06 20:44:50,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:50,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382036749] [2022-04-06 20:44:50,528 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:50,528 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 85149929, now seen corresponding path program 40 times [2022-04-06 20:44:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993290915] [2022-04-06 20:44:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:50,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:50,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:50,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993290915] [2022-04-06 20:44:50,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993290915] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:50,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11157954] [2022-04-06 20:44:50,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:50,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:50,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:50,780 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 20:44:50,781 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 20:44:50,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:50,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:50,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:44:50,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:50,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:51,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11157954] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:51,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:51,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:44:51,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:51,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382036749] [2022-04-06 20:44:51,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382036749] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:51,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:51,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:44:51,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070751706] [2022-04-06 20:44:51,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:51,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:44:51,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:44:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:44:51,484 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:51,794 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-04-06 20:44:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:44:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:44:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:51,795 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:44:51,795 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 20:44:51,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:44:51,797 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:51,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 20:44:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-04-06 20:44:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-04-06 20:44:51,800 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 57 [2022-04-06 20:44:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:51,800 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-04-06 20:44:51,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-04-06 20:44:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:44:51,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:51,801 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:51,818 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 20:44:52,001 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,SelfDestructingSolverStorable24 [2022-04-06 20:44:52,002 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:52,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1011111290, now seen corresponding path program 41 times [2022-04-06 20:44:52,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:52,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942039789] [2022-04-06 20:44:52,004 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:52,004 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1011111290, now seen corresponding path program 42 times [2022-04-06 20:44:52,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:52,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32501672] [2022-04-06 20:44:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:52,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:52,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:52,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32501672] [2022-04-06 20:44:52,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32501672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772426669] [2022-04-06 20:44:52,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:52,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:52,163 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 20:44:52,164 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 20:44:52,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:52,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:52,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:44:52,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:44:52,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772426669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:52,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:52,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2022-04-06 20:44:52,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:52,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942039789] [2022-04-06 20:44:52,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942039789] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:52,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:52,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:44:52,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993122031] [2022-04-06 20:44:52,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:52,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:44:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:44:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:44:52,344 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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 20:44:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:52,595 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-04-06 20:44:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:44:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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 59 [2022-04-06 20:44:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:52,596 INFO L225 Difference]: With dead ends: 78 [2022-04-06 20:44:52,596 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:44:52,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=927, Invalid=2043, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:44:52,597 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:52,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:44:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:44:52,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-06 20:44:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-04-06 20:44:52,611 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2022-04-06 20:44:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:52,612 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-04-06 20:44:52,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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 20:44:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-04-06 20:44:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:44:52,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:52,622 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:52,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:52,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:44:52,838 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2043812067, now seen corresponding path program 43 times [2022-04-06 20:44:52,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:52,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1430323152] [2022-04-06 20:44:52,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:52,840 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2043812067, now seen corresponding path program 44 times [2022-04-06 20:44:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:52,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518149083] [2022-04-06 20:44:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:53,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:53,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:53,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518149083] [2022-04-06 20:44:53,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518149083] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:53,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269968677] [2022-04-06 20:44:53,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:53,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:53,064 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 20:44:53,065 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 20:44:53,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:53,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:53,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:44:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:53,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:53,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269968677] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:53,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:53,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:44:53,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:53,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1430323152] [2022-04-06 20:44:53,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1430323152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:53,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:53,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:44:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730525118] [2022-04-06 20:44:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:53,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:44:53,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:44:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:44:53,902 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 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 20:44:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:54,233 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-04-06 20:44:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:44:54,234 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 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 61 [2022-04-06 20:44:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:54,234 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:44:54,234 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:44:54,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:44:54,236 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:54,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:44:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 20:44:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-04-06 20:44:54,239 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 61 [2022-04-06 20:44:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:54,240 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-04-06 20:44:54,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 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 20:44:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-04-06 20:44:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:44:54,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:54,240 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:54,257 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 20:44:54,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:54,443 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash 67527680, now seen corresponding path program 45 times [2022-04-06 20:44:54,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:54,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2058163158] [2022-04-06 20:44:54,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:54,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash 67527680, now seen corresponding path program 46 times [2022-04-06 20:44:54,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:54,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798343202] [2022-04-06 20:44:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:54,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:54,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798343202] [2022-04-06 20:44:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798343202] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990622233] [2022-04-06 20:44:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:54,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:54,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:54,660 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 20:44:54,661 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 20:44:54,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:54,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:44:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:54,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:55,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990622233] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:55,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:55,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:44:55,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:55,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2058163158] [2022-04-06 20:44:55,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2058163158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:55,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:55,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:44:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871611859] [2022-04-06 20:44:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:55,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:44:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:44:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:44:55,262 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 20:44:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:55,529 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-04-06 20:44:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:44:55,530 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 63 [2022-04-06 20:44:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:55,530 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:44:55,530 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 20:44:55,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:44:55,532 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:55,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 20:44:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-04-06 20:44:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-04-06 20:44:55,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 63 [2022-04-06 20:44:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:55,535 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-04-06 20:44:55,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 20:44:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-04-06 20:44:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:44:55,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:55,536 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:55,552 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 20:44:55,747 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,SelfDestructingSolverStorable27 [2022-04-06 20:44:55,747 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -766223395, now seen corresponding path program 47 times [2022-04-06 20:44:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:55,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212972692] [2022-04-06 20:44:55,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:55,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:55,749 INFO L85 PathProgramCache]: Analyzing trace with hash -766223395, now seen corresponding path program 48 times [2022-04-06 20:44:55,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:55,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363038859] [2022-04-06 20:44:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:55,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:55,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:55,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363038859] [2022-04-06 20:44:55,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363038859] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058991381] [2022-04-06 20:44:55,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:55,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:55,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:55,989 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 20:44:56,006 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 20:44:56,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:56,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:44:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:44:56,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:44:56,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058991381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:56,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:56,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5, 5] total 35 [2022-04-06 20:44:56,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:56,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212972692] [2022-04-06 20:44:56,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212972692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:56,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:56,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:44:56,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113636400] [2022-04-06 20:44:56,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:56,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:44:56,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:56,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:44:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=783, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:44:56,279 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 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 20:44:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:56,654 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-04-06 20:44:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:44:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:44:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:56,655 INFO L225 Difference]: With dead ends: 84 [2022-04-06 20:44:56,655 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:44:56,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1161, Invalid=2499, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:44:56,656 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:56,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:44:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 20:44:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-04-06 20:44:56,670 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 65 [2022-04-06 20:44:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:56,671 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-04-06 20:44:56,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 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 20:44:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-04-06 20:44:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:44:56,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:56,671 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:56,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:56,887 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,SelfDestructingSolverStorable28 [2022-04-06 20:44:56,887 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1157877882, now seen corresponding path program 49 times [2022-04-06 20:44:56,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:56,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2147433965] [2022-04-06 20:44:56,889 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:56,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:56,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1157877882, now seen corresponding path program 50 times [2022-04-06 20:44:56,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:56,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827090755] [2022-04-06 20:44:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:56,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:57,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:57,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:57,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827090755] [2022-04-06 20:44:57,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827090755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:57,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794577064] [2022-04-06 20:44:57,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:57,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:57,199 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 20:44:57,200 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 20:44:57,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:44:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:57,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:58,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794577064] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:58,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:58,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:44:58,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:58,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2147433965] [2022-04-06 20:44:58,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2147433965] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:58,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:58,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:44:58,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323690278] [2022-04-06 20:44:58,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:58,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:44:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:44:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:44:58,076 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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 20:44:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:58,420 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-04-06 20:44:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:44:58,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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 67 [2022-04-06 20:44:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:58,426 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:44:58,426 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:44:58,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:44:58,428 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:58,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 44 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:44:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 20:44:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:44:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-04-06 20:44:58,432 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 67 [2022-04-06 20:44:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:58,433 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-04-06 20:44:58,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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 20:44:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-04-06 20:44:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:44:58,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:58,434 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:58,450 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 20:44:58,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:58,650 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:58,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:58,650 INFO L85 PathProgramCache]: Analyzing trace with hash -911699497, now seen corresponding path program 51 times [2022-04-06 20:44:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:58,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052650952] [2022-04-06 20:44:58,652 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:58,652 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -911699497, now seen corresponding path program 52 times [2022-04-06 20:44:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742231727] [2022-04-06 20:44:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:58,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742231727] [2022-04-06 20:44:58,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742231727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386000189] [2022-04-06 20:44:58,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:58,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:58,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:58,996 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 20:44:58,997 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 20:44:59,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:59,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:44:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:59,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386000189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:59,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:59,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:44:59,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:59,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052650952] [2022-04-06 20:44:59,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052650952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:59,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:59,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:44:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63510479] [2022-04-06 20:44:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:59,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:44:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:44:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:44:59,733 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:00,032 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-04-06 20:45:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:45:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:45:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:00,033 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:45:00,033 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 20:45:00,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:45:00,035 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:00,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 29 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 20:45:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-04-06 20:45:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-04-06 20:45:00,039 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 69 [2022-04-06 20:45:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:00,040 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-04-06 20:45:00,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-04-06 20:45:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:45:00,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:00,040 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:00,057 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 20:45:00,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:00,245 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1205702668, now seen corresponding path program 53 times [2022-04-06 20:45:00,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:00,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103214115] [2022-04-06 20:45:00,246 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:00,247 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1205702668, now seen corresponding path program 54 times [2022-04-06 20:45:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560053770] [2022-04-06 20:45:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:00,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:00,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:00,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560053770] [2022-04-06 20:45:00,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560053770] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:00,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483504527] [2022-04-06 20:45:00,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:00,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:00,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:00,674 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 20:45:00,675 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 20:45:00,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:00,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:00,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:45:00,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:45:00,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483504527] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:00,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:00,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 5, 5] total 38 [2022-04-06 20:45:00,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103214115] [2022-04-06 20:45:00,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103214115] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:00,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:00,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:45:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539746119] [2022-04-06 20:45:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:00,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:45:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:45:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=912, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:45:00,983 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 20:45:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:01,471 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-04-06 20:45:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:45:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 71 [2022-04-06 20:45:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:01,472 INFO L225 Difference]: With dead ends: 90 [2022-04-06 20:45:01,472 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:45:01,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1422, Invalid=3000, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:45:01,473 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:01,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:45:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-04-06 20:45:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-04-06 20:45:01,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 71 [2022-04-06 20:45:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:01,476 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-04-06 20:45:01,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 20:45:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-04-06 20:45:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:45:01,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:01,477 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:01,493 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 20:45:01,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:01,693 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:01,693 INFO L85 PathProgramCache]: Analyzing trace with hash -274908463, now seen corresponding path program 55 times [2022-04-06 20:45:01,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:01,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1448110978] [2022-04-06 20:45:01,694 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:01,695 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash -274908463, now seen corresponding path program 56 times [2022-04-06 20:45:01,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:01,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619006751] [2022-04-06 20:45:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:01,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:01,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619006751] [2022-04-06 20:45:01,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619006751] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254741991] [2022-04-06 20:45:01,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:01,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:01,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:01,927 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 20:45:01,928 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 20:45:01,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:01,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:01,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:45:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:02,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:02,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254741991] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:02,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:03,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:45:03,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:03,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1448110978] [2022-04-06 20:45:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1448110978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:03,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:03,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:45:03,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374270363] [2022-04-06 20:45:03,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:03,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:45:03,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:03,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:45:03,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:45:03,002 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 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 20:45:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:03,470 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-04-06 20:45:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:45:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 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 73 [2022-04-06 20:45:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:03,472 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:45:03,472 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 20:45:03,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:45:03,489 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:03,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 20:45:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-06 20:45:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-04-06 20:45:03,500 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2022-04-06 20:45:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:03,500 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-04-06 20:45:03,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 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 20:45:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-04-06 20:45:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:45:03,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:03,501 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:03,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:03,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:03,717 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:03,717 INFO L85 PathProgramCache]: Analyzing trace with hash 865124974, now seen corresponding path program 57 times [2022-04-06 20:45:03,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:03,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [146364067] [2022-04-06 20:45:03,719 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:03,719 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash 865124974, now seen corresponding path program 58 times [2022-04-06 20:45:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517452460] [2022-04-06 20:45:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:03,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:04,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:04,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517452460] [2022-04-06 20:45:04,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517452460] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:04,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141611500] [2022-04-06 20:45:04,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:04,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:04,095 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 20:45:04,103 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 20:45:04,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:04,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:45:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:04,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:04,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141611500] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:04,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:04,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:45:04,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:04,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [146364067] [2022-04-06 20:45:04,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [146364067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:04,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:04,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:45:04,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897668974] [2022-04-06 20:45:04,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:04,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:45:04,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:45:04,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:45:04,872 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 20:45:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:05,386 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-04-06 20:45:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:45:05,387 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 75 [2022-04-06 20:45:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:05,387 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:45:05,387 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 20:45:05,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:45:05,388 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:05,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 44 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 20:45:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 20:45:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-04-06 20:45:05,392 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 75 [2022-04-06 20:45:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:05,392 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-04-06 20:45:05,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 20:45:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-04-06 20:45:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:45:05,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:05,392 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:05,410 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 20:45:05,593 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,SelfDestructingSolverStorable33 [2022-04-06 20:45:05,593 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1220597451, now seen corresponding path program 59 times [2022-04-06 20:45:05,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:05,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368534310] [2022-04-06 20:45:05,595 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:05,595 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1220597451, now seen corresponding path program 60 times [2022-04-06 20:45:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:05,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493112472] [2022-04-06 20:45:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:06,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:06,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493112472] [2022-04-06 20:45:06,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493112472] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:06,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772080815] [2022-04-06 20:45:06,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:06,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:06,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:06,011 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 20:45:06,012 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 20:45:06,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:06,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:45:06,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:45:06,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772080815] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:06,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:06,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 5, 5] total 41 [2022-04-06 20:45:06,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368534310] [2022-04-06 20:45:06,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368534310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:06,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:06,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:45:06,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24297576] [2022-04-06 20:45:06,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:06,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:45:06,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:45:06,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1050, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:45:06,346 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 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 20:45:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:06,905 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-04-06 20:45:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:45:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 20:45:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:06,906 INFO L225 Difference]: With dead ends: 96 [2022-04-06 20:45:06,906 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 20:45:06,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1710, Invalid=3546, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:45:06,907 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:06,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 20:45:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-04-06 20:45:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-04-06 20:45:06,910 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 77 [2022-04-06 20:45:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:06,911 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-04-06 20:45:06,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 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 20:45:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-04-06 20:45:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:45:06,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:06,911 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:06,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:07,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:07,119 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash -767735832, now seen corresponding path program 61 times [2022-04-06 20:45:07,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:07,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6018209] [2022-04-06 20:45:07,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:07,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash -767735832, now seen corresponding path program 62 times [2022-04-06 20:45:07,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:07,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789573002] [2022-04-06 20:45:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:07,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789573002] [2022-04-06 20:45:07,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789573002] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209005459] [2022-04-06 20:45:07,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:07,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:07,531 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 20:45:07,532 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 20:45:07,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:07,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:07,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:45:07,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:07,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209005459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:08,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:08,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:45:08,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:08,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6018209] [2022-04-06 20:45:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6018209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:08,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:08,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:45:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181969207] [2022-04-06 20:45:08,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:08,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:45:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:45:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:45:08,538 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 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 20:45:08,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:08,958 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-04-06 20:45:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:45:08,959 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 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 79 [2022-04-06 20:45:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:08,959 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:45:08,959 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 20:45:08,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:45:08,961 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:08,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 34 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 20:45:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-06 20:45:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-04-06 20:45:08,972 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2022-04-06 20:45:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:08,972 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-04-06 20:45:08,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 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 20:45:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-04-06 20:45:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:45:08,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:08,973 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:08,988 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 20:45:09,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:09,188 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash -295574075, now seen corresponding path program 63 times [2022-04-06 20:45:09,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126679832] [2022-04-06 20:45:09,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:09,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash -295574075, now seen corresponding path program 64 times [2022-04-06 20:45:09,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:09,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786702526] [2022-04-06 20:45:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:09,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:09,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786702526] [2022-04-06 20:45:09,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786702526] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196762761] [2022-04-06 20:45:09,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:09,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:09,672 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 20:45:09,673 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 20:45:09,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:45:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:09,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:10,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196762761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:10,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:10,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:45:10,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126679832] [2022-04-06 20:45:10,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126679832] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:10,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:10,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:45:10,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984901730] [2022-04-06 20:45:10,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:10,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:45:10,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:45:10,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:45:10,547 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:10,905 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-04-06 20:45:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:45:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 20:45:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:10,906 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:45:10,906 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:45:10,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:45:10,908 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:10,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:45:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-04-06 20:45:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-04-06 20:45:10,916 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 81 [2022-04-06 20:45:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:10,916 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-04-06 20:45:10,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-04-06 20:45:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:45:10,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:10,917 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:10,932 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 20:45:11,131 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,SelfDestructingSolverStorable36 [2022-04-06 20:45:11,131 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1814658974, now seen corresponding path program 65 times [2022-04-06 20:45:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:11,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1805026489] [2022-04-06 20:45:11,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:11,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:11,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1814658974, now seen corresponding path program 66 times [2022-04-06 20:45:11,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:11,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231432039] [2022-04-06 20:45:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:11,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:11,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:11,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:11,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231432039] [2022-04-06 20:45:11,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231432039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:11,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478641038] [2022-04-06 20:45:11,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:11,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:11,480 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 20:45:11,481 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 20:45:11,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:11,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:45:11,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:45:11,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478641038] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:11,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:11,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 5, 5] total 44 [2022-04-06 20:45:11,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1805026489] [2022-04-06 20:45:11,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1805026489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:11,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:11,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:45:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28568730] [2022-04-06 20:45:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:11,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:45:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:45:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:45:11,832 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 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 20:45:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:12,426 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-04-06 20:45:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:45:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 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 83 [2022-04-06 20:45:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:12,427 INFO L225 Difference]: With dead ends: 102 [2022-04-06 20:45:12,427 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 20:45:12,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2025, Invalid=4137, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:45:12,427 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:12,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 34 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 20:45:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-04-06 20:45:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-04-06 20:45:12,431 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 83 [2022-04-06 20:45:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:12,431 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-04-06 20:45:12,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 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 20:45:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-04-06 20:45:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:45:12,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:12,432 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:12,448 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 20:45:12,642 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,SelfDestructingSolverStorable37 [2022-04-06 20:45:12,642 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1366366273, now seen corresponding path program 67 times [2022-04-06 20:45:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:12,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130399501] [2022-04-06 20:45:12,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:12,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1366366273, now seen corresponding path program 68 times [2022-04-06 20:45:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:12,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089849248] [2022-04-06 20:45:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:12,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089849248] [2022-04-06 20:45:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089849248] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826421740] [2022-04-06 20:45:13,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:13,122 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 20:45:13,123 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 20:45:13,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:45:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:13,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:14,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826421740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:14,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:14,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:45:14,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130399501] [2022-04-06 20:45:14,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130399501] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:14,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:14,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:45:14,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823269885] [2022-04-06 20:45:14,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:14,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:45:14,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:45:14,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:45:14,207 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 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 20:45:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:14,719 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2022-04-06 20:45:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:45:14,720 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 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 85 [2022-04-06 20:45:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:14,722 INFO L225 Difference]: With dead ends: 104 [2022-04-06 20:45:14,722 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 20:45:14,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:45:14,723 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:14,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 54 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 20:45:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-06 20:45:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-04-06 20:45:14,730 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 85 [2022-04-06 20:45:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:14,730 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-04-06 20:45:14,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 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 20:45:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-04-06 20:45:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:45:14,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:14,730 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:14,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:14,943 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,SelfDestructingSolverStorable38 [2022-04-06 20:45:14,943 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash -53810212, now seen corresponding path program 69 times [2022-04-06 20:45:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1540329601] [2022-04-06 20:45:14,945 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:14,945 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash -53810212, now seen corresponding path program 70 times [2022-04-06 20:45:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:14,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232886433] [2022-04-06 20:45:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:14,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:15,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232886433] [2022-04-06 20:45:15,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232886433] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316648259] [2022-04-06 20:45:15,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:15,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:15,456 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 20:45:15,482 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 20:45:15,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:15,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:45:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:15,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:16,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316648259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:16,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:16,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:45:16,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:16,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1540329601] [2022-04-06 20:45:16,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1540329601] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:16,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:16,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:45:16,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397637198] [2022-04-06 20:45:16,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:16,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:45:16,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:45:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:45:16,938 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 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 20:45:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:17,500 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-04-06 20:45:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:45:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 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 87 [2022-04-06 20:45:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:17,501 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:45:17,501 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 20:45:17,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:45:17,503 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:17,503 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:17,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 20:45:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 20:45:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-04-06 20:45:17,507 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 87 [2022-04-06 20:45:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:17,507 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-04-06 20:45:17,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 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 20:45:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-04-06 20:45:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:45:17,508 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:17,508 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:17,524 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 20:45:17,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:45:17,713 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1407820615, now seen corresponding path program 71 times [2022-04-06 20:45:17,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:17,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [516216089] [2022-04-06 20:45:17,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:17,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1407820615, now seen corresponding path program 72 times [2022-04-06 20:45:17,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:17,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669705023] [2022-04-06 20:45:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:17,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:18,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669705023] [2022-04-06 20:45:18,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669705023] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103859197] [2022-04-06 20:45:18,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:18,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:18,279 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 20:45:18,280 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 20:45:18,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:18,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:45:18,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:45:18,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103859197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:18,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:18,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 5, 5] total 47 [2022-04-06 20:45:18,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:18,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [516216089] [2022-04-06 20:45:18,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [516216089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:18,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:18,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:45:18,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703413776] [2022-04-06 20:45:18,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:18,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:45:18,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:18,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:45:18,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=1353, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:45:18,511 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 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 20:45:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:19,232 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-04-06 20:45:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:45:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 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 20:45:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:19,233 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:45:19,233 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 20:45:19,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2367, Invalid=4773, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:45:19,235 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:19,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 54 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 20:45:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-04-06 20:45:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-04-06 20:45:19,238 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 89 [2022-04-06 20:45:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:19,239 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-04-06 20:45:19,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 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 20:45:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-04-06 20:45:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:45:19,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:19,239 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:19,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:19,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,447 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1236727210, now seen corresponding path program 73 times [2022-04-06 20:45:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:19,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026552714] [2022-04-06 20:45:19,449 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:19,449 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1236727210, now seen corresponding path program 74 times [2022-04-06 20:45:19,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:19,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196034663] [2022-04-06 20:45:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:19,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:19,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:19,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196034663] [2022-04-06 20:45:19,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196034663] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:19,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397194599] [2022-04-06 20:45:19,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:19,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:19,995 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 20:45:20,010 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 20:45:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:45:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:20,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397194599] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:21,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:21,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:45:21,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026552714] [2022-04-06 20:45:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026552714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:21,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:21,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:45:21,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265766583] [2022-04-06 20:45:21,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:21,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:45:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:45:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:45:21,758 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 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 20:45:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:22,284 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-04-06 20:45:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:45:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 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 91 [2022-04-06 20:45:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:22,285 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:45:22,285 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 20:45:22,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:45:22,287 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:22,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 20:45:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-04-06 20:45:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-04-06 20:45:22,290 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2022-04-06 20:45:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:22,291 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-04-06 20:45:22,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 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 20:45:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-04-06 20:45:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:45:22,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:22,291 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:22,311 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 20:45:22,499 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,SelfDestructingSolverStorable41 [2022-04-06 20:45:22,499 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -24722253, now seen corresponding path program 75 times [2022-04-06 20:45:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:22,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980373262] [2022-04-06 20:45:22,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:22,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash -24722253, now seen corresponding path program 76 times [2022-04-06 20:45:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:22,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699337692] [2022-04-06 20:45:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:23,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:23,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699337692] [2022-04-06 20:45:23,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699337692] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:23,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507203818] [2022-04-06 20:45:23,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:23,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:23,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:23,069 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 20:45:23,070 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 20:45:23,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:45:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:23,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507203818] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:24,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:24,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:45:24,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:24,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980373262] [2022-04-06 20:45:24,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980373262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:24,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:24,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:45:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964241874] [2022-04-06 20:45:24,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:24,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:45:24,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:45:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:45:24,735 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 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 20:45:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:25,276 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-04-06 20:45:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:45:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 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 93 [2022-04-06 20:45:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:25,277 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:45:25,277 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 20:45:25,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:45:25,279 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:25,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 20:45:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-04-06 20:45:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-04-06 20:45:25,283 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 93 [2022-04-06 20:45:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:25,283 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-04-06 20:45:25,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 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 20:45:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-04-06 20:45:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:45:25,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:25,284 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:25,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:25,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 20:45:25,499 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash 775904208, now seen corresponding path program 77 times [2022-04-06 20:45:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:25,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214157481] [2022-04-06 20:45:25,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:25,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash 775904208, now seen corresponding path program 78 times [2022-04-06 20:45:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98908313] [2022-04-06 20:45:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:25,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:26,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:26,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98908313] [2022-04-06 20:45:26,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98908313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:26,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140249865] [2022-04-06 20:45:26,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:26,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:26,091 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 20:45:26,103 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 20:45:26,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:26,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:26,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:45:26,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:45:26,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140249865] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:26,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:26,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 5, 5] total 50 [2022-04-06 20:45:26,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:26,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214157481] [2022-04-06 20:45:26,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214157481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:26,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:26,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:45:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933554671] [2022-04-06 20:45:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:26,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:45:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:45:26,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1518, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:45:26,474 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 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 20:45:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:27,301 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-04-06 20:45:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:45:27,301 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 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 95 [2022-04-06 20:45:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:27,302 INFO L225 Difference]: With dead ends: 114 [2022-04-06 20:45:27,302 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 20:45:27,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2736, Invalid=5454, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:45:27,303 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:27,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 49 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 20:45:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-04-06 20:45:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-04-06 20:45:27,307 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 95 [2022-04-06 20:45:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:27,307 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-04-06 20:45:27,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 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 20:45:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-04-06 20:45:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:45:27,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:27,308 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:27,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:27,523 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,SelfDestructingSolverStorable43 [2022-04-06 20:45:27,523 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1378787245, now seen corresponding path program 79 times [2022-04-06 20:45:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:27,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775185711] [2022-04-06 20:45:27,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:27,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1378787245, now seen corresponding path program 80 times [2022-04-06 20:45:27,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:27,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522171877] [2022-04-06 20:45:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:28,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:28,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522171877] [2022-04-06 20:45:28,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522171877] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215559703] [2022-04-06 20:45:28,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:28,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:28,152 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 20:45:28,153 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 20:45:28,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:28,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:45:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:28,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:30,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215559703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:30,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:30,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 20:45:30,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:30,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775185711] [2022-04-06 20:45:30,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775185711] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:30,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:30,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:45:30,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762464649] [2022-04-06 20:45:30,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:30,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:45:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:45:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:45:30,034 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 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 20:45:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:30,848 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2022-04-06 20:45:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:45:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 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 97 [2022-04-06 20:45:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:30,849 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:45:30,849 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 20:45:30,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:45:30,851 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:30,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 39 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 20:45:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 20:45:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-04-06 20:45:30,855 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 97 [2022-04-06 20:45:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:30,855 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-04-06 20:45:30,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 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 20:45:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-04-06 20:45:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:45:30,856 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:30,856 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:30,877 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 20:45:31,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:31,067 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash 928800842, now seen corresponding path program 81 times [2022-04-06 20:45:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983333296] [2022-04-06 20:45:31,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:31,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash 928800842, now seen corresponding path program 82 times [2022-04-06 20:45:31,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:31,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863248123] [2022-04-06 20:45:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:31,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:31,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:31,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863248123] [2022-04-06 20:45:31,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863248123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:31,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748236405] [2022-04-06 20:45:31,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:31,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:31,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:31,722 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 20:45:31,747 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 20:45:31,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:45:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:31,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:33,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748236405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:33,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:33,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 20:45:33,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983333296] [2022-04-06 20:45:33,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983333296] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:33,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:33,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:45:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64810901] [2022-04-06 20:45:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:33,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:45:33,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:45:33,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:45:33,731 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 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 20:45:34,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:34,548 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-04-06 20:45:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:45:34,548 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 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 99 [2022-04-06 20:45:34,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:34,549 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:45:34,549 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 20:45:34,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:45:34,551 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:34,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 34 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 20:45:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-04-06 20:45:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-04-06 20:45:34,555 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 99 [2022-04-06 20:45:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:34,555 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-04-06 20:45:34,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 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 20:45:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-04-06 20:45:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:45:34,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:34,556 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:34,585 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 20:45:34,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:34,772 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2011402841, now seen corresponding path program 83 times [2022-04-06 20:45:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:34,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919075468] [2022-04-06 20:45:34,777 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:34,777 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2011402841, now seen corresponding path program 84 times [2022-04-06 20:45:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:34,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031800877] [2022-04-06 20:45:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:35,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:35,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031800877] [2022-04-06 20:45:35,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031800877] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:35,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138380905] [2022-04-06 20:45:35,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:35,439 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 20:45:35,479 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 20:45:35,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:35,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:35,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:45:35,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:45:35,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138380905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:35,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:35,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 5, 5] total 53 [2022-04-06 20:45:35,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:35,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919075468] [2022-04-06 20:45:35,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919075468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:35,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:35,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:45:35,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129742730] [2022-04-06 20:45:35,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:35,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:45:35,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:45:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=1692, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:45:35,832 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 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 20:45:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:36,709 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-04-06 20:45:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:45:36,710 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 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 101 [2022-04-06 20:45:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:36,711 INFO L225 Difference]: With dead ends: 120 [2022-04-06 20:45:36,711 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:45:36,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3132, Invalid=6180, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:45:36,712 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:36,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 54 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:45:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-04-06 20:45:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 100 states have (on average 1.04) internal successors, (104), 101 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-04-06 20:45:36,716 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 101 [2022-04-06 20:45:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:36,716 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-04-06 20:45:36,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 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 20:45:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-04-06 20:45:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:45:36,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:36,717 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:36,733 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 20:45:36,927 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,SelfDestructingSolverStorable46 [2022-04-06 20:45:36,927 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1458661436, now seen corresponding path program 85 times [2022-04-06 20:45:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:36,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925143708] [2022-04-06 20:45:36,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:36,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1458661436, now seen corresponding path program 86 times [2022-04-06 20:45:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:36,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238728366] [2022-04-06 20:45:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:37,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:37,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238728366] [2022-04-06 20:45:37,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238728366] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018179971] [2022-04-06 20:45:37,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:37,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:37,624 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 20:45:37,624 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 20:45:37,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:37,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:45:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:37,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:39,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018179971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:39,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:39,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 20:45:39,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:39,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925143708] [2022-04-06 20:45:39,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925143708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:39,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:39,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:45:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357056648] [2022-04-06 20:45:39,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:39,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:45:39,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:45:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:45:39,518 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 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 20:45:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:40,126 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-04-06 20:45:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:45:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 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 103 [2022-04-06 20:45:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:40,127 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:45:40,127 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 20:45:40,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:45:40,128 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:40,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 39 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 20:45:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-04-06 20:45:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-04-06 20:45:40,133 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 103 [2022-04-06 20:45:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:40,134 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-04-06 20:45:40,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 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 20:45:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-04-06 20:45:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:45:40,134 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:40,134 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:40,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:40,350 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,SelfDestructingSolverStorable47 [2022-04-06 20:45:40,350 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1444851361, now seen corresponding path program 87 times [2022-04-06 20:45:40,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:40,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443901794] [2022-04-06 20:45:40,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:40,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1444851361, now seen corresponding path program 88 times [2022-04-06 20:45:40,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:40,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438042311] [2022-04-06 20:45:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:40,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:40,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:40,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438042311] [2022-04-06 20:45:40,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438042311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45957130] [2022-04-06 20:45:40,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:40,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:40,806 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 20:45:40,808 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 20:45:40,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:40,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:45:40,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:40,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:42,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45957130] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:42,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:42,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 20:45:42,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443901794] [2022-04-06 20:45:42,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443901794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:42,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:42,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:45:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484360398] [2022-04-06 20:45:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:42,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:45:42,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:45:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:45:42,212 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 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 20:45:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:42,822 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-04-06 20:45:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:45:42,822 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 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 105 [2022-04-06 20:45:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:42,823 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:45:42,823 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 20:45:42,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:45:42,825 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:42,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 44 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 20:45:42,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-04-06 20:45:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-04-06 20:45:42,852 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 105 [2022-04-06 20:45:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:42,852 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-04-06 20:45:42,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 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 20:45:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-04-06 20:45:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:45:42,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:42,853 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:42,881 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 20:45:43,068 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,SelfDestructingSolverStorable48 [2022-04-06 20:45:43,069 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash -8093122, now seen corresponding path program 89 times [2022-04-06 20:45:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:43,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19884910] [2022-04-06 20:45:43,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:43,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:43,071 INFO L85 PathProgramCache]: Analyzing trace with hash -8093122, now seen corresponding path program 90 times [2022-04-06 20:45:43,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:43,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633155755] [2022-04-06 20:45:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:43,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:43,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:43,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633155755] [2022-04-06 20:45:43,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633155755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180641272] [2022-04-06 20:45:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:43,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:43,797 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 20:45:43,798 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 20:45:43,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:45:44,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:45:44,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180641272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:44,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:44,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2022-04-06 20:45:44,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:44,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19884910] [2022-04-06 20:45:44,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19884910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:44,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:44,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:45:44,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956480548] [2022-04-06 20:45:44,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:44,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:45:44,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:45:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1875, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:45:44,217 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 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 20:45:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:45,089 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-04-06 20:45:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:45:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 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 107 [2022-04-06 20:45:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:45,090 INFO L225 Difference]: With dead ends: 126 [2022-04-06 20:45:45,090 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 20:45:45,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3555, Invalid=6951, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:45:45,091 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:45,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 34 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 20:45:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-04-06 20:45:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-04-06 20:45:45,096 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 107 [2022-04-06 20:45:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:45,097 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-04-06 20:45:45,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 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 20:45:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-04-06 20:45:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:45:45,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:45,097 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:45,115 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 20:45:45,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:45,313 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash -423370085, now seen corresponding path program 91 times [2022-04-06 20:45:45,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:45,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1653172388] [2022-04-06 20:45:45,315 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:45,315 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash -423370085, now seen corresponding path program 92 times [2022-04-06 20:45:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:45,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860776217] [2022-04-06 20:45:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:45,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:46,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:46,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:46,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860776217] [2022-04-06 20:45:46,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860776217] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:46,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875332700] [2022-04-06 20:45:46,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:46,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:46,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:46,129 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 20:45:46,130 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 20:45:46,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:46,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:46,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:45:46,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:46,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:48,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875332700] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:48,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:48,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 20:45:48,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1653172388] [2022-04-06 20:45:48,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1653172388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:48,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:48,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:45:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900802191] [2022-04-06 20:45:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:48,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:45:48,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:48,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:45:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:45:48,572 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 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 20:45:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:49,549 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-04-06 20:45:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:45:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 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 109 [2022-04-06 20:45:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:49,550 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:45:49,550 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 20:45:49,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:45:49,552 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:49,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 44 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 20:45:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-06 20:45:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 108 states have (on average 1.037037037037037) internal successors, (112), 109 states have internal predecessors, (112), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-04-06 20:45:49,556 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 109 [2022-04-06 20:45:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:49,556 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-04-06 20:45:49,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 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 20:45:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-04-06 20:45:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:45:49,557 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:49,557 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:49,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:49,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:49,758 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:49,758 INFO L85 PathProgramCache]: Analyzing trace with hash -72573000, now seen corresponding path program 93 times [2022-04-06 20:45:49,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:49,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929087400] [2022-04-06 20:45:49,759 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:49,759 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -72573000, now seen corresponding path program 94 times [2022-04-06 20:45:49,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:49,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314834303] [2022-04-06 20:45:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:49,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:50,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314834303] [2022-04-06 20:45:50,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314834303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145675290] [2022-04-06 20:45:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:50,572 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 20:45:50,572 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 20:45:50,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:50,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:45:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:50,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:52,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145675290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:52,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:52,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 20:45:52,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:52,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929087400] [2022-04-06 20:45:52,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929087400] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:52,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:52,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:45:52,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906850573] [2022-04-06 20:45:52,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:52,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:45:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:45:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:45:52,924 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 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 20:45:53,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:53,768 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-04-06 20:45:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:45:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 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 111 [2022-04-06 20:45:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:53,772 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:45:53,772 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 20:45:53,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:45:53,777 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:53,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 20:45:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-04-06 20:45:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 111 states have internal predecessors, (114), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-04-06 20:45:53,783 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 111 [2022-04-06 20:45:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:53,783 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-04-06 20:45:53,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 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 20:45:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-04-06 20:45:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:45:53,783 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:53,784 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:53,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:53,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:53,999 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2035976597, now seen corresponding path program 95 times [2022-04-06 20:45:54,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [812958571] [2022-04-06 20:45:54,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:54,001 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2035976597, now seen corresponding path program 96 times [2022-04-06 20:45:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:54,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393967740] [2022-04-06 20:45:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:54,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:54,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393967740] [2022-04-06 20:45:54,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393967740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354309230] [2022-04-06 20:45:54,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:54,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:54,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:54,861 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 20:45:54,862 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 20:45:54,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:54,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:54,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:45:55,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:45:55,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354309230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:55,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:55,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 5, 5] total 59 [2022-04-06 20:45:55,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:55,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [812958571] [2022-04-06 20:45:55,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [812958571] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:55,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:55,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:45:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958869246] [2022-04-06 20:45:55,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:55,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:45:55,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:45:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=2067, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:45:55,314 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 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 20:45:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:56,359 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2022-04-06 20:45:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:45:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 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 113 [2022-04-06 20:45:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:56,360 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:45:56,360 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:45:56,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4005, Invalid=7767, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:45:56,361 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:56,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 29 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:45:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-04-06 20:45:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 113 states have internal predecessors, (116), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:45:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-04-06 20:45:56,366 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 113 [2022-04-06 20:45:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:56,367 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-04-06 20:45:56,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 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 20:45:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-04-06 20:45:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:45:56,367 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:56,367 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:56,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:56,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 20:45:56,579 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1127575602, now seen corresponding path program 97 times [2022-04-06 20:45:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:56,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212739255] [2022-04-06 20:45:56,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:56,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:56,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1127575602, now seen corresponding path program 98 times [2022-04-06 20:45:56,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:56,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140993867] [2022-04-06 20:45:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:57,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:57,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:57,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140993867] [2022-04-06 20:45:57,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140993867] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498371012] [2022-04-06 20:45:57,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:57,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:57,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:57,491 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 20:45:57,492 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 20:45:57,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:45:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:57,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:59,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498371012] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:59,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:59,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 20:45:59,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212739255] [2022-04-06 20:45:59,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212739255] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:59,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:59,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:45:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168665275] [2022-04-06 20:45:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:59,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:45:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:45:59,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:45:59,864 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 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 20:46:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:00,978 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-04-06 20:46:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:46:00,978 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 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 115 [2022-04-06 20:46:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:00,979 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:46:00,979 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 20:46:00,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:46:00,980 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:00,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 20:46:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-04-06 20:46:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 115 states have internal predecessors, (118), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-04-06 20:46:00,985 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 115 [2022-04-06 20:46:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:00,985 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-04-06 20:46:00,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 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 20:46:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-04-06 20:46:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:46:00,985 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:00,986 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:01,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:01,186 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,SelfDestructingSolverStorable53 [2022-04-06 20:46:01,186 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:01,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash 32580495, now seen corresponding path program 99 times [2022-04-06 20:46:01,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:01,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718982196] [2022-04-06 20:46:01,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:01,188 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 32580495, now seen corresponding path program 100 times [2022-04-06 20:46:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713225592] [2022-04-06 20:46:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:01,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:02,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713225592] [2022-04-06 20:46:02,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713225592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:02,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766075676] [2022-04-06 20:46:02,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:02,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:02,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:02,052 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 20:46:02,053 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 20:46:02,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:02,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:02,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:46:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:02,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:04,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766075676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:04,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:04,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 20:46:04,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718982196] [2022-04-06 20:46:04,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718982196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:04,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:04,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:46:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133915096] [2022-04-06 20:46:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:04,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:46:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:46:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:46:04,711 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 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 20:46:05,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:05,459 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2022-04-06 20:46:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:46:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 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 117 [2022-04-06 20:46:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:05,460 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:46:05,460 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 20:46:05,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:46:05,461 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:05,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 20:46:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-04-06 20:46:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 117 states have internal predecessors, (120), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-04-06 20:46:05,466 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 117 [2022-04-06 20:46:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:05,466 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-04-06 20:46:05,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 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 20:46:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-04-06 20:46:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:46:05,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:05,467 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:05,490 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 20:46:05,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:05,679 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash 9270188, now seen corresponding path program 101 times [2022-04-06 20:46:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [463546255] [2022-04-06 20:46:05,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:05,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash 9270188, now seen corresponding path program 102 times [2022-04-06 20:46:05,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:05,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432266392] [2022-04-06 20:46:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:05,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:06,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2810 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:06,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:06,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432266392] [2022-04-06 20:46:06,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432266392] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:06,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126799176] [2022-04-06 20:46:06,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:06,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:06,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:06,505 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 20:46:06,506 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 20:46:06,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:46:06,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:06,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:46:06,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2810 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:46:06,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2810 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:46:06,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126799176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:06,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:06,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 5, 5] total 62 [2022-04-06 20:46:06,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [463546255] [2022-04-06 20:46:06,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [463546255] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:06,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:06,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:46:06,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414667686] [2022-04-06 20:46:06,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:06,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:46:06,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:46:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=2268, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:46:06,807 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 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 20:46:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:07,586 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-04-06 20:46:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:46:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 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 119 [2022-04-06 20:46:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:07,587 INFO L225 Difference]: With dead ends: 138 [2022-04-06 20:46:07,587 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:46:07,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4482, Invalid=8628, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:46:07,589 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:07,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 54 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:46:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-04-06 20:46:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 119 states have internal predecessors, (122), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-04-06 20:46:07,599 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 119 [2022-04-06 20:46:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:07,599 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-04-06 20:46:07,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 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 20:46:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-04-06 20:46:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:46:07,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:07,600 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:07,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:07,814 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,SelfDestructingSolverStorable55 [2022-04-06 20:46:07,814 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:07,819 INFO L85 PathProgramCache]: Analyzing trace with hash -917098359, now seen corresponding path program 103 times [2022-04-06 20:46:07,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:07,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147892752] [2022-04-06 20:46:07,834 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:07,834 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:07,834 INFO L85 PathProgramCache]: Analyzing trace with hash -917098359, now seen corresponding path program 104 times [2022-04-06 20:46:07,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:07,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579318673] [2022-04-06 20:46:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:07,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:08,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:08,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579318673] [2022-04-06 20:46:08,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579318673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246826743] [2022-04-06 20:46:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:08,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:08,420 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 20:46:08,421 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 20:46:08,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:08,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:46:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:08,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246826743] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:10,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 20:46:10,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:10,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147892752] [2022-04-06 20:46:10,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147892752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:10,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:10,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:46:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214328582] [2022-04-06 20:46:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:10,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:46:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:46:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:46:10,260 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 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 20:46:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:11,049 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2022-04-06 20:46:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:46:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 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 121 [2022-04-06 20:46:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:11,050 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:46:11,050 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 20:46:11,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:46:11,053 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:11,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 64 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 20:46:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-04-06 20:46:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 121 states have internal predecessors, (124), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-04-06 20:46:11,063 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 121 [2022-04-06 20:46:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:11,063 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-04-06 20:46:11,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 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 20:46:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-04-06 20:46:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:46:11,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:11,064 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:11,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:11,280 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,SelfDestructingSolverStorable56 [2022-04-06 20:46:11,280 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2099041754, now seen corresponding path program 105 times [2022-04-06 20:46:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:11,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151636571] [2022-04-06 20:46:11,282 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:11,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2099041754, now seen corresponding path program 106 times [2022-04-06 20:46:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:11,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307870167] [2022-04-06 20:46:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:11,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:12,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:12,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307870167] [2022-04-06 20:46:12,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307870167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530631119] [2022-04-06 20:46:12,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:12,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:12,158 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 20:46:12,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:46:12,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:12,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:12,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:46:12,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:12,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:14,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530631119] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:14,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:14,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 20:46:14,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:14,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151636571] [2022-04-06 20:46:14,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151636571] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:14,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:14,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:46:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275844644] [2022-04-06 20:46:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:14,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:46:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:46:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:46:14,325 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 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 20:46:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:15,116 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-04-06 20:46:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:46:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 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 123 [2022-04-06 20:46:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:15,117 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:46:15,117 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 20:46:15,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:46:15,118 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:15,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 44 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 20:46:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-04-06 20:46:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-04-06 20:46:15,123 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 123 [2022-04-06 20:46:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:15,123 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-04-06 20:46:15,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 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 20:46:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-04-06 20:46:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:46:15,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:15,124 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:15,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 20:46:15,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:15,339 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash 219689091, now seen corresponding path program 107 times [2022-04-06 20:46:15,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:15,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407198300] [2022-04-06 20:46:15,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:15,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash 219689091, now seen corresponding path program 108 times [2022-04-06 20:46:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:15,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843771328] [2022-04-06 20:46:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843771328] [2022-04-06 20:46:15,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843771328] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108398585] [2022-04-06 20:46:15,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:15,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:15,982 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:15,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:46:16,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:46:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:46:16,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:46:16,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:46:16,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108398585] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:16,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:16,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 5, 5] total 65 [2022-04-06 20:46:16,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407198300] [2022-04-06 20:46:16,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407198300] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:16,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:16,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:46:16,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577071778] [2022-04-06 20:46:16,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:16,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:46:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:46:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=2478, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:46:16,281 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 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 20:46:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:17,565 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2022-04-06 20:46:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:46:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 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 125 [2022-04-06 20:46:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:17,566 INFO L225 Difference]: With dead ends: 144 [2022-04-06 20:46:17,566 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:46:17,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4986, Invalid=9534, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:46:17,568 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:17,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 49 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:46:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 20:46:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-04-06 20:46:17,572 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 125 [2022-04-06 20:46:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:17,573 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-04-06 20:46:17,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 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 20:46:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-04-06 20:46:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:46:17,573 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:17,573 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:17,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:17,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:17,774 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -567995488, now seen corresponding path program 109 times [2022-04-06 20:46:17,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2039056226] [2022-04-06 20:46:17,775 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:17,775 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:17,775 INFO L85 PathProgramCache]: Analyzing trace with hash -567995488, now seen corresponding path program 110 times [2022-04-06 20:46:17,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:17,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591506623] [2022-04-06 20:46:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:17,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3250 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:18,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591506623] [2022-04-06 20:46:18,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591506623] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390233120] [2022-04-06 20:46:18,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:18,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:18,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:18,708 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:18,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:46:18,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:46:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3250 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:18,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3250 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:21,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390233120] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:21,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:21,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-04-06 20:46:21,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:21,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2039056226] [2022-04-06 20:46:21,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2039056226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:21,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:21,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:46:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505692165] [2022-04-06 20:46:21,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:21,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:46:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:46:21,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:46:21,481 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 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 20:46:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:22,688 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-04-06 20:46:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:46:22,688 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 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 127 [2022-04-06 20:46:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:22,689 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:46:22,689 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 20:46:22,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:46:22,690 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:22,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 49 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 20:46:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-04-06 20:46:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-04-06 20:46:22,699 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 127 [2022-04-06 20:46:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:22,700 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-04-06 20:46:22,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 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 20:46:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-04-06 20:46:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 20:46:22,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:22,708 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:22,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:22,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:46:22,923 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:22,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1618631811, now seen corresponding path program 111 times [2022-04-06 20:46:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1823738820] [2022-04-06 20:46:22,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:22,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1618631811, now seen corresponding path program 112 times [2022-04-06 20:46:22,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:22,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274540683] [2022-04-06 20:46:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:23,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3365 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:23,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274540683] [2022-04-06 20:46:23,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274540683] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:23,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923078914] [2022-04-06 20:46:23,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:23,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:23,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:23,828 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:23,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:46:23,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:23,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:46:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3365 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:24,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3365 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:26,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923078914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:26,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:26,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 20:46:26,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:26,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1823738820] [2022-04-06 20:46:26,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1823738820] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:26,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:26,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:46:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910188505] [2022-04-06 20:46:26,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:26,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:46:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:46:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:46:26,733 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 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 20:46:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:27,622 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2022-04-06 20:46:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:46:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-04-06 20:46:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:27,623 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:46:27,623 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 20:46:27,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:46:27,626 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:27,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 49 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 20:46:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-04-06 20:46:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-04-06 20:46:27,630 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 129 [2022-04-06 20:46:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:27,631 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-04-06 20:46:27,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 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 20:46:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-04-06 20:46:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:46:27,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:27,631 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:27,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:27,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:27,847 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1962823654, now seen corresponding path program 113 times [2022-04-06 20:46:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:27,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1202668584] [2022-04-06 20:46:27,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:27,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:27,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1962823654, now seen corresponding path program 114 times [2022-04-06 20:46:27,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:27,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551390076] [2022-04-06 20:46:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:27,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:28,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551390076] [2022-04-06 20:46:28,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551390076] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:28,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376738922] [2022-04-06 20:46:28,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:28,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:28,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:28,997 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:28,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:46:29,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:46:29,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:29,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:46:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:46:29,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:46:29,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376738922] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:29,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:29,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 5, 5] total 68 [2022-04-06 20:46:29,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:29,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1202668584] [2022-04-06 20:46:29,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1202668584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:29,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:29,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:46:29,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717278255] [2022-04-06 20:46:29,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:29,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:46:29,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:46:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=2697, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:46:29,490 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 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 20:46:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:30,500 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-04-06 20:46:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:46:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 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 131 [2022-04-06 20:46:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:30,501 INFO L225 Difference]: With dead ends: 150 [2022-04-06 20:46:30,501 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 20:46:30,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5517, Invalid=10485, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:46:30,502 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:30,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 44 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 20:46:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-04-06 20:46:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 states have internal predecessors, (134), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-04-06 20:46:30,507 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 131 [2022-04-06 20:46:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:30,507 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-04-06 20:46:30,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 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 20:46:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-04-06 20:46:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:46:30,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:30,507 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:30,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:30,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:46:30,719 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2018702985, now seen corresponding path program 115 times [2022-04-06 20:46:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:30,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158039117] [2022-04-06 20:46:30,720 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:30,720 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2018702985, now seen corresponding path program 116 times [2022-04-06 20:46:30,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:30,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315955003] [2022-04-06 20:46:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:30,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:31,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:31,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315955003] [2022-04-06 20:46:31,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315955003] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:31,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601131194] [2022-04-06 20:46:31,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:31,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:31,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:31,519 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:31,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:46:31,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:46:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:31,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:34,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601131194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:34,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:34,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-04-06 20:46:34,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:34,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158039117] [2022-04-06 20:46:34,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158039117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:34,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:34,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:46:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178830372] [2022-04-06 20:46:34,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:34,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:46:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:46:34,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:46:34,141 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 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 20:46:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:35,068 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2022-04-06 20:46:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:46:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 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 133 [2022-04-06 20:46:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:35,069 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:46:35,069 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 20:46:35,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:46:35,071 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:35,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 39 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 20:46:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-04-06 20:46:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 133 states have internal predecessors, (136), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-04-06 20:46:35,076 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 133 [2022-04-06 20:46:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:35,077 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-04-06 20:46:35,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 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 20:46:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-04-06 20:46:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 20:46:35,078 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:35,078 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:35,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:35,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-04-06 20:46:35,294 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:35,294 INFO L85 PathProgramCache]: Analyzing trace with hash 115834772, now seen corresponding path program 117 times [2022-04-06 20:46:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:35,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970445854] [2022-04-06 20:46:35,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:35,296 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash 115834772, now seen corresponding path program 118 times [2022-04-06 20:46:35,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:35,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348085509] [2022-04-06 20:46:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3722 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:36,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348085509] [2022-04-06 20:46:36,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348085509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059952724] [2022-04-06 20:46:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:36,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:36,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:36,018 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:36,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:46:36,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:36,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:46:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3722 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:36,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3722 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:38,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059952724] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:38,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:38,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 20:46:38,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:38,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970445854] [2022-04-06 20:46:38,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970445854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:38,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:38,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:46:38,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785660841] [2022-04-06 20:46:38,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:38,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:46:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:46:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:46:38,888 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 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 20:46:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:40,055 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-04-06 20:46:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:46:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 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 135 [2022-04-06 20:46:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:40,056 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:46:40,057 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 20:46:40,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:46:40,060 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:40,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 44 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 20:46:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-04-06 20:46:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 135 states have internal predecessors, (138), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-04-06 20:46:40,084 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 135 [2022-04-06 20:46:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:40,085 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-04-06 20:46:40,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 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 20:46:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-04-06 20:46:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:46:40,085 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:40,085 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:40,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 20:46:40,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:40,287 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1587748239, now seen corresponding path program 119 times [2022-04-06 20:46:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752865178] [2022-04-06 20:46:40,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:40,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1587748239, now seen corresponding path program 120 times [2022-04-06 20:46:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:40,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211854558] [2022-04-06 20:46:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:40,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:41,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:41,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:41,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211854558] [2022-04-06 20:46:41,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211854558] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19330554] [2022-04-06 20:46:41,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:41,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:41,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:41,338 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:41,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:46:41,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:46:41,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:41,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:46:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:46:41,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:46:41,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19330554] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:41,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:41,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 71 [2022-04-06 20:46:41,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:41,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752865178] [2022-04-06 20:46:41,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752865178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:41,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:41,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:46:41,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562707556] [2022-04-06 20:46:41,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:41,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:46:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:46:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=2925, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:46:41,745 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 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 20:46:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:42,914 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2022-04-06 20:46:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:46:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 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 137 [2022-04-06 20:46:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:42,915 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:46:42,915 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 20:46:42,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6075, Invalid=11481, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:46:42,916 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:42,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 44 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 20:46:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-04-06 20:46:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 137 states have internal predecessors, (140), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-04-06 20:46:42,940 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 137 [2022-04-06 20:46:42,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:42,940 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-04-06 20:46:42,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 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 20:46:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-04-06 20:46:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 20:46:42,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:42,940 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:42,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:43,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:43,155 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1946485262, now seen corresponding path program 121 times [2022-04-06 20:46:43,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735366912] [2022-04-06 20:46:43,157 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:43,157 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1946485262, now seen corresponding path program 122 times [2022-04-06 20:46:43,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:43,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143594553] [2022-04-06 20:46:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:43,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:44,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:44,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143594553] [2022-04-06 20:46:44,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143594553] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42846901] [2022-04-06 20:46:44,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:44,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:44,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:44,391 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:44,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:46:44,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:46:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:44,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:47,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42846901] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:47,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:47,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-04-06 20:46:47,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:47,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735366912] [2022-04-06 20:46:47,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735366912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:47,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:47,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:46:47,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768282570] [2022-04-06 20:46:47,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:47,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:46:47,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:46:47,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:46:47,243 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 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 20:46:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:48,284 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-04-06 20:46:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:46:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 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 139 [2022-04-06 20:46:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:48,285 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:46:48,285 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 20:46:48,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:46:48,288 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:48,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 54 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 20:46:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-04-06 20:46:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 139 states have internal predecessors, (142), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-04-06 20:46:48,293 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 139 [2022-04-06 20:46:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:48,293 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-04-06 20:46:48,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 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 20:46:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-04-06 20:46:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 20:46:48,293 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:48,293 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:48,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:46:48,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-04-06 20:46:48,507 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:48,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1025748587, now seen corresponding path program 123 times [2022-04-06 20:46:48,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:48,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500689974] [2022-04-06 20:46:48,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:48,509 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1025748587, now seen corresponding path program 124 times [2022-04-06 20:46:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255007884] [2022-04-06 20:46:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:49,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:49,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:49,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255007884] [2022-04-06 20:46:49,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255007884] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:49,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96746784] [2022-04-06 20:46:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:49,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:49,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:49,400 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:49,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:46:49,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:49,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:46:49,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:49,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:52,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96746784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:52,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:52,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 20:46:52,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500689974] [2022-04-06 20:46:52,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500689974] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:52,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:52,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:46:52,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360214122] [2022-04-06 20:46:52,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:52,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:46:52,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:46:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 20:46:52,702 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 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 20:46:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:53,716 INFO L93 Difference]: Finished difference Result 160 states and 167 transitions. [2022-04-06 20:46:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:46:53,716 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 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 20:46:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:53,717 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:46:53,717 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 20:46:53,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:46:53,720 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:53,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 44 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 20:46:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-04-06 20:46:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 141 states have internal predecessors, (144), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-04-06 20:46:53,725 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 141 [2022-04-06 20:46:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:53,725 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-04-06 20:46:53,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 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 20:46:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-04-06 20:46:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:46:53,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:53,726 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:53,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:53,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:46:53,941 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:53,941 INFO L85 PathProgramCache]: Analyzing trace with hash 961066888, now seen corresponding path program 125 times [2022-04-06 20:46:53,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:53,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1728667757] [2022-04-06 20:46:53,943 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:53,943 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 961066888, now seen corresponding path program 126 times [2022-04-06 20:46:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:53,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711037017] [2022-04-06 20:46:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4226 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:54,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711037017] [2022-04-06 20:46:54,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711037017] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275692123] [2022-04-06 20:46:54,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:54,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:54,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:54,769 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:54,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:46:54,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:46:54,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:46:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4226 backedges. 65 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:46:55,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4226 backedges. 65 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:46:55,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275692123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:55,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:55,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 5, 5] total 74 [2022-04-06 20:46:55,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:55,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1728667757] [2022-04-06 20:46:55,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1728667757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:55,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:55,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:46:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840467200] [2022-04-06 20:46:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:55,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:46:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:46:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2240, Invalid=3162, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:46:55,320 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 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 20:46:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:56,454 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-04-06 20:46:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:46:56,454 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 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 143 [2022-04-06 20:46:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:56,455 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:46:56,455 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 20:46:56,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6660, Invalid=12522, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:46:56,456 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:56,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 20:46:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-04-06 20:46:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 142 states have (on average 1.028169014084507) internal successors, (146), 143 states have internal predecessors, (146), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:46:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-04-06 20:46:56,461 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 143 [2022-04-06 20:46:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:56,461 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-04-06 20:46:56,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 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 20:46:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-04-06 20:46:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 20:46:56,462 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:56,462 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:56,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:56,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:56,678 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1068503707, now seen corresponding path program 127 times [2022-04-06 20:46:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:56,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176530294] [2022-04-06 20:46:56,679 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:56,679 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1068503707, now seen corresponding path program 128 times [2022-04-06 20:46:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:56,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092673237] [2022-04-06 20:46:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4357 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092673237] [2022-04-06 20:46:57,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092673237] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352280857] [2022-04-06 20:46:57,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:57,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:57,722 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:57,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:46:57,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:57,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:46:57,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4357 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:57,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4357 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:00,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352280857] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:00,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:00,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-04-06 20:47:00,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176530294] [2022-04-06 20:47:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176530294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:00,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:00,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:47:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482004014] [2022-04-06 20:47:00,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:00,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:47:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:47:00,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:47:00,456 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 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 20:47:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:01,672 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2022-04-06 20:47:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:47:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 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 145 [2022-04-06 20:47:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:01,673 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:47:01,673 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 20:47:01,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:47:01,676 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:01,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 49 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 20:47:01,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-04-06 20:47:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 145 states have internal predecessors, (148), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-04-06 20:47:01,681 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 145 [2022-04-06 20:47:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:01,682 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-04-06 20:47:01,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 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 20:47:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-04-06 20:47:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 20:47:01,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:01,682 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:01,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:01,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:47:01,898 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:01,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1570693118, now seen corresponding path program 129 times [2022-04-06 20:47:01,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:01,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335245285] [2022-04-06 20:47:01,899 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:01,899 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1570693118, now seen corresponding path program 130 times [2022-04-06 20:47:01,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:01,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040597405] [2022-04-06 20:47:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:01,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:03,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4490 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:03,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040597405] [2022-04-06 20:47:03,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040597405] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749993021] [2022-04-06 20:47:03,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:03,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:03,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:03,151 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:03,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:47:03,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:03,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:47:03,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4490 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:03,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4490 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:07,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749993021] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:07,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:07,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 20:47:07,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335245285] [2022-04-06 20:47:07,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335245285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:07,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:07,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:47:07,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966899101] [2022-04-06 20:47:07,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:07,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:47:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:47:07,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:47:07,094 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 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 20:47:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:08,430 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-04-06 20:47:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:47:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 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 147 [2022-04-06 20:47:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:08,431 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:47:08,431 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 20:47:08,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:47:08,433 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:08,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 39 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 20:47:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-04-06 20:47:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 147 states have internal predecessors, (150), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-04-06 20:47:08,439 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 147 [2022-04-06 20:47:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:08,439 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-04-06 20:47:08,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 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 20:47:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-04-06 20:47:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:47:08,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:08,440 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:08,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:08,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:47:08,655 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1156587359, now seen corresponding path program 131 times [2022-04-06 20:47:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1934982426] [2022-04-06 20:47:08,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:08,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1156587359, now seen corresponding path program 132 times [2022-04-06 20:47:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932168878] [2022-04-06 20:47:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:09,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932168878] [2022-04-06 20:47:09,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932168878] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588145476] [2022-04-06 20:47:09,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:09,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:09,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:09,514 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:09,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:47:09,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:47:09,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:09,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:47:09,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:47:09,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:47:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588145476] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:09,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:09,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 5, 5] total 77 [2022-04-06 20:47:09,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1934982426] [2022-04-06 20:47:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1934982426] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:09,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:09,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:47:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129706618] [2022-04-06 20:47:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:09,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:47:09,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:47:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2444, Invalid=3408, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:47:09,901 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 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 20:47:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:11,103 INFO L93 Difference]: Finished difference Result 168 states and 175 transitions. [2022-04-06 20:47:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:47:11,103 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 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 149 [2022-04-06 20:47:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:11,104 INFO L225 Difference]: With dead ends: 168 [2022-04-06 20:47:11,104 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 20:47:11,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7272, Invalid=13608, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:47:11,105 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:11,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 44 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 20:47:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-04-06 20:47:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.027027027027027) internal successors, (152), 149 states have internal predecessors, (152), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-04-06 20:47:11,121 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 149 [2022-04-06 20:47:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:11,121 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-04-06 20:47:11,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 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 20:47:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-04-06 20:47:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 20:47:11,122 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:11,122 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:11,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:11,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:11,337 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:11,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2143075196, now seen corresponding path program 133 times [2022-04-06 20:47:11,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:11,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1297921168] [2022-04-06 20:47:11,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:11,339 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2143075196, now seen corresponding path program 134 times [2022-04-06 20:47:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685674457] [2022-04-06 20:47:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:12,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:12,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685674457] [2022-04-06 20:47:12,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685674457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666612485] [2022-04-06 20:47:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:12,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:12,274 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:12,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:47:12,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:12,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:47:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:12,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:15,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666612485] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:15,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:15,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-04-06 20:47:15,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1297921168] [2022-04-06 20:47:15,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1297921168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:15,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:15,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:47:15,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55605419] [2022-04-06 20:47:15,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:15,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:47:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:47:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:47:15,633 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 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 20:47:16,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:16,822 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-04-06 20:47:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:47:16,823 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 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 151 [2022-04-06 20:47:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:16,823 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:47:16,823 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:47:16,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=19602, Invalid=24708, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:47:16,826 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:16,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 34 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:47:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-04-06 20:47:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 151 states have internal predecessors, (154), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-04-06 20:47:16,831 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 151 [2022-04-06 20:47:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:16,832 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-04-06 20:47:16,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 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 20:47:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-04-06 20:47:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:47:16,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:16,832 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:16,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:17,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-04-06 20:47:17,048 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:17,049 INFO L85 PathProgramCache]: Analyzing trace with hash 970114137, now seen corresponding path program 135 times [2022-04-06 20:47:17,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:17,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767522378] [2022-04-06 20:47:17,050 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:17,050 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:17,050 INFO L85 PathProgramCache]: Analyzing trace with hash 970114137, now seen corresponding path program 136 times [2022-04-06 20:47:17,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:17,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200142555] [2022-04-06 20:47:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:17,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:18,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:18,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200142555] [2022-04-06 20:47:18,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200142555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066404542] [2022-04-06 20:47:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:18,335 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:18,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:47:18,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:47:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:18,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066404542] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:21,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:21,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 20:47:21,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:21,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767522378] [2022-04-06 20:47:21,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767522378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:21,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:21,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:47:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525377944] [2022-04-06 20:47:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:21,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:47:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:47:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 20:47:21,513 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 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 20:47:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:22,722 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2022-04-06 20:47:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:47:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 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 153 [2022-04-06 20:47:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:22,724 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:47:22,724 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 20:47:22,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:47:22,727 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:22,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 49 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 20:47:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-04-06 20:47:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 153 states have internal predecessors, (156), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-04-06 20:47:22,732 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 153 [2022-04-06 20:47:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:22,734 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-04-06 20:47:22,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 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 20:47:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-04-06 20:47:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:47:22,735 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:22,735 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:22,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:22,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:22,950 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:22,951 INFO L85 PathProgramCache]: Analyzing trace with hash -964032010, now seen corresponding path program 137 times [2022-04-06 20:47:22,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:22,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [515647182] [2022-04-06 20:47:22,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:22,952 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash -964032010, now seen corresponding path program 138 times [2022-04-06 20:47:22,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:22,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059767400] [2022-04-06 20:47:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:22,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:23,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:23,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:23,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059767400] [2022-04-06 20:47:23,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059767400] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:23,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166815547] [2022-04-06 20:47:23,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:23,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:23,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:23,929 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:23,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:47:23,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:47:23,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:47:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:47:24,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:47:24,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166815547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:24,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:24,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 5, 5] total 80 [2022-04-06 20:47:24,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:24,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [515647182] [2022-04-06 20:47:24,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [515647182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:24,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:24,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:47:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019056335] [2022-04-06 20:47:24,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:24,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:47:24,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:47:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2657, Invalid=3663, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:47:24,388 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 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 20:47:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:25,677 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-04-06 20:47:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:47:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 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 155 [2022-04-06 20:47:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:25,678 INFO L225 Difference]: With dead ends: 174 [2022-04-06 20:47:25,678 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:47:25,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7911, Invalid=14739, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:47:25,679 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:25,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 34 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:47:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-04-06 20:47:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.025974025974026) internal successors, (158), 155 states have internal predecessors, (158), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-04-06 20:47:25,684 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 155 [2022-04-06 20:47:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:25,685 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-04-06 20:47:25,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 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 20:47:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-04-06 20:47:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 20:47:25,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:25,685 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:25,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:25,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:25,901 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 42359891, now seen corresponding path program 139 times [2022-04-06 20:47:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:25,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1050538903] [2022-04-06 20:47:25,902 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:25,903 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 42359891, now seen corresponding path program 140 times [2022-04-06 20:47:25,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:25,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761942278] [2022-04-06 20:47:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:25,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:26,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:26,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761942278] [2022-04-06 20:47:26,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761942278] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320586269] [2022-04-06 20:47:26,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:26,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:26,870 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:26,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:47:26,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:26,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:26,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:47:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:27,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:31,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320586269] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:31,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:31,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-04-06 20:47:31,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:31,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1050538903] [2022-04-06 20:47:31,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1050538903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:31,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:31,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:47:31,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956376265] [2022-04-06 20:47:31,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:31,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:47:31,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:47:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:47:31,049 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 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 20:47:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:33,076 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2022-04-06 20:47:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:47:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 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 157 [2022-04-06 20:47:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:33,077 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:47:33,077 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 20:47:33,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=21318, Invalid=26862, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:47:33,080 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:33,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 44 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 20:47:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-04-06 20:47:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 157 states have internal predecessors, (160), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-04-06 20:47:33,085 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 157 [2022-04-06 20:47:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:33,085 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-04-06 20:47:33,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 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 20:47:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-04-06 20:47:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 20:47:33,086 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:33,086 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:33,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:33,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:33,287 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash 817335152, now seen corresponding path program 141 times [2022-04-06 20:47:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:33,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776431607] [2022-04-06 20:47:33,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:33,288 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash 817335152, now seen corresponding path program 142 times [2022-04-06 20:47:33,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:33,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734550549] [2022-04-06 20:47:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:34,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5330 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734550549] [2022-04-06 20:47:34,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734550549] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426226784] [2022-04-06 20:47:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:34,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:34,932 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:34,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:47:34,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:47:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5330 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:35,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5330 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:39,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426226784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:39,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:39,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 20:47:39,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:39,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776431607] [2022-04-06 20:47:39,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776431607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:39,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:39,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:47:39,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091056569] [2022-04-06 20:47:39,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:39,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:47:39,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:39,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:47:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 20:47:39,663 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 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 20:47:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:41,004 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-04-06 20:47:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:47:41,004 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 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 159 [2022-04-06 20:47:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:41,005 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:47:41,005 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 20:47:41,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:47:41,007 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:41,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 39 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 20:47:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-04-06 20:47:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-04-06 20:47:41,013 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 159 [2022-04-06 20:47:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:41,013 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-04-06 20:47:41,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 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 20:47:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-04-06 20:47:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:47:41,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:41,014 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:41,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:41,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-04-06 20:47:41,229 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:41,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1755748531, now seen corresponding path program 143 times [2022-04-06 20:47:41,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:41,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1898098528] [2022-04-06 20:47:41,231 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:41,231 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1755748531, now seen corresponding path program 144 times [2022-04-06 20:47:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:41,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131948795] [2022-04-06 20:47:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:42,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:42,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:42,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131948795] [2022-04-06 20:47:42,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131948795] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:42,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126446164] [2022-04-06 20:47:42,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:42,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:42,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:42,267 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:42,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:47:42,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:47:42,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:47:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:47:42,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:47:42,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126446164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:42,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:42,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 5, 5] total 83 [2022-04-06 20:47:42,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:42,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1898098528] [2022-04-06 20:47:42,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1898098528] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:42,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:42,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:47:42,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307608009] [2022-04-06 20:47:42,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:42,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:47:42,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:47:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2879, Invalid=3927, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:47:42,717 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 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 20:47:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:44,400 INFO L93 Difference]: Finished difference Result 180 states and 187 transitions. [2022-04-06 20:47:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:47:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 20:47:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:44,401 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:47:44,401 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 20:47:44,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3442 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8577, Invalid=15915, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:47:44,402 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:44,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 20:47:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-04-06 20:47:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 160 states have (on average 1.025) internal successors, (164), 161 states have internal predecessors, (164), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-04-06 20:47:44,408 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 161 [2022-04-06 20:47:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:44,408 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-04-06 20:47:44,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 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 20:47:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-04-06 20:47:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:47:44,409 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:44,409 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:44,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:44,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:44,613 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash -588005398, now seen corresponding path program 145 times [2022-04-06 20:47:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:44,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1415745815] [2022-04-06 20:47:44,614 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:44,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash -588005398, now seen corresponding path program 146 times [2022-04-06 20:47:44,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:44,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579843505] [2022-04-06 20:47:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:46,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5626 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:46,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:46,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579843505] [2022-04-06 20:47:46,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579843505] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:46,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294985780] [2022-04-06 20:47:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:46,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:46,228 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:47:46,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:46,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:47:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5626 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:46,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5626 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:51,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294985780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:51,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:51,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-04-06 20:47:51,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1415745815] [2022-04-06 20:47:51,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1415745815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:51,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:51,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:47:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755780341] [2022-04-06 20:47:51,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:51,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:47:51,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:47:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:47:51,462 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 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 20:47:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:52,865 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-04-06 20:47:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:47:52,866 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 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 163 [2022-04-06 20:47:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:52,866 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:47:52,867 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 20:47:52,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=23106, Invalid=29106, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:47:52,869 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:52,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 64 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 20:47:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-04-06 20:47:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 163 states have internal predecessors, (166), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-04-06 20:47:52,875 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 163 [2022-04-06 20:47:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:52,875 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-04-06 20:47:52,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 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 20:47:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-04-06 20:47:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 20:47:52,876 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:52,876 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:52,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:53,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:53,081 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash 626681159, now seen corresponding path program 147 times [2022-04-06 20:47:53,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:53,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168160119] [2022-04-06 20:47:53,083 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:53,083 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 626681159, now seen corresponding path program 148 times [2022-04-06 20:47:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:53,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339597036] [2022-04-06 20:47:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:54,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5777 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:54,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339597036] [2022-04-06 20:47:54,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339597036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352722343] [2022-04-06 20:47:54,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:54,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:54,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:54,574 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:54,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:47:54,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:47:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5777 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:54,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5777 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:57,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352722343] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:57,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:57,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 20:47:57,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168160119] [2022-04-06 20:47:57,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168160119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:57,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:57,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:47:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035792993] [2022-04-06 20:47:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:57,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:47:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:57,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:47:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 20:47:57,924 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 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 20:47:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:59,386 INFO L93 Difference]: Finished difference Result 184 states and 191 transitions. [2022-04-06 20:47:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:47:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 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 165 [2022-04-06 20:47:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:59,391 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:47:59,391 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 20:47:59,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:47:59,393 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:59,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 39 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 20:47:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-04-06 20:47:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 164 states have (on average 1.024390243902439) internal successors, (168), 165 states have internal predecessors, (168), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:47:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-04-06 20:47:59,398 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 165 [2022-04-06 20:47:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:59,398 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-04-06 20:47:59,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 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 20:47:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-04-06 20:47:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:47:59,399 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:59,399 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:59,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:59,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-04-06 20:47:59,615 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:59,615 INFO L85 PathProgramCache]: Analyzing trace with hash -290642076, now seen corresponding path program 149 times [2022-04-06 20:47:59,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:59,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350825338] [2022-04-06 20:47:59,616 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:59,616 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash -290642076, now seen corresponding path program 150 times [2022-04-06 20:47:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:59,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678526026] [2022-04-06 20:47:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:59,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:00,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:00,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678526026] [2022-04-06 20:48:00,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678526026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189996608] [2022-04-06 20:48:00,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:00,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:00,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:00,952 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:00,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:48:00,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:48:00,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:48:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:48:01,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:48:01,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189996608] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:01,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:01,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 5, 5] total 86 [2022-04-06 20:48:01,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:01,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350825338] [2022-04-06 20:48:01,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350825338] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:01,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:01,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:48:01,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840559243] [2022-04-06 20:48:01,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:01,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:48:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:48:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3110, Invalid=4200, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:48:01,367 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 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 20:48:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:02,813 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-04-06 20:48:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:48:02,813 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 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 167 [2022-04-06 20:48:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:02,814 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:48:02,814 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 20:48:02,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9270, Invalid=17136, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:48:02,815 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:02,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 34 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 20:48:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-06 20:48:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 167 states have internal predecessors, (170), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-04-06 20:48:02,821 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 167 [2022-04-06 20:48:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:02,821 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-04-06 20:48:02,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 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 20:48:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-04-06 20:48:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 20:48:02,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:02,822 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:02,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:03,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-04-06 20:48:03,038 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:03,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1369975231, now seen corresponding path program 151 times [2022-04-06 20:48:03,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:03,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25035871] [2022-04-06 20:48:03,039 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:03,039 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1369975231, now seen corresponding path program 152 times [2022-04-06 20:48:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:03,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537006071] [2022-04-06 20:48:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:03,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:04,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6085 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:04,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537006071] [2022-04-06 20:48:04,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537006071] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:04,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567801577] [2022-04-06 20:48:04,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:04,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:04,180 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:04,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:48:04,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:04,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:48:04,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6085 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6085 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:07,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567801577] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:07,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:07,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-04-06 20:48:07,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:07,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25035871] [2022-04-06 20:48:07,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25035871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:07,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:07,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:48:07,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649288456] [2022-04-06 20:48:07,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:07,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:48:07,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:48:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:48:07,809 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 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 20:48:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:09,292 INFO L93 Difference]: Finished difference Result 188 states and 195 transitions. [2022-04-06 20:48:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:48:09,293 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 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 169 [2022-04-06 20:48:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:09,293 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:48:09,293 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 20:48:09,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=24966, Invalid=31440, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:48:09,297 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:09,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 34 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 20:48:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-04-06 20:48:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 169 states have internal predecessors, (172), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-04-06 20:48:09,303 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 169 [2022-04-06 20:48:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:09,303 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-04-06 20:48:09,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 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 20:48:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-04-06 20:48:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 20:48:09,304 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:09,304 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:09,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:09,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:09,516 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 772948446, now seen corresponding path program 153 times [2022-04-06 20:48:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:09,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [255466201] [2022-04-06 20:48:09,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:09,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 772948446, now seen corresponding path program 154 times [2022-04-06 20:48:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:09,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331026970] [2022-04-06 20:48:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:09,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:11,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6242 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331026970] [2022-04-06 20:48:11,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331026970] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822797174] [2022-04-06 20:48:11,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:11,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:11,289 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:11,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:48:11,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:11,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:48:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6242 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:11,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6242 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:16,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822797174] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:16,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:16,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 20:48:16,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [255466201] [2022-04-06 20:48:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [255466201] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:16,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:16,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:48:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735477660] [2022-04-06 20:48:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:16,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:48:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:48:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:48:16,068 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 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 20:48:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:17,890 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-04-06 20:48:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:48:17,890 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 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 171 [2022-04-06 20:48:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:17,891 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:48:17,891 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 20:48:17,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 20:48:17,893 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:17,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 39 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 20:48:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-04-06 20:48:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 171 states have internal predecessors, (174), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-04-06 20:48:17,899 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 171 [2022-04-06 20:48:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:17,899 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-04-06 20:48:17,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 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 20:48:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-04-06 20:48:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:48:17,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:17,901 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:17,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:18,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:18,117 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:18,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1461700037, now seen corresponding path program 155 times [2022-04-06 20:48:18,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:18,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742888734] [2022-04-06 20:48:18,118 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:18,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1461700037, now seen corresponding path program 156 times [2022-04-06 20:48:18,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:18,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032103252] [2022-04-06 20:48:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:18,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:19,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6401 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:19,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:19,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032103252] [2022-04-06 20:48:19,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032103252] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:19,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519367733] [2022-04-06 20:48:19,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:19,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:19,660 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:19,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:48:19,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:48:19,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:48:19,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6401 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:48:19,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6401 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:48:20,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519367733] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:20,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:20,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 5, 5] total 89 [2022-04-06 20:48:20,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742888734] [2022-04-06 20:48:20,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742888734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:20,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:20,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:48:20,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879737416] [2022-04-06 20:48:20,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:20,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:48:20,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:48:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3350, Invalid=4482, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:48:20,055 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 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 20:48:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:22,263 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2022-04-06 20:48:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:48:22,263 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 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 173 [2022-04-06 20:48:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:22,264 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:48:22,264 INFO L226 Difference]: Without dead ends: 179 [2022-04-06 20:48:22,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9990, Invalid=18402, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:48:22,265 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:22,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 49 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-06 20:48:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-04-06 20:48:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 173 states have internal predecessors, (176), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2022-04-06 20:48:22,271 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 173 [2022-04-06 20:48:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:22,271 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2022-04-06 20:48:22,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 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 20:48:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2022-04-06 20:48:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 20:48:22,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:22,272 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:22,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 20:48:22,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-04-06 20:48:22,473 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1475244200, now seen corresponding path program 157 times [2022-04-06 20:48:22,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:22,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960341371] [2022-04-06 20:48:22,474 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:22,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1475244200, now seen corresponding path program 158 times [2022-04-06 20:48:22,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:22,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990190477] [2022-04-06 20:48:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:24,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:24,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990190477] [2022-04-06 20:48:24,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990190477] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745621442] [2022-04-06 20:48:24,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:24,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:24,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:24,558 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:24,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:48:24,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:24,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:24,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 20:48:24,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:24,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:30,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745621442] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:30,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:30,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-04-06 20:48:30,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:30,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960341371] [2022-04-06 20:48:30,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960341371] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:30,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:30,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:48:30,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237357691] [2022-04-06 20:48:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:30,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:48:30,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:48:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:48:30,564 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 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 20:48:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:32,146 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2022-04-06 20:48:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:48:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 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 175 [2022-04-06 20:48:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:32,147 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:48:32,147 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 20:48:32,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=26898, Invalid=33864, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 20:48:32,151 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:32,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 39 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 20:48:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-04-06 20:48:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 175 states have internal predecessors, (178), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-04-06 20:48:32,165 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 175 [2022-04-06 20:48:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:32,166 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-04-06 20:48:32,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 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 20:48:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-04-06 20:48:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 20:48:32,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:32,166 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:32,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 20:48:32,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:32,382 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1606282955, now seen corresponding path program 159 times [2022-04-06 20:48:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:32,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369071681] [2022-04-06 20:48:32,384 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:32,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1606282955, now seen corresponding path program 160 times [2022-04-06 20:48:32,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:32,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331221227] [2022-04-06 20:48:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:34,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:34,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:34,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331221227] [2022-04-06 20:48:34,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331221227] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:34,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943187994] [2022-04-06 20:48:34,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:34,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:34,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:34,095 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:34,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:48:34,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:34,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:48:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:34,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:38,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943187994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:38,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:38,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 20:48:38,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369071681] [2022-04-06 20:48:38,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369071681] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:38,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:38,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:48:38,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130895267] [2022-04-06 20:48:38,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:38,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:48:38,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:38,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:48:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 20:48:38,970 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 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 20:48:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:40,616 INFO L93 Difference]: Finished difference Result 196 states and 203 transitions. [2022-04-06 20:48:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:48:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 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 177 [2022-04-06 20:48:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:40,617 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:48:40,617 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 20:48:40,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 20:48:40,620 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:40,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 64 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 20:48:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-04-06 20:48:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 177 states have internal predecessors, (180), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-04-06 20:48:40,635 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 177 [2022-04-06 20:48:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:40,635 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-04-06 20:48:40,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 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 20:48:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-04-06 20:48:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:48:40,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:40,636 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:40,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:40,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:40,852 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:40,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1314492370, now seen corresponding path program 161 times [2022-04-06 20:48:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:40,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [799839142] [2022-04-06 20:48:40,854 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:40,854 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1314492370, now seen corresponding path program 162 times [2022-04-06 20:48:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:40,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065090204] [2022-04-06 20:48:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:42,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:42,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:42,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065090204] [2022-04-06 20:48:42,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065090204] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:42,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768548084] [2022-04-06 20:48:42,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:42,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:42,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:42,907 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:42,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:48:42,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:48:42,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:42,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:48:42,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:48:43,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:48:43,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768548084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:43,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:43,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 5, 5] total 92 [2022-04-06 20:48:43,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:43,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [799839142] [2022-04-06 20:48:43,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [799839142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:43,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:43,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:48:43,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340229692] [2022-04-06 20:48:43,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:43,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:48:43,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:43,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:48:43,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=4773, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:48:43,386 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 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 20:48:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:45,083 INFO L93 Difference]: Finished difference Result 198 states and 205 transitions. [2022-04-06 20:48:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:48:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 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 179 [2022-04-06 20:48:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:45,084 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:48:45,084 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 20:48:45,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4234 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10737, Invalid=19713, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:48:45,086 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:45,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 64 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 20:48:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-04-06 20:48:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 179 states have internal predecessors, (182), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-04-06 20:48:45,093 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 179 [2022-04-06 20:48:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:45,093 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-04-06 20:48:45,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 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 20:48:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-04-06 20:48:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 20:48:45,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:45,094 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:45,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:45,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-04-06 20:48:45,307 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash -729031889, now seen corresponding path program 163 times [2022-04-06 20:48:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339806617] [2022-04-06 20:48:45,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:45,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash -729031889, now seen corresponding path program 164 times [2022-04-06 20:48:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479185673] [2022-04-06 20:48:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479185673] [2022-04-06 20:48:47,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479185673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310221151] [2022-04-06 20:48:47,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:47,056 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:47,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:48:47,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:47,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:47,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:48:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:47,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:51,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310221151] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:51,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:51,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-04-06 20:48:51,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339806617] [2022-04-06 20:48:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339806617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:51,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:51,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:48:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565863258] [2022-04-06 20:48:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:51,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:48:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:48:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:48:51,378 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 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 20:48:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:53,157 INFO L93 Difference]: Finished difference Result 200 states and 207 transitions. [2022-04-06 20:48:53,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:48:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 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 181 [2022-04-06 20:48:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:53,159 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:48:53,159 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 20:48:53,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=28902, Invalid=36378, Unknown=0, NotChecked=0, Total=65280 [2022-04-06 20:48:53,163 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:53,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 49 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 20:48:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-04-06 20:48:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 181 states have internal predecessors, (184), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:48:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-04-06 20:48:53,200 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 181 [2022-04-06 20:48:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:53,200 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-04-06 20:48:53,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 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 20:48:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-04-06 20:48:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:48:53,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:53,201 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:53,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:53,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:53,401 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:53,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1755790516, now seen corresponding path program 165 times [2022-04-06 20:48:53,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:53,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666740974] [2022-04-06 20:48:53,403 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:53,403 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1755790516, now seen corresponding path program 166 times [2022-04-06 20:48:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:53,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947695635] [2022-04-06 20:48:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:54,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7226 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:54,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947695635] [2022-04-06 20:48:54,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947695635] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100860060] [2022-04-06 20:48:54,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:54,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:54,769 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:54,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:48:54,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:54,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:54,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:48:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7226 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:55,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7226 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:00,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100860060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:00,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:00,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 20:49:00,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:00,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666740974] [2022-04-06 20:49:00,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666740974] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:00,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:00,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:49:00,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931672081] [2022-04-06 20:49:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:00,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:49:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:49:00,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 20:49:00,784 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 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 20:49:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:02,604 INFO L93 Difference]: Finished difference Result 202 states and 209 transitions. [2022-04-06 20:49:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:49:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 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 183 [2022-04-06 20:49:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:02,605 INFO L225 Difference]: With dead ends: 202 [2022-04-06 20:49:02,605 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 20:49:02,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 20:49:02,608 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:02,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 44 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 20:49:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 20:49:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 182 states have (on average 1.021978021978022) internal successors, (186), 183 states have internal predecessors, (186), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-04-06 20:49:02,640 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 183 [2022-04-06 20:49:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:02,640 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-04-06 20:49:02,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 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 20:49:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-04-06 20:49:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:49:02,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:02,641 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:02,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:02,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:02,853 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -628352983, now seen corresponding path program 167 times [2022-04-06 20:49:02,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:02,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866753561] [2022-04-06 20:49:02,855 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:02,855 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash -628352983, now seen corresponding path program 168 times [2022-04-06 20:49:02,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524694772] [2022-04-06 20:49:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:02,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:04,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7397 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:04,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:04,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524694772] [2022-04-06 20:49:04,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524694772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:04,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58401411] [2022-04-06 20:49:04,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:04,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:04,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:04,531 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:04,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:49:04,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:04,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:49:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7397 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:49:04,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7397 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:49:04,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58401411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:04,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:04,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 5, 5] total 95 [2022-04-06 20:49:04,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866753561] [2022-04-06 20:49:04,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866753561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:04,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:04,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:49:04,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947234171] [2022-04-06 20:49:04,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:04,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:49:04,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:49:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3857, Invalid=5073, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:49:04,969 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 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 20:49:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:07,178 INFO L93 Difference]: Finished difference Result 204 states and 211 transitions. [2022-04-06 20:49:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:49:07,178 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2022-04-06 20:49:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:07,179 INFO L225 Difference]: With dead ends: 204 [2022-04-06 20:49:07,179 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 20:49:07,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4516 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11511, Invalid=21069, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:49:07,182 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:07,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 39 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 20:49:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-04-06 20:49:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 185 states have internal predecessors, (188), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:07,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-04-06 20:49:07,189 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 185 [2022-04-06 20:49:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:07,189 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-04-06 20:49:07,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 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 20:49:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-04-06 20:49:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 20:49:07,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:07,190 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:07,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:07,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-04-06 20:49:07,406 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash 507357638, now seen corresponding path program 169 times [2022-04-06 20:49:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:07,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326460938] [2022-04-06 20:49:07,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:07,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash 507357638, now seen corresponding path program 170 times [2022-04-06 20:49:07,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:07,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688430236] [2022-04-06 20:49:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:07,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:08,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688430236] [2022-04-06 20:49:08,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688430236] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375094126] [2022-04-06 20:49:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:08,971 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:08,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:49:09,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:09,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:09,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:49:09,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:09,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375094126] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:13,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:13,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-04-06 20:49:13,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:13,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326460938] [2022-04-06 20:49:13,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326460938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:13,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:13,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:49:13,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117826855] [2022-04-06 20:49:13,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:13,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:49:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:13,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:49:13,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:49:13,848 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 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 20:49:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:16,408 INFO L93 Difference]: Finished difference Result 206 states and 213 transitions. [2022-04-06 20:49:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:49:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 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 187 [2022-04-06 20:49:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:16,409 INFO L225 Difference]: With dead ends: 206 [2022-04-06 20:49:16,409 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 20:49:16,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=30978, Invalid=38982, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 20:49:16,412 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 99 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:16,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 74 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:49:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 20:49:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-04-06 20:49:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.021505376344086) internal successors, (190), 187 states have internal predecessors, (190), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-04-06 20:49:16,419 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 187 [2022-04-06 20:49:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:16,419 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-04-06 20:49:16,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 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 20:49:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-04-06 20:49:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 20:49:16,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:16,420 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:16,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 20:49:16,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:16,636 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1003571235, now seen corresponding path program 171 times [2022-04-06 20:49:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:16,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1540978216] [2022-04-06 20:49:16,637 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:16,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1003571235, now seen corresponding path program 172 times [2022-04-06 20:49:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383634745] [2022-04-06 20:49:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:18,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7745 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:18,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:18,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383634745] [2022-04-06 20:49:18,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383634745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:18,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525205744] [2022-04-06 20:49:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:18,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:18,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:18,890 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:18,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:49:18,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:18,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:49:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7745 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:19,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7745 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:24,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525205744] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:24,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:24,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 20:49:24,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1540978216] [2022-04-06 20:49:24,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1540978216] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:24,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:24,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:49:24,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671341884] [2022-04-06 20:49:24,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:24,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:49:24,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:49:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 20:49:24,201 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 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 20:49:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:26,375 INFO L93 Difference]: Finished difference Result 208 states and 215 transitions. [2022-04-06 20:49:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:49:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 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 189 [2022-04-06 20:49:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:26,376 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:49:26,376 INFO L226 Difference]: Without dead ends: 195 [2022-04-06 20:49:26,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 20:49:26,379 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:26,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 39 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-04-06 20:49:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-04-06 20:49:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 189 states have internal predecessors, (192), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-04-06 20:49:26,385 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 189 [2022-04-06 20:49:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:26,386 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-04-06 20:49:26,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 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 20:49:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-04-06 20:49:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:49:26,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:26,386 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:26,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:26,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:26,599 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1123468096, now seen corresponding path program 173 times [2022-04-06 20:49:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89779421] [2022-04-06 20:49:26,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:26,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1123468096, now seen corresponding path program 174 times [2022-04-06 20:49:26,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:26,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757390693] [2022-04-06 20:49:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:26,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:28,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7922 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:28,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:28,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757390693] [2022-04-06 20:49:28,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757390693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:28,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329381179] [2022-04-06 20:49:28,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:28,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:28,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:28,530 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:28,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:49:28,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:28,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:28,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:49:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7922 backedges. 89 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:49:28,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7922 backedges. 89 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:49:28,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329381179] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:28,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:28,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 5, 5] total 98 [2022-04-06 20:49:28,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89779421] [2022-04-06 20:49:28,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89779421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:28,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:28,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:49:28,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022507149] [2022-04-06 20:49:28,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:28,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:49:28,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:49:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4124, Invalid=5382, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:49:28,978 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 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 20:49:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:31,001 INFO L93 Difference]: Finished difference Result 210 states and 217 transitions. [2022-04-06 20:49:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:49:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 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 191 [2022-04-06 20:49:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:31,002 INFO L225 Difference]: With dead ends: 210 [2022-04-06 20:49:31,002 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 20:49:31,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4807 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12312, Invalid=22470, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:49:31,004 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:31,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 29 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 20:49:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-04-06 20:49:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 191 states have internal predecessors, (194), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2022-04-06 20:49:31,028 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 191 [2022-04-06 20:49:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:31,028 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2022-04-06 20:49:31,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 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 20:49:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2022-04-06 20:49:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:49:31,028 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:31,029 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:31,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:31,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:31,246 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash 380234525, now seen corresponding path program 175 times [2022-04-06 20:49:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:31,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2005350301] [2022-04-06 20:49:31,248 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:31,248 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash 380234525, now seen corresponding path program 176 times [2022-04-06 20:49:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:31,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062491460] [2022-04-06 20:49:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:32,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8101 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:32,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062491460] [2022-04-06 20:49:32,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062491460] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475483717] [2022-04-06 20:49:32,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:32,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:32,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:32,932 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:32,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:49:32,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:49:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8101 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:33,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8101 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:40,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475483717] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:40,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:40,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-04-06 20:49:40,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:40,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2005350301] [2022-04-06 20:49:40,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2005350301] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:40,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:40,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:49:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389848536] [2022-04-06 20:49:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:40,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:49:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:49:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16655, Invalid=17017, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:49:40,743 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 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 20:49:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:42,710 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2022-04-06 20:49:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:49:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 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 20:49:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:42,711 INFO L225 Difference]: With dead ends: 212 [2022-04-06 20:49:42,711 INFO L226 Difference]: Without dead ends: 199 [2022-04-06 20:49:42,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=33126, Invalid=41676, Unknown=0, NotChecked=0, Total=74802 [2022-04-06 20:49:42,715 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:42,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 54 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-06 20:49:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-04-06 20:49:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 193 states have internal predecessors, (196), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2022-04-06 20:49:42,721 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 193 [2022-04-06 20:49:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:42,721 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2022-04-06 20:49:42,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 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 20:49:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2022-04-06 20:49:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 20:49:42,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:42,722 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:42,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:42,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-04-06 20:49:42,938 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:42,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:42,938 INFO L85 PathProgramCache]: Analyzing trace with hash -902656070, now seen corresponding path program 177 times [2022-04-06 20:49:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:42,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155768970] [2022-04-06 20:49:42,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:42,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash -902656070, now seen corresponding path program 178 times [2022-04-06 20:49:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:42,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304754739] [2022-04-06 20:49:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:42,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8282 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:44,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:44,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304754739] [2022-04-06 20:49:44,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304754739] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:44,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874497374] [2022-04-06 20:49:44,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:44,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:44,541 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:44,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:49:44,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:44,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:49:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8282 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:44,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8282 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874497374] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:50,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:50,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-04-06 20:49:50,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155768970] [2022-04-06 20:49:50,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155768970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:50,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:50,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:49:50,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771262647] [2022-04-06 20:49:50,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:50,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:49:50,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:49:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 20:49:50,475 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 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 20:49:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:53,087 INFO L93 Difference]: Finished difference Result 214 states and 221 transitions. [2022-04-06 20:49:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:49:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 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 195 [2022-04-06 20:49:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:53,088 INFO L225 Difference]: With dead ends: 214 [2022-04-06 20:49:53,088 INFO L226 Difference]: Without dead ends: 201 [2022-04-06 20:49:53,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 20:49:53,092 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:53,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 44 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-04-06 20:49:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-04-06 20:49:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 195 states have internal predecessors, (198), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2022-04-06 20:49:53,099 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 195 [2022-04-06 20:49:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:53,099 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2022-04-06 20:49:53,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 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 20:49:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2022-04-06 20:49:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:49:53,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:53,100 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:53,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:53,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:53,316 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1104903913, now seen corresponding path program 179 times [2022-04-06 20:49:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692052923] [2022-04-06 20:49:53,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:53,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1104903913, now seen corresponding path program 180 times [2022-04-06 20:49:53,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:53,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048994369] [2022-04-06 20:49:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:53,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8465 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:55,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:55,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048994369] [2022-04-06 20:49:55,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048994369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:55,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940409612] [2022-04-06 20:49:55,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:55,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:55,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:55,371 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:55,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:49:55,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:55,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:49:55,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8465 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:49:55,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8465 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:49:56,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940409612] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:56,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:56,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 5, 5] total 101 [2022-04-06 20:49:56,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692052923] [2022-04-06 20:49:56,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692052923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:56,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:56,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:49:56,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436837672] [2022-04-06 20:49:56,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:56,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:49:56,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:49:56,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=5700, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:49:56,015 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 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 20:49:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:59,329 INFO L93 Difference]: Finished difference Result 216 states and 223 transitions. [2022-04-06 20:49:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:49:59,329 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 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 197 [2022-04-06 20:49:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:59,330 INFO L225 Difference]: With dead ends: 216 [2022-04-06 20:49:59,330 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 20:49:59,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5107 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13140, Invalid=23916, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:49:59,332 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:59,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 34 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:49:59,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 20:49:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-04-06 20:49:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 197 states have internal predecessors, (200), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-04-06 20:49:59,338 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 197 [2022-04-06 20:49:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:59,338 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-04-06 20:49:59,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 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 20:49:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-04-06 20:49:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 20:49:59,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:59,339 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:59,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:59,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:59,540 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:59,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2103414580, now seen corresponding path program 181 times [2022-04-06 20:49:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:59,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424249563] [2022-04-06 20:49:59,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:59,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2103414580, now seen corresponding path program 182 times [2022-04-06 20:49:59,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:59,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811448167] [2022-04-06 20:49:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:59,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:02,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8650 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:02,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:02,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811448167] [2022-04-06 20:50:02,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811448167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:02,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239118122] [2022-04-06 20:50:02,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:02,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:02,164 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:02,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:50:02,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:02,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:02,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 20:50:02,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8650 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:02,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8650 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:07,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239118122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:07,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:07,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-04-06 20:50:07,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:07,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424249563] [2022-04-06 20:50:07,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424249563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:07,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:07,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:50:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394379546] [2022-04-06 20:50:07,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:07,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:50:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:50:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:50:07,482 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 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 20:50:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:09,495 INFO L93 Difference]: Finished difference Result 218 states and 225 transitions. [2022-04-06 20:50:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:50:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 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 199 [2022-04-06 20:50:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:09,496 INFO L225 Difference]: With dead ends: 218 [2022-04-06 20:50:09,496 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 20:50:09,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=35346, Invalid=44460, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 20:50:09,499 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:09,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 49 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 20:50:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-04-06 20:50:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 198 states have (on average 1.02020202020202) internal successors, (202), 199 states have internal predecessors, (202), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-04-06 20:50:09,507 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 199 [2022-04-06 20:50:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:09,507 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-04-06 20:50:09,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 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 20:50:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-04-06 20:50:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 20:50:09,508 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:09,508 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:09,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:09,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:09,723 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1510967825, now seen corresponding path program 183 times [2022-04-06 20:50:09,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1189088582] [2022-04-06 20:50:09,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:09,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1510967825, now seen corresponding path program 184 times [2022-04-06 20:50:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:09,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944034730] [2022-04-06 20:50:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:09,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:11,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:11,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:11,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944034730] [2022-04-06 20:50:11,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944034730] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:11,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803942348] [2022-04-06 20:50:11,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:11,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:11,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:11,350 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:11,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:50:11,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:11,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:50:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:11,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803942348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:16,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-04-06 20:50:16,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1189088582] [2022-04-06 20:50:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1189088582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:16,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 20:50:16,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710163713] [2022-04-06 20:50:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:16,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 20:50:16,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 20:50:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18147, Invalid=18525, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 20:50:16,434 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 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 20:50:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:18,572 INFO L93 Difference]: Finished difference Result 220 states and 227 transitions. [2022-04-06 20:50:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 20:50:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 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 201 [2022-04-06 20:50:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:18,574 INFO L225 Difference]: With dead ends: 220 [2022-04-06 20:50:18,574 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 20:50:18,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=36102, Invalid=45408, Unknown=0, NotChecked=0, Total=81510 [2022-04-06 20:50:18,578 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:18,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 44 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 20:50:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-04-06 20:50:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 200 states have (on average 1.02) internal successors, (204), 201 states have internal predecessors, (204), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-04-06 20:50:18,599 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 201 [2022-04-06 20:50:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:18,599 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-04-06 20:50:18,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 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 20:50:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-04-06 20:50:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:50:18,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:18,601 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:18,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:18,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:18,818 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash -894680658, now seen corresponding path program 185 times [2022-04-06 20:50:18,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:18,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485453295] [2022-04-06 20:50:18,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:18,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:18,819 INFO L85 PathProgramCache]: Analyzing trace with hash -894680658, now seen corresponding path program 186 times [2022-04-06 20:50:18,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045577363] [2022-04-06 20:50:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9026 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045577363] [2022-04-06 20:50:20,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045577363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:20,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417178438] [2022-04-06 20:50:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:20,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:20,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:20,873 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:20,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:50:20,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:20,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:20,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:50:20,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9026 backedges. 95 proven. 1 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 20:50:21,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9026 backedges. 95 proven. 1 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 20:50:21,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417178438] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:21,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:21,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 5, 5] total 104 [2022-04-06 20:50:21,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:21,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485453295] [2022-04-06 20:50:21,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485453295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:21,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:21,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 20:50:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599570766] [2022-04-06 20:50:21,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:21,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 20:50:21,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 20:50:21,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4685, Invalid=6027, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:50:21,361 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 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 20:50:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:24,478 INFO L93 Difference]: Finished difference Result 222 states and 229 transitions. [2022-04-06 20:50:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 20:50:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 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 203 [2022-04-06 20:50:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:24,479 INFO L225 Difference]: With dead ends: 222 [2022-04-06 20:50:24,479 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 20:50:24,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5416 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13995, Invalid=25407, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:50:24,481 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 107 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:24,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 59 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 20:50:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-04-06 20:50:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 203 states have internal predecessors, (206), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2022-04-06 20:50:24,488 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 203 [2022-04-06 20:50:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:24,488 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2022-04-06 20:50:24,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 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 20:50:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2022-04-06 20:50:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 20:50:24,489 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:24,489 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:24,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:24,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 20:50:24,704 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2030467573, now seen corresponding path program 187 times [2022-04-06 20:50:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:24,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689903418] [2022-04-06 20:50:24,707 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:24,707 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2030467573, now seen corresponding path program 188 times [2022-04-06 20:50:24,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:24,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364714729] [2022-04-06 20:50:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:24,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9217 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:27,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364714729] [2022-04-06 20:50:27,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364714729] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:27,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175972043] [2022-04-06 20:50:27,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:27,291 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:27,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:50:27,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:50:27,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9217 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:27,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9217 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:36,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175972043] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:36,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:36,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-04-06 20:50:36,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689903418] [2022-04-06 20:50:36,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689903418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:36,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:36,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 20:50:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465310857] [2022-04-06 20:50:36,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:36,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 20:50:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 20:50:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:50:36,065 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 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 20:50:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:38,570 INFO L93 Difference]: Finished difference Result 224 states and 231 transitions. [2022-04-06 20:50:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 20:50:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 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 205 [2022-04-06 20:50:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:38,571 INFO L225 Difference]: With dead ends: 224 [2022-04-06 20:50:38,571 INFO L226 Difference]: Without dead ends: 211 [2022-04-06 20:50:38,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=37638, Invalid=47334, Unknown=0, NotChecked=0, Total=84972 [2022-04-06 20:50:38,574 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:38,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 34 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-06 20:50:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-04-06 20:50:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 205 states have internal predecessors, (208), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2022-04-06 20:50:38,581 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 205 [2022-04-06 20:50:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:38,581 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2022-04-06 20:50:38,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 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 20:50:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2022-04-06 20:50:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 20:50:38,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:38,582 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:38,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:50:38,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 20:50:38,795 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1694967592, now seen corresponding path program 189 times [2022-04-06 20:50:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:38,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1723092607] [2022-04-06 20:50:38,798 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:38,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1694967592, now seen corresponding path program 190 times [2022-04-06 20:50:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:38,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129191027] [2022-04-06 20:50:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:38,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:41,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9410 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:41,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:41,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129191027] [2022-04-06 20:50:41,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129191027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:41,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646576363] [2022-04-06 20:50:41,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:41,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:41,450 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:41,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:50:41,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:50:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9410 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:41,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9410 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:50,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646576363] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:50,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:50,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-04-06 20:50:50,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:50,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1723092607] [2022-04-06 20:50:50,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1723092607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:50,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:50,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 20:50:50,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453006049] [2022-04-06 20:50:50,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:50,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 20:50:50,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 20:50:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 20:50:50,456 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 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 20:50:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:52,801 INFO L93 Difference]: Finished difference Result 226 states and 233 transitions. [2022-04-06 20:50:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 20:50:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 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 207 [2022-04-06 20:50:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:52,802 INFO L225 Difference]: With dead ends: 226 [2022-04-06 20:50:52,802 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 20:50:52,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=38418, Invalid=48312, Unknown=0, NotChecked=0, Total=86730 [2022-04-06 20:50:52,806 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:52,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 49 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 20:50:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-04-06 20:50:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 207 states have internal predecessors, (210), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2022-04-06 20:50:52,813 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 207 [2022-04-06 20:50:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:52,813 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2022-04-06 20:50:52,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 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 20:50:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2022-04-06 20:50:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:50:52,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:52,814 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:52,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:53,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 20:50:53,027 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash -164563707, now seen corresponding path program 191 times [2022-04-06 20:50:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446698389] [2022-04-06 20:50:53,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:53,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -164563707, now seen corresponding path program 192 times [2022-04-06 20:50:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:53,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486183175] [2022-04-06 20:50:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:54,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9605 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:54,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:54,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486183175] [2022-04-06 20:50:54,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486183175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:54,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906901868] [2022-04-06 20:50:54,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:54,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:54,788 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:54,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:50:54,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:50:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9605 backedges. 98 proven. 1 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 20:50:55,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9605 backedges. 98 proven. 1 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 20:50:55,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906901868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:55,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:55,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-04-06 20:50:55,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446698389] [2022-04-06 20:50:55,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446698389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:55,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:55,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 20:50:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466525512] [2022-04-06 20:50:55,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:55,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 20:50:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:55,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 20:50:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4979, Invalid=6363, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:50:55,288 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 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 20:50:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:58,584 INFO L93 Difference]: Finished difference Result 228 states and 235 transitions. [2022-04-06 20:50:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:50:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 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 209 [2022-04-06 20:50:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:58,585 INFO L225 Difference]: With dead ends: 228 [2022-04-06 20:50:58,586 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 20:50:58,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5734 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14877, Invalid=26943, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:50:58,588 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:58,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 49 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 20:50:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-04-06 20:50:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 209 states have internal predecessors, (212), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-04-06 20:50:58,611 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 209 [2022-04-06 20:50:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:58,612 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-04-06 20:50:58,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 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 20:50:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-04-06 20:50:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 20:50:58,613 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:58,613 INFO L499 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:58,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:58,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:58,835 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash -467746910, now seen corresponding path program 193 times [2022-04-06 20:50:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:58,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107458016] [2022-04-06 20:50:58,836 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:58,836 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash -467746910, now seen corresponding path program 194 times [2022-04-06 20:50:58,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:58,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990714216] [2022-04-06 20:50:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:58,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:01,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9802 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:01,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:01,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990714216] [2022-04-06 20:51:01,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990714216] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:01,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156971628] [2022-04-06 20:51:01,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:01,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:01,856 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:01,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:51:01,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:01,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 20:51:01,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9802 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:02,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9802 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156971628] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:07,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:07,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-04-06 20:51:07,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107458016] [2022-04-06 20:51:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107458016] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:07,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:07,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 20:51:07,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601118592] [2022-04-06 20:51:07,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:07,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 20:51:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 20:51:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:51:07,801 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 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 20:51:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:10,125 INFO L93 Difference]: Finished difference Result 230 states and 237 transitions. [2022-04-06 20:51:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:51:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 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 211 [2022-04-06 20:51:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:10,126 INFO L225 Difference]: With dead ends: 230 [2022-04-06 20:51:10,126 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 20:51:10,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5438 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=40002, Invalid=50298, Unknown=0, NotChecked=0, Total=90300 [2022-04-06 20:51:10,130 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:10,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 49 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 20:51:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-04-06 20:51:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 210 states have (on average 1.019047619047619) internal successors, (214), 211 states have internal predecessors, (214), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2022-04-06 20:51:10,137 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 211 [2022-04-06 20:51:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:10,137 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2022-04-06 20:51:10,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 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 20:51:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2022-04-06 20:51:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 20:51:10,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:10,138 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:10,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:10,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-04-06 20:51:10,354 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:10,354 INFO L85 PathProgramCache]: Analyzing trace with hash 230971135, now seen corresponding path program 195 times [2022-04-06 20:51:10,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:10,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753229685] [2022-04-06 20:51:10,355 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:10,355 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash 230971135, now seen corresponding path program 196 times [2022-04-06 20:51:10,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:10,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379762741] [2022-04-06 20:51:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:10,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10001 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379762741] [2022-04-06 20:51:13,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379762741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689736557] [2022-04-06 20:51:13,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:13,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:13,192 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:13,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:51:13,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:13,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:51:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10001 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:13,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10001 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:20,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689736557] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:20,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:20,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-04-06 20:51:20,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:20,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753229685] [2022-04-06 20:51:20,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753229685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:20,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:20,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:51:20,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129215684] [2022-04-06 20:51:20,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:20,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:51:20,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:20,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:51:20,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-04-06 20:51:20,541 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 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 20:51:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:23,258 INFO L93 Difference]: Finished difference Result 232 states and 239 transitions. [2022-04-06 20:51:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:51:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 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 213 [2022-04-06 20:51:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:23,259 INFO L225 Difference]: With dead ends: 232 [2022-04-06 20:51:23,259 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 20:51:23,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5543 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=40806, Invalid=51306, Unknown=0, NotChecked=0, Total=92112 [2022-04-06 20:51:23,263 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:23,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 34 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 20:51:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-04-06 20:51:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 213 states have internal predecessors, (216), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-04-06 20:51:23,272 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 213 [2022-04-06 20:51:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:23,273 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-04-06 20:51:23,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 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 20:51:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-04-06 20:51:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:51:23,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:23,274 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:23,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:23,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:23,487 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1684114204, now seen corresponding path program 197 times [2022-04-06 20:51:23,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:23,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1864008806] [2022-04-06 20:51:23,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:23,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1684114204, now seen corresponding path program 198 times [2022-04-06 20:51:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:23,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886030020] [2022-04-06 20:51:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:23,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10202 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886030020] [2022-04-06 20:51:25,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886030020] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624217078] [2022-04-06 20:51:25,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:25,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:25,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:25,958 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:25,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:51:26,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:26,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:51:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10202 backedges. 101 proven. 1 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 20:51:26,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10202 backedges. 101 proven. 1 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 20:51:26,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624217078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:26,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:26,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 5, 5] total 110 [2022-04-06 20:51:26,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:26,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1864008806] [2022-04-06 20:51:26,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1864008806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:26,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:26,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 20:51:26,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675904703] [2022-04-06 20:51:26,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:26,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 20:51:26,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 20:51:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5282, Invalid=6708, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:51:26,779 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 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 20:51:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:29,329 INFO L93 Difference]: Finished difference Result 234 states and 241 transitions. [2022-04-06 20:51:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 20:51:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 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 215 [2022-04-06 20:51:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:29,330 INFO L225 Difference]: With dead ends: 234 [2022-04-06 20:51:29,330 INFO L226 Difference]: Without dead ends: 221 [2022-04-06 20:51:29,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6061 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15786, Invalid=28524, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:51:29,332 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:29,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 29 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-04-06 20:51:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-04-06 20:51:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 215 states have internal predecessors, (218), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2022-04-06 20:51:29,339 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 215 [2022-04-06 20:51:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:29,339 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2022-04-06 20:51:29,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 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 20:51:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2022-04-06 20:51:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 20:51:29,340 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:29,340 INFO L499 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:29,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 20:51:29,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:51:29,555 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2004734983, now seen corresponding path program 199 times [2022-04-06 20:51:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1050075450] [2022-04-06 20:51:29,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:29,556 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:29,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2004734983, now seen corresponding path program 200 times [2022-04-06 20:51:29,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:29,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308324878] [2022-04-06 20:51:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:32,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10405 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308324878] [2022-04-06 20:51:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308324878] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684143378] [2022-04-06 20:51:32,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:32,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:32,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:32,288 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:32,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:51:32,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:32,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:51:32,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10405 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:32,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10405 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:38,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684143378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:38,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:38,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-04-06 20:51:38,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:38,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1050075450] [2022-04-06 20:51:38,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1050075450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:38,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:38,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 20:51:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241585217] [2022-04-06 20:51:38,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:38,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 20:51:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 20:51:38,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21323, Invalid=21733, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:51:38,287 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 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 20:51:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:40,739 INFO L93 Difference]: Finished difference Result 236 states and 243 transitions. [2022-04-06 20:51:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 20:51:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 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 217 [2022-04-06 20:51:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:40,743 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:51:40,743 INFO L226 Difference]: Without dead ends: 223 [2022-04-06 20:51:40,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=42438, Invalid=53352, Unknown=0, NotChecked=0, Total=95790 [2022-04-06 20:51:40,748 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:40,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 59 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:40,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-04-06 20:51:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-04-06 20:51:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 217 states have internal predecessors, (220), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2022-04-06 20:51:40,763 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 217 [2022-04-06 20:51:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:40,763 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2022-04-06 20:51:40,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 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 20:51:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2022-04-06 20:51:40,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 20:51:40,765 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:40,765 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:40,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:40,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:40,981 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash 654182806, now seen corresponding path program 201 times [2022-04-06 20:51:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892695697] [2022-04-06 20:51:40,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:40,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash 654182806, now seen corresponding path program 202 times [2022-04-06 20:51:40,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:40,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073463067] [2022-04-06 20:51:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:40,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:44,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10610 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:44,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073463067] [2022-04-06 20:51:44,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073463067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772194130] [2022-04-06 20:51:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:44,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:44,151 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:44,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:51:44,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:44,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:51:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10610 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10610 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772194130] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:51,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:51,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-04-06 20:51:51,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:51,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892695697] [2022-04-06 20:51:51,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892695697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:51,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:51,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 20:51:51,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359682279] [2022-04-06 20:51:51,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:51,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 20:51:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 20:51:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21738, Invalid=22152, Unknown=0, NotChecked=0, Total=43890 [2022-04-06 20:51:51,869 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 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 20:51:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:54,362 INFO L93 Difference]: Finished difference Result 238 states and 245 transitions. [2022-04-06 20:51:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 20:51:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 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 20:51:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:54,363 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:51:54,363 INFO L226 Difference]: Without dead ends: 225 [2022-04-06 20:51:54,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=43266, Invalid=54390, Unknown=0, NotChecked=0, Total=97656 [2022-04-06 20:51:54,366 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:54,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 29 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-04-06 20:51:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-04-06 20:51:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 218 states have (on average 1.018348623853211) internal successors, (222), 219 states have internal predecessors, (222), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-04-06 20:51:54,373 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 219 [2022-04-06 20:51:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:54,373 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-04-06 20:51:54,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 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 20:51:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-04-06 20:51:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:51:54,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:54,374 INFO L499 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:54,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:54,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-04-06 20:51:54,591 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:54,592 INFO L85 PathProgramCache]: Analyzing trace with hash 368636915, now seen corresponding path program 203 times [2022-04-06 20:51:54,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:54,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [461095629] [2022-04-06 20:51:54,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:54,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash 368636915, now seen corresponding path program 204 times [2022-04-06 20:51:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:54,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003871259] [2022-04-06 20:51:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:54,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:56,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10817 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:56,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003871259] [2022-04-06 20:51:56,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003871259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537581] [2022-04-06 20:51:56,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:56,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:56,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:56,569 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:56,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:51:56,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:56,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:56,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:51:56,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10817 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 20:51:56,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10817 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 20:51:57,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:57,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:57,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 5, 5] total 113 [2022-04-06 20:51:57,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [461095629] [2022-04-06 20:51:57,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [461095629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:57,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:57,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 20:51:57,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447885076] [2022-04-06 20:51:57,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:57,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 20:51:57,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 20:51:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5594, Invalid=7062, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:51:57,067 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 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 20:51:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:59,783 INFO L93 Difference]: Finished difference Result 240 states and 247 transitions. [2022-04-06 20:51:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 20:51:59,783 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 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 221 [2022-04-06 20:51:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:59,784 INFO L225 Difference]: With dead ends: 240 [2022-04-06 20:51:59,784 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 20:51:59,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6397 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=16722, Invalid=30150, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:51:59,787 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:59,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 39 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 20:51:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-04-06 20:51:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 220 states have (on average 1.018181818181818) internal successors, (224), 221 states have internal predecessors, (224), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2022-04-06 20:51:59,827 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 221 [2022-04-06 20:51:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:59,827 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2022-04-06 20:51:59,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 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 20:51:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2022-04-06 20:51:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 20:51:59,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:59,828 INFO L499 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:59,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:00,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:00,043 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash 836942608, now seen corresponding path program 205 times [2022-04-06 20:52:00,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:00,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226385375] [2022-04-06 20:52:00,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:00,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash 836942608, now seen corresponding path program 206 times [2022-04-06 20:52:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:00,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425649764] [2022-04-06 20:52:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:02,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:02,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425649764] [2022-04-06 20:52:02,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425649764] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:02,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226527942] [2022-04-06 20:52:02,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:02,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:02,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:02,107 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:02,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:52:02,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 20:52:02,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:02,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:10,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226527942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:10,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:10,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-04-06 20:52:10,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226385375] [2022-04-06 20:52:10,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226385375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:10,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:10,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 20:52:10,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219118533] [2022-04-06 20:52:10,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:10,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 20:52:10,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 20:52:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:52:10,773 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 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 20:52:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:13,777 INFO L93 Difference]: Finished difference Result 242 states and 249 transitions. [2022-04-06 20:52:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 20:52:13,777 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 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 223 [2022-04-06 20:52:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:13,778 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:52:13,778 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 20:52:13,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=44946, Invalid=56496, Unknown=0, NotChecked=0, Total=101442 [2022-04-06 20:52:13,782 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:13,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 54 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 20:52:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-04-06 20:52:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 222 states have (on average 1.018018018018018) internal successors, (226), 223 states have internal predecessors, (226), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2022-04-06 20:52:13,788 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 223 [2022-04-06 20:52:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:13,789 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2022-04-06 20:52:13,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 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 20:52:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2022-04-06 20:52:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 20:52:13,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:13,789 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:13,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:52:14,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:14,005 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash -92852499, now seen corresponding path program 207 times [2022-04-06 20:52:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:14,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600739672] [2022-04-06 20:52:14,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:14,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:14,007 INFO L85 PathProgramCache]: Analyzing trace with hash -92852499, now seen corresponding path program 208 times [2022-04-06 20:52:14,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:14,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221878252] [2022-04-06 20:52:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:14,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:16,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11237 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221878252] [2022-04-06 20:52:16,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221878252] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014437317] [2022-04-06 20:52:16,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:16,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:16,055 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:16,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:52:16,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:52:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11237 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:16,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11237 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:22,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014437317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:22,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:22,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 216 [2022-04-06 20:52:22,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:22,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600739672] [2022-04-06 20:52:22,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600739672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:22,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:22,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 20:52:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863837842] [2022-04-06 20:52:22,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:22,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 20:52:22,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:22,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 20:52:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23007, Invalid=23433, Unknown=0, NotChecked=0, Total=46440 [2022-04-06 20:52:22,437 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 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 20:52:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:25,009 INFO L93 Difference]: Finished difference Result 244 states and 251 transitions. [2022-04-06 20:52:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 20:52:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 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 225 [2022-04-06 20:52:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:25,010 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:52:25,010 INFO L226 Difference]: Without dead ends: 231 [2022-04-06 20:52:25,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6194 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=45798, Invalid=57564, Unknown=0, NotChecked=0, Total=103362 [2022-04-06 20:52:25,016 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:25,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 49 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-04-06 20:52:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-04-06 20:52:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 225 states have internal predecessors, (228), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2022-04-06 20:52:25,035 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 225 [2022-04-06 20:52:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:25,035 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2022-04-06 20:52:25,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 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 20:52:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2022-04-06 20:52:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:52:25,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:25,036 INFO L499 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:25,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:25,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-04-06 20:52:25,252 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:25,252 INFO L85 PathProgramCache]: Analyzing trace with hash -272752758, now seen corresponding path program 209 times [2022-04-06 20:52:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:25,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514702688] [2022-04-06 20:52:25,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:25,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash -272752758, now seen corresponding path program 210 times [2022-04-06 20:52:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:25,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051504113] [2022-04-06 20:52:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:27,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:27,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:27,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051504113] [2022-04-06 20:52:27,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051504113] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:27,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905908726] [2022-04-06 20:52:27,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:27,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:27,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:27,329 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:27,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:52:27,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:52:27,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:52:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 107 proven. 1 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:52:27,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 107 proven. 1 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:52:27,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905908726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:27,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:27,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 5, 5] total 116 [2022-04-06 20:52:27,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514702688] [2022-04-06 20:52:27,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514702688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:27,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:27,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 20:52:27,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788664046] [2022-04-06 20:52:27,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:27,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 20:52:27,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 20:52:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5915, Invalid=7425, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:52:27,854 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 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 20:52:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:30,481 INFO L93 Difference]: Finished difference Result 246 states and 253 transitions. [2022-04-06 20:52:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 20:52:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 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 227 [2022-04-06 20:52:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:30,482 INFO L225 Difference]: With dead ends: 246 [2022-04-06 20:52:30,482 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 20:52:30,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6742 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=17685, Invalid=31821, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:52:30,485 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 119 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:30,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 44 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 20:52:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-04-06 20:52:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 227 states have internal predecessors, (230), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2022-04-06 20:52:30,492 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 227 [2022-04-06 20:52:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:30,492 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2022-04-06 20:52:30,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 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 20:52:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2022-04-06 20:52:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 20:52:30,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:30,493 INFO L499 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:30,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:30,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:30,708 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1358209817, now seen corresponding path program 211 times [2022-04-06 20:52:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057749899] [2022-04-06 20:52:30,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:30,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1358209817, now seen corresponding path program 212 times [2022-04-06 20:52:30,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:30,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971961643] [2022-04-06 20:52:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:30,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:32,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11665 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:32,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971961643] [2022-04-06 20:52:32,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971961643] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:32,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158595104] [2022-04-06 20:52:32,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:32,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:32,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:32,885 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:32,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:52:32,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:32,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:52:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11665 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:33,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11665 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:39,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158595104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:39,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:39,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 220 [2022-04-06 20:52:39,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:39,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057749899] [2022-04-06 20:52:39,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057749899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:39,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:39,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 20:52:39,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268555808] [2022-04-06 20:52:39,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:39,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 20:52:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 20:52:39,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23873, Invalid=24307, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:52:39,530 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 20:52:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:42,609 INFO L93 Difference]: Finished difference Result 248 states and 255 transitions. [2022-04-06 20:52:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 20:52:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 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 229 [2022-04-06 20:52:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:42,610 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:52:42,610 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 20:52:42,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=47526, Invalid=59730, Unknown=0, NotChecked=0, Total=107256 [2022-04-06 20:52:42,614 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:42,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 54 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 20:52:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-04-06 20:52:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 229 states have internal predecessors, (232), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-04-06 20:52:42,621 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 229 [2022-04-06 20:52:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:42,622 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-04-06 20:52:42,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 20:52:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-04-06 20:52:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 20:52:42,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:42,622 INFO L499 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:42,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 20:52:42,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:42,833 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash -805390588, now seen corresponding path program 213 times [2022-04-06 20:52:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423542907] [2022-04-06 20:52:42,835 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:42,835 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash -805390588, now seen corresponding path program 214 times [2022-04-06 20:52:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:42,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214591528] [2022-04-06 20:52:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:46,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11882 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:46,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214591528] [2022-04-06 20:52:46,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214591528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:46,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813611304] [2022-04-06 20:52:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:46,150 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:46,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:52:46,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:46,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 20:52:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11882 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:46,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11882 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:52:54,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813611304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:54,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:54,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 222 [2022-04-06 20:52:54,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423542907] [2022-04-06 20:52:54,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423542907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:54,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:54,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 20:52:54,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535474750] [2022-04-06 20:52:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:54,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 20:52:54,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 20:52:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24312, Invalid=24750, Unknown=0, NotChecked=0, Total=49062 [2022-04-06 20:52:54,804 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 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 20:52:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:58,342 INFO L93 Difference]: Finished difference Result 250 states and 257 transitions. [2022-04-06 20:52:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 20:52:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 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 231 [2022-04-06 20:52:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:58,343 INFO L225 Difference]: With dead ends: 250 [2022-04-06 20:52:58,343 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 20:52:58,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6533 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=48402, Invalid=60828, Unknown=0, NotChecked=0, Total=109230 [2022-04-06 20:52:58,347 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:58,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 49 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:52:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 20:52:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-04-06 20:52:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 230 states have (on average 1.017391304347826) internal successors, (234), 231 states have internal predecessors, (234), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2022-04-06 20:52:58,354 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 231 [2022-04-06 20:52:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:58,354 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2022-04-06 20:52:58,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 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 20:52:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2022-04-06 20:52:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:52:58,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:58,356 INFO L499 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:58,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:58,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:58,569 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2122056223, now seen corresponding path program 215 times [2022-04-06 20:52:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43432955] [2022-04-06 20:52:58,571 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:58,571 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2122056223, now seen corresponding path program 216 times [2022-04-06 20:52:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:58,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089883832] [2022-04-06 20:52:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:58,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:01,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12101 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:01,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089883832] [2022-04-06 20:53:01,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089883832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164126194] [2022-04-06 20:53:01,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:01,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:01,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:01,020 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:01,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:53:01,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:53:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:53:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12101 backedges. 110 proven. 1 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:53:01,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12101 backedges. 110 proven. 1 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:53:01,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164126194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:01,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:01,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 5, 5] total 119 [2022-04-06 20:53:01,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:01,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43432955] [2022-04-06 20:53:01,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43432955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:01,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:01,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 20:53:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259716167] [2022-04-06 20:53:01,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:01,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 20:53:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:01,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 20:53:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6245, Invalid=7797, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:53:01,568 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 3 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 20:53:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:04,692 INFO L93 Difference]: Finished difference Result 252 states and 259 transitions. [2022-04-06 20:53:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-04-06 20:53:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 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 233 [2022-04-06 20:53:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:04,693 INFO L225 Difference]: With dead ends: 252 [2022-04-06 20:53:04,693 INFO L226 Difference]: Without dead ends: 239 [2022-04-06 20:53:04,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7096 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=18675, Invalid=33537, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:53:04,695 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:04,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:53:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-06 20:53:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-04-06 20:53:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 232 states have (on average 1.0172413793103448) internal successors, (236), 233 states have internal predecessors, (236), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2022-04-06 20:53:04,702 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 233 [2022-04-06 20:53:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:04,702 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2022-04-06 20:53:04,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 3 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 20:53:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2022-04-06 20:53:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-04-06 20:53:04,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:04,703 INFO L499 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:04,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:04,904 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-04-06 20:53:04,904 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -422379138, now seen corresponding path program 217 times [2022-04-06 20:53:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:04,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [622961381] [2022-04-06 20:53:04,905 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:04,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:04,905 INFO L85 PathProgramCache]: Analyzing trace with hash -422379138, now seen corresponding path program 218 times [2022-04-06 20:53:04,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:04,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880888805] [2022-04-06 20:53:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:04,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:08,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12322 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:08,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880888805] [2022-04-06 20:53:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880888805] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264035457] [2022-04-06 20:53:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:08,095 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:08,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:53:08,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-06 20:53:08,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12322 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:08,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12322 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:18,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264035457] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:18,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:18,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 113, 113] total 226 [2022-04-06 20:53:18,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:18,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [622961381] [2022-04-06 20:53:18,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [622961381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:18,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:18,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-04-06 20:53:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488507085] [2022-04-06 20:53:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:18,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-04-06 20:53:18,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:18,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-04-06 20:53:18,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25202, Invalid=25648, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 20:53:18,321 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 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 20:53:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:21,394 INFO L93 Difference]: Finished difference Result 254 states and 261 transitions. [2022-04-06 20:53:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-06 20:53:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 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 235 [2022-04-06 20:53:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:21,395 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:53:21,395 INFO L226 Difference]: Without dead ends: 241 [2022-04-06 20:53:21,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=50178, Invalid=63054, Unknown=0, NotChecked=0, Total=113232 [2022-04-06 20:53:21,400 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:21,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 54 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:53:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-04-06 20:53:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-04-06 20:53:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 234 states have (on average 1.017094017094017) internal successors, (238), 235 states have internal predecessors, (238), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2022-04-06 20:53:21,407 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 235 [2022-04-06 20:53:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:21,407 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2022-04-06 20:53:21,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 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 20:53:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2022-04-06 20:53:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-04-06 20:53:21,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:21,408 INFO L499 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:21,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-06 20:53:21,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:53:21,616 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 879727067, now seen corresponding path program 219 times [2022-04-06 20:53:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139753062] [2022-04-06 20:53:21,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:21,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash 879727067, now seen corresponding path program 220 times [2022-04-06 20:53:21,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121452325] [2022-04-06 20:53:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:25,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12545 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:25,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121452325] [2022-04-06 20:53:25,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121452325] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522889945] [2022-04-06 20:53:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:25,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:25,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:25,301 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:53:25,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:25,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 20:53:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12545 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:25,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12545 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:35,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522889945] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:35,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 114] total 228 [2022-04-06 20:53:35,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139753062] [2022-04-06 20:53:35,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139753062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:35,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-04-06 20:53:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136138942] [2022-04-06 20:53:35,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:35,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-04-06 20:53:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-04-06 20:53:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25653, Invalid=26103, Unknown=0, NotChecked=0, Total=51756 [2022-04-06 20:53:35,528 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 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 20:53:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:38,358 INFO L93 Difference]: Finished difference Result 256 states and 263 transitions. [2022-04-06 20:53:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-04-06 20:53:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 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 237 [2022-04-06 20:53:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:38,359 INFO L225 Difference]: With dead ends: 256 [2022-04-06 20:53:38,359 INFO L226 Difference]: Without dead ends: 243 [2022-04-06 20:53:38,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=51078, Invalid=64182, Unknown=0, NotChecked=0, Total=115260 [2022-04-06 20:53:38,364 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:38,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 39 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:53:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-06 20:53:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-04-06 20:53:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 236 states have (on average 1.0169491525423728) internal successors, (240), 237 states have internal predecessors, (240), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-04-06 20:53:38,371 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 237 [2022-04-06 20:53:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:38,371 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-04-06 20:53:38,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 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 20:53:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-04-06 20:53:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:53:38,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:38,372 INFO L499 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:38,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:38,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:53:38,588 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1926660360, now seen corresponding path program 221 times [2022-04-06 20:53:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:38,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076204897] [2022-04-06 20:53:38,590 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:38,590 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1926660360, now seen corresponding path program 222 times [2022-04-06 20:53:38,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:38,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962377858] [2022-04-06 20:53:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:40,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12770 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:40,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:40,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962377858] [2022-04-06 20:53:40,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962377858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:40,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593690402] [2022-04-06 20:53:40,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:40,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:40,878 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:40,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:53:40,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:53:40,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:53:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12770 backedges. 113 proven. 1 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:53:41,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12770 backedges. 113 proven. 1 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:53:41,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593690402] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:41,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:41,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 5, 5] total 122 [2022-04-06 20:53:41,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:41,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076204897] [2022-04-06 20:53:41,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076204897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:41,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:41,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-04-06 20:53:41,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468120449] [2022-04-06 20:53:41,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:41,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-04-06 20:53:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:41,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-04-06 20:53:41,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6584, Invalid=8178, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:53:41,621 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 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 20:53:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:45,472 INFO L93 Difference]: Finished difference Result 258 states and 265 transitions. [2022-04-06 20:53:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-04-06 20:53:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 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 239 [2022-04-06 20:53:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:45,473 INFO L225 Difference]: With dead ends: 258 [2022-04-06 20:53:45,473 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 20:53:45,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7459 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=19692, Invalid=35298, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 20:53:45,475 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 125 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:45,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 54 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 20:53:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-04-06 20:53:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 239 states have internal predecessors, (242), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-04-06 20:53:45,482 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 239 [2022-04-06 20:53:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:45,482 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-04-06 20:53:45,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 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 20:53:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-04-06 20:53:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-04-06 20:53:45,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:45,483 INFO L499 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:45,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:45,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 20:53:45,698 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1625515819, now seen corresponding path program 223 times [2022-04-06 20:53:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:45,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1348902927] [2022-04-06 20:53:45,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:45,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1625515819, now seen corresponding path program 224 times [2022-04-06 20:53:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:45,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028684240] [2022-04-06 20:53:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:48,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:48,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028684240] [2022-04-06 20:53:48,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028684240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178758088] [2022-04-06 20:53:48,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:48,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:48,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:48,660 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:48,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:53:48,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:48,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 20:53:48,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:48,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:53:56,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178758088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:56,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:56,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 232 [2022-04-06 20:53:56,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:56,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1348902927] [2022-04-06 20:53:56,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1348902927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:56,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:56,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-04-06 20:53:56,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826429762] [2022-04-06 20:53:56,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:56,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-06 20:53:56,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:56,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-06 20:53:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26567, Invalid=27025, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:53:56,684 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 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 20:54:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:00,201 INFO L93 Difference]: Finished difference Result 260 states and 267 transitions. [2022-04-06 20:54:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-04-06 20:54:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 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 241 [2022-04-06 20:54:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:00,202 INFO L225 Difference]: With dead ends: 260 [2022-04-06 20:54:00,202 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 20:54:00,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7118 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=52902, Invalid=66468, Unknown=0, NotChecked=0, Total=119370 [2022-04-06 20:54:00,206 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:00,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 49 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 20:54:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-04-06 20:54:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 241 states have internal predecessors, (244), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 250 transitions. [2022-04-06 20:54:00,214 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 250 transitions. Word has length 241 [2022-04-06 20:54:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:00,214 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 250 transitions. [2022-04-06 20:54:00,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 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 20:54:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 250 transitions. [2022-04-06 20:54:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-04-06 20:54:00,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:00,215 INFO L499 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:00,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:00,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:00,431 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:00,431 INFO L85 PathProgramCache]: Analyzing trace with hash 11579250, now seen corresponding path program 225 times [2022-04-06 20:54:00,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:00,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1433986875] [2022-04-06 20:54:00,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:00,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 11579250, now seen corresponding path program 226 times [2022-04-06 20:54:00,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:00,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090154074] [2022-04-06 20:54:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:00,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:02,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13226 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:02,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090154074] [2022-04-06 20:54:02,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090154074] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573728925] [2022-04-06 20:54:02,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:02,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:02,910 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:02,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:54:02,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 20:54:02,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13226 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:03,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13226 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:12,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573728925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:12,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:12,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 117, 117] total 234 [2022-04-06 20:54:12,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:12,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1433986875] [2022-04-06 20:54:12,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1433986875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:12,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:12,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-04-06 20:54:12,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653230585] [2022-04-06 20:54:12,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:12,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-04-06 20:54:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-04-06 20:54:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27030, Invalid=27492, Unknown=0, NotChecked=0, Total=54522 [2022-04-06 20:54:12,241 INFO L87 Difference]: Start difference. First operand 247 states and 250 transitions. Second operand has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 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 20:54:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:15,237 INFO L93 Difference]: Finished difference Result 262 states and 269 transitions. [2022-04-06 20:54:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-04-06 20:54:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 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 243 [2022-04-06 20:54:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:15,239 INFO L225 Difference]: With dead ends: 262 [2022-04-06 20:54:15,239 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 20:54:15,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=53826, Invalid=67626, Unknown=0, NotChecked=0, Total=121452 [2022-04-06 20:54:15,243 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:15,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 49 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 20:54:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-04-06 20:54:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 243 states have internal predecessors, (246), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 252 transitions. [2022-04-06 20:54:15,250 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 252 transitions. Word has length 243 [2022-04-06 20:54:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:15,250 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 252 transitions. [2022-04-06 20:54:15,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 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 20:54:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 252 transitions. [2022-04-06 20:54:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 20:54:15,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:15,251 INFO L499 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:15,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:15,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:15,467 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1301910223, now seen corresponding path program 227 times [2022-04-06 20:54:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142395315] [2022-04-06 20:54:15,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:15,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1301910223, now seen corresponding path program 228 times [2022-04-06 20:54:15,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:15,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267933335] [2022-04-06 20:54:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13457 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:17,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267933335] [2022-04-06 20:54:17,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267933335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:17,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463908662] [2022-04-06 20:54:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:17,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:17,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:17,815 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:17,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:54:17,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:54:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:17,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:54:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13457 backedges. 116 proven. 1 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2022-04-06 20:54:18,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13457 backedges. 116 proven. 1 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2022-04-06 20:54:18,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463908662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:18,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:18,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 5, 5] total 125 [2022-04-06 20:54:18,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142395315] [2022-04-06 20:54:18,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142395315] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:18,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:18,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-04-06 20:54:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854045693] [2022-04-06 20:54:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:18,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-04-06 20:54:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-04-06 20:54:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6932, Invalid=8568, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:54:18,367 INFO L87 Difference]: Start difference. First operand 249 states and 252 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 3 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 20:54:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:21,624 INFO L93 Difference]: Finished difference Result 264 states and 271 transitions. [2022-04-06 20:54:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-04-06 20:54:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 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 20:54:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:21,625 INFO L225 Difference]: With dead ends: 264 [2022-04-06 20:54:21,625 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 20:54:21,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7831 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=20736, Invalid=37104, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 20:54:21,628 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 128 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:21,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 49 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 20:54:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-04-06 20:54:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 244 states have (on average 1.0163934426229508) internal successors, (248), 245 states have internal predecessors, (248), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2022-04-06 20:54:21,635 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 245 [2022-04-06 20:54:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:21,635 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2022-04-06 20:54:21,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 3 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 20:54:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2022-04-06 20:54:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-04-06 20:54:21,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:21,636 INFO L499 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:21,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:21,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-04-06 20:54:21,852 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 64426732, now seen corresponding path program 229 times [2022-04-06 20:54:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1685909306] [2022-04-06 20:54:21,853 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:21,853 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash 64426732, now seen corresponding path program 230 times [2022-04-06 20:54:21,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:21,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804892029] [2022-04-06 20:54:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:21,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:24,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:24,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:24,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804892029] [2022-04-06 20:54:24,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804892029] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674651668] [2022-04-06 20:54:24,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:24,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:24,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:24,838 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:24,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:54:24,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:24,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:24,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 20:54:24,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:25,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:32,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674651668] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:32,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:32,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 119, 119] total 238 [2022-04-06 20:54:32,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1685909306] [2022-04-06 20:54:32,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1685909306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:32,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:32,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-04-06 20:54:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249150763] [2022-04-06 20:54:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:32,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-04-06 20:54:32,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-04-06 20:54:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27968, Invalid=28438, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:54:32,488 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 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 20:54:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:35,614 INFO L93 Difference]: Finished difference Result 266 states and 273 transitions. [2022-04-06 20:54:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 20:54:35,615 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 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 247 [2022-04-06 20:54:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:35,615 INFO L225 Difference]: With dead ends: 266 [2022-04-06 20:54:35,615 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 20:54:35,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7481 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=55698, Invalid=69972, Unknown=0, NotChecked=0, Total=125670 [2022-04-06 20:54:35,619 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:35,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 59 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 20:54:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-04-06 20:54:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 246 states have (on average 1.016260162601626) internal successors, (250), 247 states have internal predecessors, (250), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 256 transitions. [2022-04-06 20:54:35,626 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 256 transitions. Word has length 247 [2022-04-06 20:54:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:35,627 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 256 transitions. [2022-04-06 20:54:35,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 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 20:54:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 256 transitions. [2022-04-06 20:54:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-04-06 20:54:35,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:35,627 INFO L499 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:35,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:35,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:35,844 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 548732873, now seen corresponding path program 231 times [2022-04-06 20:54:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176866995] [2022-04-06 20:54:35,845 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:35,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:35,845 INFO L85 PathProgramCache]: Analyzing trace with hash 548732873, now seen corresponding path program 232 times [2022-04-06 20:54:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:35,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110147114] [2022-04-06 20:54:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:35,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:38,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13925 backedges. 118 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:38,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:38,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110147114] [2022-04-06 20:54:38,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110147114] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:38,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410221951] [2022-04-06 20:54:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:38,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:38,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:38,284 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:38,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 20:54:38,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:38,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 20:54:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13925 backedges. 118 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:38,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13925 backedges. 118 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:45,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410221951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:45,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:45,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 120, 120] total 240 [2022-04-06 20:54:45,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176866995] [2022-04-06 20:54:45,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176866995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:45,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:45,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-04-06 20:54:45,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543566806] [2022-04-06 20:54:45,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:45,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-04-06 20:54:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:45,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-04-06 20:54:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28443, Invalid=28917, Unknown=0, NotChecked=0, Total=57360 [2022-04-06 20:54:45,923 INFO L87 Difference]: Start difference. First operand 253 states and 256 transitions. Second operand has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 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 20:54:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:49,007 INFO L93 Difference]: Finished difference Result 268 states and 275 transitions. [2022-04-06 20:54:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-04-06 20:54:49,008 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 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 249 [2022-04-06 20:54:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:49,008 INFO L225 Difference]: With dead ends: 268 [2022-04-06 20:54:49,008 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 20:54:49,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7604 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=56646, Invalid=71160, Unknown=0, NotChecked=0, Total=127806 [2022-04-06 20:54:49,012 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:49,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 29 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 20:54:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-04-06 20:54:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 248 states have (on average 1.0161290322580645) internal successors, (252), 249 states have internal predecessors, (252), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-04-06 20:54:49,021 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 249 [2022-04-06 20:54:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:49,022 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-04-06 20:54:49,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 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 20:54:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-04-06 20:54:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 20:54:49,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:49,023 INFO L499 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:49,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:49,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:49,235 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2110466406, now seen corresponding path program 233 times [2022-04-06 20:54:49,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:49,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [250935344] [2022-04-06 20:54:49,237 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:49,237 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2110466406, now seen corresponding path program 234 times [2022-04-06 20:54:49,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:49,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6317092] [2022-04-06 20:54:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:49,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:52,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 119 proven. 14042 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:52,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6317092] [2022-04-06 20:54:52,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6317092] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785257301] [2022-04-06 20:54:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:52,044 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:52,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 20:54:52,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:54:52,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:52,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:54:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 119 proven. 1 refuted. 0 times theorem prover too weak. 14042 trivial. 0 not checked. [2022-04-06 20:54:52,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 119 proven. 1 refuted. 0 times theorem prover too weak. 14042 trivial. 0 not checked. [2022-04-06 20:54:52,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785257301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:52,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:52,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 5, 5] total 128 [2022-04-06 20:54:52,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:52,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [250935344] [2022-04-06 20:54:52,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [250935344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:52,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:52,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-04-06 20:54:52,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691088319] [2022-04-06 20:54:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:52,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-04-06 20:54:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-04-06 20:54:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7289, Invalid=8967, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:54:52,598 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 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 20:54:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:55,776 INFO L93 Difference]: Finished difference Result 270 states and 277 transitions. [2022-04-06 20:54:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-04-06 20:54:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 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 251 [2022-04-06 20:54:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:55,777 INFO L225 Difference]: With dead ends: 270 [2022-04-06 20:54:55,777 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 20:54:55,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8212 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=21807, Invalid=38955, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 20:54:55,780 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:55,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 49 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 20:54:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-04-06 20:54:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 250 states have (on average 1.016) internal successors, (254), 251 states have internal predecessors, (254), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 260 transitions. [2022-04-06 20:54:55,788 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 260 transitions. Word has length 251 [2022-04-06 20:54:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:55,788 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 260 transitions. [2022-04-06 20:54:55,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 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 20:54:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 260 transitions. [2022-04-06 20:54:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-04-06 20:54:55,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:55,789 INFO L499 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:55,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:56,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-04-06 20:54:56,002 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash -302161981, now seen corresponding path program 235 times [2022-04-06 20:54:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:56,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [258848698] [2022-04-06 20:54:56,003 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:56,003 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash -302161981, now seen corresponding path program 236 times [2022-04-06 20:54:56,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:56,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623891207] [2022-04-06 20:54:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:58,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14401 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:58,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:58,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623891207] [2022-04-06 20:54:58,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623891207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:58,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500880960] [2022-04-06 20:54:58,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:58,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:58,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:58,491 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:58,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 20:54:58,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:58,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 20:54:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14401 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:54:58,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14401 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:06,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500880960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:06,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:06,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 122, 122] total 244 [2022-04-06 20:55:06,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [258848698] [2022-04-06 20:55:06,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [258848698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:06,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:06,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-04-06 20:55:06,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049893598] [2022-04-06 20:55:06,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:06,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-04-06 20:55:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-04-06 20:55:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29405, Invalid=29887, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 20:55:06,535 INFO L87 Difference]: Start difference. First operand 257 states and 260 transitions. Second operand has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 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 20:55:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:09,731 INFO L93 Difference]: Finished difference Result 272 states and 279 transitions. [2022-04-06 20:55:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-04-06 20:55:09,732 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 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 253 [2022-04-06 20:55:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:09,732 INFO L225 Difference]: With dead ends: 272 [2022-04-06 20:55:09,732 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 20:55:09,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7853 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=58566, Invalid=73566, Unknown=0, NotChecked=0, Total=132132 [2022-04-06 20:55:09,737 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:09,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 39 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:55:09,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 20:55:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-04-06 20:55:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 253 states have internal predecessors, (256), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 262 transitions. [2022-04-06 20:55:09,745 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 262 transitions. Word has length 253 [2022-04-06 20:55:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:09,745 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 262 transitions. [2022-04-06 20:55:09,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 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 20:55:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 262 transitions. [2022-04-06 20:55:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-04-06 20:55:09,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:09,746 INFO L499 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:09,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-04-06 20:55:09,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 20:55:09,959 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:09,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash 444297952, now seen corresponding path program 237 times [2022-04-06 20:55:09,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:09,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122225413] [2022-04-06 20:55:09,961 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:09,961 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash 444297952, now seen corresponding path program 238 times [2022-04-06 20:55:09,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697947590] [2022-04-06 20:55:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:09,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:13,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14642 backedges. 121 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:13,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697947590] [2022-04-06 20:55:13,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697947590] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631312820] [2022-04-06 20:55:13,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:13,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:13,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:13,213 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:13,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 20:55:13,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 122 conjunts are in the unsatisfiable core [2022-04-06 20:55:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14642 backedges. 121 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:13,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14642 backedges. 121 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:22,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631312820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:22,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:22,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 123, 123] total 246 [2022-04-06 20:55:22,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:22,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122225413] [2022-04-06 20:55:22,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122225413] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:22,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:22,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-04-06 20:55:22,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052611785] [2022-04-06 20:55:22,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:22,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-04-06 20:55:22,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-04-06 20:55:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29892, Invalid=30378, Unknown=0, NotChecked=0, Total=60270 [2022-04-06 20:55:22,374 INFO L87 Difference]: Start difference. First operand 259 states and 262 transitions. Second operand has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 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 20:55:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:26,573 INFO L93 Difference]: Finished difference Result 274 states and 281 transitions. [2022-04-06 20:55:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-04-06 20:55:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 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 255 [2022-04-06 20:55:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:26,574 INFO L225 Difference]: With dead ends: 274 [2022-04-06 20:55:26,574 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 20:55:26,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7979 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=59538, Invalid=74784, Unknown=0, NotChecked=0, Total=134322 [2022-04-06 20:55:26,580 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:26,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 44 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:55:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 20:55:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-04-06 20:55:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 254 states have (on average 1.015748031496063) internal successors, (258), 255 states have internal predecessors, (258), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2022-04-06 20:55:26,587 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 255 [2022-04-06 20:55:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:26,588 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2022-04-06 20:55:26,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 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 20:55:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2022-04-06 20:55:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-04-06 20:55:26,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:26,588 INFO L499 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:26,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:26,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 20:55:26,803 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash 532755133, now seen corresponding path program 239 times [2022-04-06 20:55:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:26,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1864789095] [2022-04-06 20:55:26,804 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:26,804 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash 532755133, now seen corresponding path program 240 times [2022-04-06 20:55:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899028565] [2022-04-06 20:55:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:30,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14885 backedges. 122 proven. 14762 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:30,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899028565] [2022-04-06 20:55:30,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899028565] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327108112] [2022-04-06 20:55:30,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:55:30,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:30,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:30,319 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:30,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 20:55:30,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:55:30,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:55:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14885 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 14762 trivial. 0 not checked. [2022-04-06 20:55:30,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14885 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 14762 trivial. 0 not checked. [2022-04-06 20:55:31,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327108112] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:31,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:31,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 5, 5] total 131 [2022-04-06 20:55:31,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:31,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1864789095] [2022-04-06 20:55:31,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1864789095] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:31,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:31,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-04-06 20:55:31,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632734890] [2022-04-06 20:55:31,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:31,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-04-06 20:55:31,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-04-06 20:55:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7655, Invalid=9375, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:55:31,245 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 2 states have call successors, (3), 3 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 20:55:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:35,260 INFO L93 Difference]: Finished difference Result 276 states and 283 transitions. [2022-04-06 20:55:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-04-06 20:55:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 2 states have call successors, (3), 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 257 [2022-04-06 20:55:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:35,261 INFO L225 Difference]: With dead ends: 276 [2022-04-06 20:55:35,261 INFO L226 Difference]: Without dead ends: 263 [2022-04-06 20:55:35,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8602 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=22905, Invalid=40851, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 20:55:35,265 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:35,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 44 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:55:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-06 20:55:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-04-06 20:55:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 256 states have (on average 1.015625) internal successors, (260), 257 states have internal predecessors, (260), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2022-04-06 20:55:35,273 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 257 [2022-04-06 20:55:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:35,273 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2022-04-06 20:55:35,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 2 states have call successors, (3), 3 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 20:55:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2022-04-06 20:55:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-04-06 20:55:35,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:35,274 INFO L499 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:35,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:35,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-06 20:55:35,474 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash -359239846, now seen corresponding path program 241 times [2022-04-06 20:55:35,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:35,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500576113] [2022-04-06 20:55:35,476 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:35,476 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash -359239846, now seen corresponding path program 242 times [2022-04-06 20:55:35,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:35,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663244674] [2022-04-06 20:55:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:38,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15130 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:38,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:38,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663244674] [2022-04-06 20:55:38,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663244674] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:38,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35813154] [2022-04-06 20:55:38,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:55:38,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:38,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:38,623 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:38,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 20:55:38,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:55:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 124 conjunts are in the unsatisfiable core [2022-04-06 20:55:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15130 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:39,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15130 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:48,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35813154] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:48,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:48,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 125, 125] total 250 [2022-04-06 20:55:48,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:48,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500576113] [2022-04-06 20:55:48,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500576113] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:48,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:48,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-04-06 20:55:48,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299114618] [2022-04-06 20:55:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:48,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-04-06 20:55:48,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-04-06 20:55:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30878, Invalid=31372, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 20:55:48,627 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 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 20:55:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:52,384 INFO L93 Difference]: Finished difference Result 278 states and 285 transitions. [2022-04-06 20:55:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-04-06 20:55:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 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 259 [2022-04-06 20:55:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:52,385 INFO L225 Difference]: With dead ends: 278 [2022-04-06 20:55:52,385 INFO L226 Difference]: Without dead ends: 265 [2022-04-06 20:55:52,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8234 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=61506, Invalid=77250, Unknown=0, NotChecked=0, Total=138756 [2022-04-06 20:55:52,389 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:52,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 54 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:55:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-04-06 20:55:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-04-06 20:55:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 258 states have (on average 1.0155038759689923) internal successors, (262), 259 states have internal predecessors, (262), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-04-06 20:55:52,397 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 259 [2022-04-06 20:55:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:52,397 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-04-06 20:55:52,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 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 20:55:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-04-06 20:55:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-04-06 20:55:52,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:52,398 INFO L499 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:52,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:52,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:52,616 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1427044535, now seen corresponding path program 243 times [2022-04-06 20:55:52,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:52,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1998358457] [2022-04-06 20:55:52,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:52,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1427044535, now seen corresponding path program 244 times [2022-04-06 20:55:52,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:52,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877630959] [2022-04-06 20:55:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:52,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:55,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15377 backedges. 124 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877630959] [2022-04-06 20:55:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877630959] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896741146] [2022-04-06 20:55:55,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:55,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:55,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:55,247 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:55,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 20:55:55,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:55,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:55,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 125 conjunts are in the unsatisfiable core [2022-04-06 20:55:55,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15377 backedges. 124 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:55:55,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15377 backedges. 124 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:03,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896741146] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:03,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:03,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 126, 126] total 252 [2022-04-06 20:56:03,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:03,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1998358457] [2022-04-06 20:56:03,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1998358457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:03,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:03,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-04-06 20:56:03,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986049253] [2022-04-06 20:56:03,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:03,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-04-06 20:56:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:03,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-04-06 20:56:03,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31377, Invalid=31875, Unknown=0, NotChecked=0, Total=63252 [2022-04-06 20:56:03,833 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 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 20:56:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:07,212 INFO L93 Difference]: Finished difference Result 280 states and 287 transitions. [2022-04-06 20:56:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-04-06 20:56:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 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 261 [2022-04-06 20:56:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:07,213 INFO L225 Difference]: With dead ends: 280 [2022-04-06 20:56:07,213 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 20:56:07,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8363 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=62502, Invalid=78498, Unknown=0, NotChecked=0, Total=141000 [2022-04-06 20:56:07,218 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:07,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 49 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:56:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 20:56:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-04-06 20:56:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 260 states have (on average 1.0153846153846153) internal successors, (264), 261 states have internal predecessors, (264), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2022-04-06 20:56:07,226 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 261 [2022-04-06 20:56:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:07,226 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2022-04-06 20:56:07,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 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 20:56:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2022-04-06 20:56:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-04-06 20:56:07,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:07,227 INFO L499 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:07,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-04-06 20:56:07,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:07,443 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash 59416276, now seen corresponding path program 245 times [2022-04-06 20:56:07,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:07,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [143398717] [2022-04-06 20:56:07,444 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:07,444 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 59416276, now seen corresponding path program 246 times [2022-04-06 20:56:07,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:07,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967272839] [2022-04-06 20:56:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:07,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:10,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15626 backedges. 125 proven. 15500 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:10,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967272839] [2022-04-06 20:56:10,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967272839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804596424] [2022-04-06 20:56:10,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:10,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:10,527 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:10,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 20:56:10,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:56:10,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:10,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:56:10,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15626 backedges. 125 proven. 1 refuted. 0 times theorem prover too weak. 15500 trivial. 0 not checked. [2022-04-06 20:56:10,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15626 backedges. 125 proven. 1 refuted. 0 times theorem prover too weak. 15500 trivial. 0 not checked. [2022-04-06 20:56:11,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804596424] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:11,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:11,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 5, 5] total 134 [2022-04-06 20:56:11,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:11,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [143398717] [2022-04-06 20:56:11,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [143398717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:11,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:11,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-04-06 20:56:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656478325] [2022-04-06 20:56:11,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:11,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-04-06 20:56:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-04-06 20:56:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8030, Invalid=9792, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:56:11,116 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 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 20:56:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:14,539 INFO L93 Difference]: Finished difference Result 282 states and 289 transitions. [2022-04-06 20:56:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-04-06 20:56:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 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 263 [2022-04-06 20:56:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:14,540 INFO L225 Difference]: With dead ends: 282 [2022-04-06 20:56:14,540 INFO L226 Difference]: Without dead ends: 269 [2022-04-06 20:56:14,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9001 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=24030, Invalid=42792, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 20:56:14,543 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 137 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:14,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 39 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:56:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-04-06 20:56:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-04-06 20:56:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 262 states have (on average 1.015267175572519) internal successors, (266), 263 states have internal predecessors, (266), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2022-04-06 20:56:14,551 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 263 [2022-04-06 20:56:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:14,551 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2022-04-06 20:56:14,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 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 20:56:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2022-04-06 20:56:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-04-06 20:56:14,552 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:14,552 INFO L499 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:14,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:14,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-04-06 20:56:14,768 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash 28651953, now seen corresponding path program 247 times [2022-04-06 20:56:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1228463947] [2022-04-06 20:56:14,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:14,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash 28651953, now seen corresponding path program 248 times [2022-04-06 20:56:14,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78168447] [2022-04-06 20:56:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:14,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:17,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15877 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:17,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78168447] [2022-04-06 20:56:17,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78168447] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434143089] [2022-04-06 20:56:17,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:17,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:17,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:17,522 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:17,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 20:56:17,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:17,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 20:56:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15877 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:17,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15877 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:26,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434143089] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:26,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:26,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 256 [2022-04-06 20:56:26,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:26,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1228463947] [2022-04-06 20:56:26,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1228463947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:26,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:26,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-04-06 20:56:26,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396755706] [2022-04-06 20:56:26,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:26,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-04-06 20:56:26,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-04-06 20:56:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32387, Invalid=32893, Unknown=0, NotChecked=0, Total=65280 [2022-04-06 20:56:26,061 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 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 20:56:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:29,562 INFO L93 Difference]: Finished difference Result 284 states and 291 transitions. [2022-04-06 20:56:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-04-06 20:56:29,562 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 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 265 [2022-04-06 20:56:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:29,563 INFO L225 Difference]: With dead ends: 284 [2022-04-06 20:56:29,563 INFO L226 Difference]: Without dead ends: 271 [2022-04-06 20:56:29,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=64518, Invalid=81024, Unknown=0, NotChecked=0, Total=145542 [2022-04-06 20:56:29,567 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:29,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 54 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:56:29,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-04-06 20:56:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-04-06 20:56:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 265 states have internal predecessors, (268), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2022-04-06 20:56:29,575 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 265 [2022-04-06 20:56:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:29,575 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2022-04-06 20:56:29,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 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 20:56:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2022-04-06 20:56:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-04-06 20:56:29,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:29,576 INFO L499 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:29,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:29,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 20:56:29,792 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash 528908622, now seen corresponding path program 249 times [2022-04-06 20:56:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:29,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1940641559] [2022-04-06 20:56:29,794 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:29,794 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash 528908622, now seen corresponding path program 250 times [2022-04-06 20:56:29,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:29,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139034003] [2022-04-06 20:56:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:29,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16130 backedges. 127 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:32,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139034003] [2022-04-06 20:56:32,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139034003] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:32,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033391109] [2022-04-06 20:56:32,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:56:32,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:32,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:32,562 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 20:56:32,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:56:32,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:32,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-06 20:56:32,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16130 backedges. 127 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:32,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16130 backedges. 127 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:41,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033391109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:41,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:41,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 129, 129] total 258 [2022-04-06 20:56:41,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:41,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1940641559] [2022-04-06 20:56:41,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1940641559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:41,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:41,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-04-06 20:56:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257689842] [2022-04-06 20:56:41,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:41,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-04-06 20:56:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-04-06 20:56:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32898, Invalid=33408, Unknown=0, NotChecked=0, Total=66306 [2022-04-06 20:56:41,222 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 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 20:56:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:44,904 INFO L93 Difference]: Finished difference Result 286 states and 293 transitions. [2022-04-06 20:56:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-04-06 20:56:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 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 267 [2022-04-06 20:56:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:44,905 INFO L225 Difference]: With dead ends: 286 [2022-04-06 20:56:44,905 INFO L226 Difference]: Without dead ends: 273 [2022-04-06 20:56:44,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8756 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=65538, Invalid=82302, Unknown=0, NotChecked=0, Total=147840 [2022-04-06 20:56:44,911 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:44,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 54 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:56:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-04-06 20:56:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-04-06 20:56:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 267 states have internal predecessors, (270), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 276 transitions. [2022-04-06 20:56:44,919 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 276 transitions. Word has length 267 [2022-04-06 20:56:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:44,919 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 276 transitions. [2022-04-06 20:56:44,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 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 20:56:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 276 transitions. [2022-04-06 20:56:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-04-06 20:56:44,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:44,920 INFO L499 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:44,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:45,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-06 20:56:45,136 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash 239230379, now seen corresponding path program 251 times [2022-04-06 20:56:45,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:45,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806305461] [2022-04-06 20:56:45,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:45,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash 239230379, now seen corresponding path program 252 times [2022-04-06 20:56:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992826508] [2022-04-06 20:56:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:47,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16385 backedges. 128 proven. 16256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:47,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:47,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992826508] [2022-04-06 20:56:47,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992826508] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:47,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637906858] [2022-04-06 20:56:47,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:47,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:47,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:47,934 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:47,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 20:56:47,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:56:47,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:56:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16385 backedges. 128 proven. 1 refuted. 0 times theorem prover too weak. 16256 trivial. 0 not checked. [2022-04-06 20:56:48,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16385 backedges. 128 proven. 1 refuted. 0 times theorem prover too weak. 16256 trivial. 0 not checked. [2022-04-06 20:56:48,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637906858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:48,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:48,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 5, 5] total 137 [2022-04-06 20:56:48,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806305461] [2022-04-06 20:56:48,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806305461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:48,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:48,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-04-06 20:56:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978628291] [2022-04-06 20:56:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:48,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-04-06 20:56:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:48,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-04-06 20:56:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8414, Invalid=10218, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:56:48,521 INFO L87 Difference]: Start difference. First operand 273 states and 276 transitions. Second operand has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 2 states have call successors, (3), 3 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 20:56:52,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:52,094 INFO L93 Difference]: Finished difference Result 288 states and 295 transitions. [2022-04-06 20:56:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-04-06 20:56:52,094 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 2 states have call successors, (3), 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 269 [2022-04-06 20:56:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:52,095 INFO L225 Difference]: With dead ends: 288 [2022-04-06 20:56:52,095 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 20:56:52,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9409 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=25182, Invalid=44778, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 20:56:52,097 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:52,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 44 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:56:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 20:56:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-04-06 20:56:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 268 states have (on average 1.0149253731343284) internal successors, (272), 269 states have internal predecessors, (272), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2022-04-06 20:56:52,105 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 269 [2022-04-06 20:56:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:52,105 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2022-04-06 20:56:52,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 2 states have call successors, (3), 3 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 20:56:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2022-04-06 20:56:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-04-06 20:56:52,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:52,106 INFO L499 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:52,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:52,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:52,322 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1031313096, now seen corresponding path program 253 times [2022-04-06 20:56:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:52,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005165260] [2022-04-06 20:56:52,323 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:52,323 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1031313096, now seen corresponding path program 254 times [2022-04-06 20:56:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:52,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381488600] [2022-04-06 20:56:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:52,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16642 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:55,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:55,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381488600] [2022-04-06 20:56:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381488600] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:55,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656217650] [2022-04-06 20:56:55,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:55,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:55,137 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:55,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 20:56:55,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:55,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 130 conjunts are in the unsatisfiable core [2022-04-06 20:56:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16642 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:56:55,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16642 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:03,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656217650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:03,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:03,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-04-06 20:57:03,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005165260] [2022-04-06 20:57:03,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005165260] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:03,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:03,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-04-06 20:57:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096262726] [2022-04-06 20:57:03,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:03,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-04-06 20:57:03,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-04-06 20:57:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33932, Invalid=34450, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 20:57:03,965 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 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 20:57:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:07,648 INFO L93 Difference]: Finished difference Result 290 states and 297 transitions. [2022-04-06 20:57:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-04-06 20:57:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 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 20:57:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:07,649 INFO L225 Difference]: With dead ends: 290 [2022-04-06 20:57:07,649 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 20:57:07,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=67602, Invalid=84888, Unknown=0, NotChecked=0, Total=152490 [2022-04-06 20:57:07,656 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:07,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 44 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:57:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 20:57:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-04-06 20:57:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 271 states have internal predecessors, (274), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2022-04-06 20:57:07,664 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 271 [2022-04-06 20:57:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:07,664 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2022-04-06 20:57:07,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 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 20:57:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2022-04-06 20:57:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-04-06 20:57:07,665 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:07,666 INFO L499 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:07,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:07,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:07,882 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2013592741, now seen corresponding path program 255 times [2022-04-06 20:57:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:07,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776922476] [2022-04-06 20:57:07,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:07,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2013592741, now seen corresponding path program 256 times [2022-04-06 20:57:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545794938] [2022-04-06 20:57:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:10,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16901 backedges. 130 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:10,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545794938] [2022-04-06 20:57:10,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545794938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650856576] [2022-04-06 20:57:10,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:57:10,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:10,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:10,809 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:10,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 20:57:10,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:57:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 20:57:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16901 backedges. 130 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:11,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16901 backedges. 130 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:22,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650856576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:22,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:22,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 132, 132] total 264 [2022-04-06 20:57:22,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:22,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776922476] [2022-04-06 20:57:22,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776922476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:22,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:22,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-04-06 20:57:22,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270796111] [2022-04-06 20:57:22,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:22,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-04-06 20:57:22,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:22,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-04-06 20:57:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34455, Invalid=34977, Unknown=0, NotChecked=0, Total=69432 [2022-04-06 20:57:22,311 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 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 20:57:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:26,023 INFO L93 Difference]: Finished difference Result 292 states and 299 transitions. [2022-04-06 20:57:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-04-06 20:57:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 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 273 [2022-04-06 20:57:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:26,024 INFO L225 Difference]: With dead ends: 292 [2022-04-06 20:57:26,024 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 20:57:26,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9158 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=68646, Invalid=86196, Unknown=0, NotChecked=0, Total=154842 [2022-04-06 20:57:26,031 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 142 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:26,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 34 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:57:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 20:57:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-04-06 20:57:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 272 states have (on average 1.0147058823529411) internal successors, (276), 273 states have internal predecessors, (276), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 282 transitions. [2022-04-06 20:57:26,040 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 282 transitions. Word has length 273 [2022-04-06 20:57:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:26,040 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 282 transitions. [2022-04-06 20:57:26,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 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 20:57:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 282 transitions. [2022-04-06 20:57:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-04-06 20:57:26,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:26,041 INFO L499 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:26,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:26,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-04-06 20:57:26,257 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1091526466, now seen corresponding path program 257 times [2022-04-06 20:57:26,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:26,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631778460] [2022-04-06 20:57:26,258 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:26,258 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1091526466, now seen corresponding path program 258 times [2022-04-06 20:57:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:26,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147370256] [2022-04-06 20:57:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:29,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17162 backedges. 131 proven. 17030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:29,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:29,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147370256] [2022-04-06 20:57:29,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147370256] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642320071] [2022-04-06 20:57:29,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:57:29,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:29,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:29,158 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:29,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 20:57:29,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:57:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:57:29,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17162 backedges. 131 proven. 1 refuted. 0 times theorem prover too weak. 17030 trivial. 0 not checked. [2022-04-06 20:57:29,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17162 backedges. 131 proven. 1 refuted. 0 times theorem prover too weak. 17030 trivial. 0 not checked. [2022-04-06 20:57:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642320071] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:29,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 5, 5] total 140 [2022-04-06 20:57:29,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631778460] [2022-04-06 20:57:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631778460] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:29,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:29,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-04-06 20:57:29,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442973699] [2022-04-06 20:57:29,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:29,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-04-06 20:57:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:29,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-04-06 20:57:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8807, Invalid=10653, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:57:29,752 INFO L87 Difference]: Start difference. First operand 279 states and 282 transitions. Second operand has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 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 20:57:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:33,848 INFO L93 Difference]: Finished difference Result 294 states and 301 transitions. [2022-04-06 20:57:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-04-06 20:57:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 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 275 [2022-04-06 20:57:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:33,850 INFO L225 Difference]: With dead ends: 294 [2022-04-06 20:57:33,850 INFO L226 Difference]: Without dead ends: 281 [2022-04-06 20:57:33,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9826 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=26361, Invalid=46809, Unknown=0, NotChecked=0, Total=73170 [2022-04-06 20:57:33,854 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 143 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:33,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 49 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:57:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-04-06 20:57:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-04-06 20:57:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 275 states have internal predecessors, (278), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 284 transitions. [2022-04-06 20:57:33,862 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 284 transitions. Word has length 275 [2022-04-06 20:57:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:33,862 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 284 transitions. [2022-04-06 20:57:33,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 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 20:57:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 284 transitions. [2022-04-06 20:57:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-06 20:57:33,863 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:33,863 INFO L499 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:33,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:34,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-06 20:57:34,065 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash -250900833, now seen corresponding path program 259 times [2022-04-06 20:57:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:34,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034905639] [2022-04-06 20:57:34,066 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:34,066 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash -250900833, now seen corresponding path program 260 times [2022-04-06 20:57:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:34,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360493977] [2022-04-06 20:57:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:37,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17425 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360493977] [2022-04-06 20:57:37,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360493977] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927176335] [2022-04-06 20:57:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:57:37,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:37,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:37,898 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:37,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 20:57:37,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:57:37,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 20:57:37,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17425 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:38,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17425 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:48,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927176335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:48,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:48,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 134, 134] total 268 [2022-04-06 20:57:48,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034905639] [2022-04-06 20:57:48,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034905639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:48,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:48,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-04-06 20:57:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831215633] [2022-04-06 20:57:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:48,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-04-06 20:57:48,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-04-06 20:57:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35513, Invalid=36043, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 20:57:48,199 INFO L87 Difference]: Start difference. First operand 281 states and 284 transitions. Second operand has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 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 20:57:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:52,481 INFO L93 Difference]: Finished difference Result 296 states and 303 transitions. [2022-04-06 20:57:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-04-06 20:57:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 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 277 [2022-04-06 20:57:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:52,482 INFO L225 Difference]: With dead ends: 296 [2022-04-06 20:57:52,482 INFO L226 Difference]: Without dead ends: 283 [2022-04-06 20:57:52,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9431 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=70758, Invalid=88842, Unknown=0, NotChecked=0, Total=159600 [2022-04-06 20:57:52,489 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:52,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 39 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:57:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-06 20:57:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-04-06 20:57:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 277 states have internal predecessors, (280), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 286 transitions. [2022-04-06 20:57:52,498 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 286 transitions. Word has length 277 [2022-04-06 20:57:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:52,498 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 286 transitions. [2022-04-06 20:57:52,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 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 20:57:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 286 transitions. [2022-04-06 20:57:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-04-06 20:57:52,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:52,499 INFO L499 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:52,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:52,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 20:57:52,711 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1833346372, now seen corresponding path program 261 times [2022-04-06 20:57:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368936067] [2022-04-06 20:57:52,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:52,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1833346372, now seen corresponding path program 262 times [2022-04-06 20:57:52,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:52,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165689950] [2022-04-06 20:57:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:52,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:55,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17690 backedges. 133 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165689950] [2022-04-06 20:57:55,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165689950] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851857074] [2022-04-06 20:57:55,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:57:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:55,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:55,919 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:55,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 20:57:56,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:57:56,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 134 conjunts are in the unsatisfiable core [2022-04-06 20:57:56,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17690 backedges. 133 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:57:56,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17690 backedges. 133 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851857074] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:08,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:08,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 135, 135] total 270 [2022-04-06 20:58:08,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368936067] [2022-04-06 20:58:08,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368936067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:08,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:08,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-04-06 20:58:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286550723] [2022-04-06 20:58:08,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:08,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-04-06 20:58:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-04-06 20:58:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36048, Invalid=36582, Unknown=0, NotChecked=0, Total=72630 [2022-04-06 20:58:08,184 INFO L87 Difference]: Start difference. First operand 283 states and 286 transitions. Second operand has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 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 20:58:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:12,990 INFO L93 Difference]: Finished difference Result 298 states and 305 transitions. [2022-04-06 20:58:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-04-06 20:58:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 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 279 [2022-04-06 20:58:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:12,991 INFO L225 Difference]: With dead ends: 298 [2022-04-06 20:58:12,991 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 20:58:12,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9569 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=71826, Invalid=90180, Unknown=0, NotChecked=0, Total=162006 [2022-04-06 20:58:12,998 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 145 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:12,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 59 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:58:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 20:58:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-04-06 20:58:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 278 states have (on average 1.014388489208633) internal successors, (282), 279 states have internal predecessors, (282), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-04-06 20:58:13,006 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 279 [2022-04-06 20:58:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:13,006 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-04-06 20:58:13,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 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 20:58:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-04-06 20:58:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-04-06 20:58:13,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:13,007 INFO L499 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:13,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:13,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 20:58:13,215 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2145086567, now seen corresponding path program 263 times [2022-04-06 20:58:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:13,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1639019851] [2022-04-06 20:58:13,249 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:13,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2145086567, now seen corresponding path program 264 times [2022-04-06 20:58:13,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:13,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144386035] [2022-04-06 20:58:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:13,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:17,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17957 backedges. 134 proven. 17822 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:17,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144386035] [2022-04-06 20:58:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144386035] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418127459] [2022-04-06 20:58:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:58:17,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:17,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:17,282 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:17,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 20:58:17,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:58:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:58:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17957 backedges. 134 proven. 1 refuted. 0 times theorem prover too weak. 17822 trivial. 0 not checked. [2022-04-06 20:58:17,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17957 backedges. 134 proven. 1 refuted. 0 times theorem prover too weak. 17822 trivial. 0 not checked. [2022-04-06 20:58:17,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418127459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:17,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:17,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 5, 5] total 143 [2022-04-06 20:58:17,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:17,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1639019851] [2022-04-06 20:58:17,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1639019851] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:17,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:17,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-04-06 20:58:17,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124747815] [2022-04-06 20:58:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:17,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-04-06 20:58:17,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-04-06 20:58:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9209, Invalid=11097, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 20:58:17,883 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 2 states have call successors, (3), 3 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 20:58:21,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:21,809 INFO L93 Difference]: Finished difference Result 300 states and 307 transitions. [2022-04-06 20:58:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-04-06 20:58:21,809 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 2 states have call successors, (3), 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 281 [2022-04-06 20:58:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:21,810 INFO L225 Difference]: With dead ends: 300 [2022-04-06 20:58:21,810 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 20:58:21,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10252 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27567, Invalid=48885, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 20:58:21,812 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:21,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 39 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:58:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 20:58:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-04-06 20:58:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 281 states have internal predecessors, (284), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 290 transitions. [2022-04-06 20:58:21,823 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 290 transitions. Word has length 281 [2022-04-06 20:58:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:21,825 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 290 transitions. [2022-04-06 20:58:21,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 2 states have call successors, (3), 3 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 20:58:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 290 transitions. [2022-04-06 20:58:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-04-06 20:58:21,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:21,826 INFO L499 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:21,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:22,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 20:58:22,041 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1079703242, now seen corresponding path program 265 times [2022-04-06 20:58:22,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:22,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496944590] [2022-04-06 20:58:22,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:22,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:22,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1079703242, now seen corresponding path program 266 times [2022-04-06 20:58:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:22,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478457856] [2022-04-06 20:58:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:26,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18226 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:26,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478457856] [2022-04-06 20:58:26,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478457856] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971750559] [2022-04-06 20:58:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:58:26,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:26,763 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:26,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 20:58:26,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:58:26,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:26,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 136 conjunts are in the unsatisfiable core [2022-04-06 20:58:26,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18226 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:27,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18226 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:38,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971750559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:38,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:38,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 137, 137] total 274 [2022-04-06 20:58:38,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:38,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496944590] [2022-04-06 20:58:38,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496944590] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:38,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:38,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-04-06 20:58:38,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413432976] [2022-04-06 20:58:38,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:38,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-04-06 20:58:38,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-04-06 20:58:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37130, Invalid=37672, Unknown=0, NotChecked=0, Total=74802 [2022-04-06 20:58:38,368 INFO L87 Difference]: Start difference. First operand 287 states and 290 transitions. Second operand has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 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 20:58:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:42,383 INFO L93 Difference]: Finished difference Result 302 states and 309 transitions. [2022-04-06 20:58:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-04-06 20:58:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 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 283 [2022-04-06 20:58:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:42,384 INFO L225 Difference]: With dead ends: 302 [2022-04-06 20:58:42,384 INFO L226 Difference]: Without dead ends: 289 [2022-04-06 20:58:42,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=73986, Invalid=92886, Unknown=0, NotChecked=0, Total=166872 [2022-04-06 20:58:42,391 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 147 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:42,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 44 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:58:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-04-06 20:58:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-04-06 20:58:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 282 states have (on average 1.0141843971631206) internal successors, (286), 283 states have internal predecessors, (286), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 292 transitions. [2022-04-06 20:58:42,399 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 292 transitions. Word has length 283 [2022-04-06 20:58:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:42,399 INFO L478 AbstractCegarLoop]: Abstraction has 289 states and 292 transitions. [2022-04-06 20:58:42,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 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 20:58:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 292 transitions. [2022-04-06 20:58:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-04-06 20:58:42,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:42,401 INFO L499 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:42,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-06 20:58:42,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-04-06 20:58:42,611 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash 551455635, now seen corresponding path program 267 times [2022-04-06 20:58:42,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060383776] [2022-04-06 20:58:42,613 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:42,613 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash 551455635, now seen corresponding path program 268 times [2022-04-06 20:58:42,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:42,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177629210] [2022-04-06 20:58:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:42,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:45,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18497 backedges. 136 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:46,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177629210] [2022-04-06 20:58:46,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177629210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:46,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941543311] [2022-04-06 20:58:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:58:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:46,002 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:46,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 20:58:46,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:58:46,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:46,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-06 20:58:46,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18497 backedges. 136 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:46,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18497 backedges. 136 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:58:55,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941543311] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:55,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:55,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 138, 138] total 276 [2022-04-06 20:58:55,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:55,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060383776] [2022-04-06 20:58:55,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060383776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:55,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:55,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-04-06 20:58:55,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396244524] [2022-04-06 20:58:55,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:55,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-04-06 20:58:55,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-04-06 20:58:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37677, Invalid=38223, Unknown=0, NotChecked=0, Total=75900 [2022-04-06 20:58:55,945 INFO L87 Difference]: Start difference. First operand 289 states and 292 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 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 20:59:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:00,142 INFO L93 Difference]: Finished difference Result 304 states and 311 transitions. [2022-04-06 20:59:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-06 20:59:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 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 285 [2022-04-06 20:59:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:00,143 INFO L225 Difference]: With dead ends: 304 [2022-04-06 20:59:00,143 INFO L226 Difference]: Without dead ends: 291 [2022-04-06 20:59:00,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9989 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=75078, Invalid=94254, Unknown=0, NotChecked=0, Total=169332 [2022-04-06 20:59:00,149 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 148 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:00,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 59 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-06 20:59:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-04-06 20:59:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 285 states have internal predecessors, (288), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 294 transitions. [2022-04-06 20:59:00,157 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 294 transitions. Word has length 285 [2022-04-06 20:59:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:00,158 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 294 transitions. [2022-04-06 20:59:00,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 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 20:59:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 294 transitions. [2022-04-06 20:59:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-04-06 20:59:00,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:00,159 INFO L499 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:00,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:00,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:00,365 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:00,366 INFO L85 PathProgramCache]: Analyzing trace with hash 432073392, now seen corresponding path program 269 times [2022-04-06 20:59:00,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:00,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2125608044] [2022-04-06 20:59:00,367 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:00,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash 432073392, now seen corresponding path program 270 times [2022-04-06 20:59:00,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:00,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723472679] [2022-04-06 20:59:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:00,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:03,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18770 backedges. 137 proven. 18632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:59:03,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:03,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723472679] [2022-04-06 20:59:03,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723472679] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:03,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185120735] [2022-04-06 20:59:03,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:03,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:03,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:03,878 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:03,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 20:59:03,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:59:03,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:59:03,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18770 backedges. 137 proven. 1 refuted. 0 times theorem prover too weak. 18632 trivial. 0 not checked. [2022-04-06 20:59:04,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18770 backedges. 137 proven. 1 refuted. 0 times theorem prover too weak. 18632 trivial. 0 not checked. [2022-04-06 20:59:04,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185120735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:04,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:04,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 5, 5] total 146 [2022-04-06 20:59:04,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:04,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2125608044] [2022-04-06 20:59:04,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2125608044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:04,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:04,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-04-06 20:59:04,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280531948] [2022-04-06 20:59:04,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:04,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-06 20:59:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-06 20:59:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9620, Invalid=11550, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:59:04,520 INFO L87 Difference]: Start difference. First operand 291 states and 294 transitions. Second operand has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 states have internal predecessors, (283), 2 states have call successors, (3), 3 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 20:59:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:08,619 INFO L93 Difference]: Finished difference Result 306 states and 313 transitions. [2022-04-06 20:59:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-04-06 20:59:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-04-06 20:59:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:08,620 INFO L225 Difference]: With dead ends: 306 [2022-04-06 20:59:08,620 INFO L226 Difference]: Without dead ends: 293 [2022-04-06 20:59:08,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10687 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=28800, Invalid=51006, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 20:59:08,623 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:08,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 39 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-06 20:59:08,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-04-06 20:59:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 286 states have (on average 1.013986013986014) internal successors, (290), 287 states have internal predecessors, (290), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 296 transitions. [2022-04-06 20:59:08,631 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 296 transitions. Word has length 287 [2022-04-06 20:59:08,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:08,631 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 296 transitions. [2022-04-06 20:59:08,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 states have internal predecessors, (283), 2 states have call successors, (3), 3 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 20:59:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 296 transitions. [2022-04-06 20:59:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-04-06 20:59:08,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:08,633 INFO L499 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:08,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:08,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-04-06 20:59:08,848 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1669854861, now seen corresponding path program 271 times [2022-04-06 20:59:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:08,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589290384] [2022-04-06 20:59:08,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:08,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:08,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1669854861, now seen corresponding path program 272 times [2022-04-06 20:59:08,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:08,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553718707] [2022-04-06 20:59:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:08,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:13,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19045 backedges. 138 proven. 18906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:59:13,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553718707] [2022-04-06 20:59:13,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553718707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103143404] [2022-04-06 20:59:13,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:13,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:13,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:13,338 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:13,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 20:59:13,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:13,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 139 conjunts are in the unsatisfiable core [2022-04-06 20:59:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19045 backedges. 138 proven. 18906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:59:13,893 INFO L328 TraceCheckSpWp]: Computing backward predicates...