/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 02:24:02,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:24:02,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:24:02,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 02:24:02,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 02:24:02,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 02:24:02,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 02:24:02,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 02:24:02,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 02:24:02,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 02:24:02,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 02:24:02,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 02:24:02,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 02:24:02,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 02:24:02,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 02:24:02,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 02:24:02,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 02:24:02,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 02:24:02,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 02:24:02,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 02:24:02,342 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 02:24:02,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 02:24:02,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 02:24:02,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 02:24:02,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 02:24:02,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 02:24:02,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 02:24:02,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 02:24:02,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 02:24:02,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 02:24:02,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 02:24:02,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 02:24:02,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 02:24:02,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 02:24:02,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 02:24:02,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 02:24:02,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 02:24:02,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 02:24:02,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 02:24:02,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 02:24:02,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 02:24:02,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 02:24:02,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 02:24:02,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:24:02,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:24:02,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:24:02,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:24:02,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:24:02,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:24:02,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:24:02,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:24:02,360 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:24:02,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:24:02,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:24:02,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:24:02,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:24:02,589 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:24:02,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-03-19 02:24:02,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1834ada7b/fcba4d7b72f14d2c91572d33d5da7f55/FLAGa1ed4ded9 [2022-03-19 02:24:03,004 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:24:03,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-03-19 02:24:03,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1834ada7b/fcba4d7b72f14d2c91572d33d5da7f55/FLAGa1ed4ded9 [2022-03-19 02:24:03,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1834ada7b/fcba4d7b72f14d2c91572d33d5da7f55 [2022-03-19 02:24:03,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:24:03,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:24:03,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:24:03,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:24:03,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:24:03,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac6e2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03, skipping insertion in model container [2022-03-19 02:24:03,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:24:03,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:24:03,583 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i[809,822] [2022-03-19 02:24:03,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:24:03,621 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:24:03,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i[809,822] [2022-03-19 02:24:03,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:24:03,644 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:24:03,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03 WrapperNode [2022-03-19 02:24:03,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:24:03,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:24:03,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:24:03,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:24:03,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:24:03,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:24:03,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:24:03,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:24:03,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (1/1) ... [2022-03-19 02:24:03,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:24:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:03,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 02:24:03,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 02:24:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:24:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:24:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:24:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:24:03,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:24:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:24:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:24:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 02:24:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 02:24:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:24:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:24:03,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:24:03,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:24:03,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 02:24:03,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-19 02:24:03,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:24:03,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:24:03,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:24:03,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:24:03,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:24:03,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:24:03,812 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:24:03,814 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:24:03,932 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:24:03,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:24:03,936 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 02:24:03,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:24:03 BoogieIcfgContainer [2022-03-19 02:24:03,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:24:03,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:24:03,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:24:03,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:24:03,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:24:03" (1/3) ... [2022-03-19 02:24:03,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3fce35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:24:03, skipping insertion in model container [2022-03-19 02:24:03,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:24:03" (2/3) ... [2022-03-19 02:24:03,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3fce35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:24:03, skipping insertion in model container [2022-03-19 02:24:03,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:24:03" (3/3) ... [2022-03-19 02:24:03,955 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2022-03-19 02:24:03,958 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:24:03,959 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:24:04,030 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:24:04,035 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 02:24:04,035 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:24:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:24:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 02:24:04,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:04,066 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:04,066 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:04,070 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2022-03-19 02:24:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474988566] [2022-03-19 02:24:04,087 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:24:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 2 times [2022-03-19 02:24:04,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:04,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631479726] [2022-03-19 02:24:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:04,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:04,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631479726] [2022-03-19 02:24:04,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631479726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:04,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:04,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:24:04,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:04,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474988566] [2022-03-19 02:24:04,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474988566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:04,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:04,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:24:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145130851] [2022-03-19 02:24:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:04,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 02:24:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:04,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 02:24:04,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:24:04,276 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:04,325 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-19 02:24:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 02:24:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 02:24:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:04,331 INFO L225 Difference]: With dead ends: 34 [2022-03-19 02:24:04,331 INFO L226 Difference]: Without dead ends: 14 [2022-03-19 02:24:04,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:24:04,335 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:04,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-19 02:24:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-19 02:24:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-19 02:24:04,356 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-03-19 02:24:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:04,356 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-19 02:24:04,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-19 02:24:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 02:24:04,357 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:04,357 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:04,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:24:04,357 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2022-03-19 02:24:04,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:04,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12619733] [2022-03-19 02:24:04,359 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:24:04,359 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 2 times [2022-03-19 02:24:04,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:04,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438347220] [2022-03-19 02:24:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:04,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:04,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438347220] [2022-03-19 02:24:04,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438347220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:04,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:04,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:24:04,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12619733] [2022-03-19 02:24:04,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12619733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:04,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:04,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:24:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562340792] [2022-03-19 02:24:04,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:04,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:24:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:24:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 02:24:04,404 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:04,425 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-19 02:24:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:24:04,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 02:24:04,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:04,426 INFO L225 Difference]: With dead ends: 22 [2022-03-19 02:24:04,426 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 02:24:04,427 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 02:24:04,428 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:04,428 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 02:24:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-19 02:24:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-19 02:24:04,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-19 02:24:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:04,432 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-19 02:24:04,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-19 02:24:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 02:24:04,433 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:04,433 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:04,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 02:24:04,433 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2022-03-19 02:24:04,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:04,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1552340482] [2022-03-19 02:24:04,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:04,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:04,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 2 times [2022-03-19 02:24:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:04,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005611064] [2022-03-19 02:24:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:04,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:04,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:04,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:04,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005611064] [2022-03-19 02:24:04,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005611064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:04,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541044884] [2022-03-19 02:24:04,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:04,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:04,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:04,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:04,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 02:24:04,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:04,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 02:24:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:04,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:04,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541044884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:04,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:04,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 02:24:04,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1552340482] [2022-03-19 02:24:04,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1552340482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:04,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:04,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:24:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269480780] [2022-03-19 02:24:04,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:04,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:24:04,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:04,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:24:04,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:24:04,699 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:04,744 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-19 02:24:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:24:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 02:24:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:04,745 INFO L225 Difference]: With dead ends: 24 [2022-03-19 02:24:04,745 INFO L226 Difference]: Without dead ends: 18 [2022-03-19 02:24:04,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 02:24:04,750 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:04,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-19 02:24:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-03-19 02:24:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-19 02:24:04,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-03-19 02:24:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:04,758 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-19 02:24:04,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-19 02:24:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 02:24:04,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:04,758 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:04,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 02:24:04,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:05,000 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 3 times [2022-03-19 02:24:05,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:05,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37921048] [2022-03-19 02:24:05,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:05,004 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:05,005 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 4 times [2022-03-19 02:24:05,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:05,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234385877] [2022-03-19 02:24:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:05,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:05,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234385877] [2022-03-19 02:24:05,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234385877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:05,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818184044] [2022-03-19 02:24:05,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:05,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:05,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:05,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 02:24:05,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:05,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:24:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:05,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:05,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818184044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:05,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:05,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 02:24:05,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:05,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37921048] [2022-03-19 02:24:05,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37921048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:05,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:05,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:24:05,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056763900] [2022-03-19 02:24:05,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:05,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:24:05,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:24:05,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 02:24:05,246 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:05,301 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-19 02:24:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:24:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-19 02:24:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:05,302 INFO L225 Difference]: With dead ends: 26 [2022-03-19 02:24:05,302 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 02:24:05,303 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:24:05,303 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:05,304 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 02:24:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-19 02:24:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-19 02:24:05,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-03-19 02:24:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:05,307 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-19 02:24:05,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-19 02:24:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 02:24:05,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:05,308 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:05,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:05,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 02:24:05,508 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:05,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 5 times [2022-03-19 02:24:05,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:05,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [258404081] [2022-03-19 02:24:05,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:05,511 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:05,511 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 6 times [2022-03-19 02:24:05,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:05,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99138523] [2022-03-19 02:24:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:05,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:05,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:05,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99138523] [2022-03-19 02:24:05,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99138523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806222480] [2022-03-19 02:24:05,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:05,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:05,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:05,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 02:24:05,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 02:24:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 02:24:05,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:05,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:05,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806222480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:05,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:05,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-19 02:24:05,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:05,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [258404081] [2022-03-19 02:24:05,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [258404081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:05,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:05,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:24:05,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589631766] [2022-03-19 02:24:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:05,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:24:05,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:24:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:24:05,720 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:05,763 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-19 02:24:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:24:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-19 02:24:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:05,764 INFO L225 Difference]: With dead ends: 28 [2022-03-19 02:24:05,764 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 02:24:05,764 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-03-19 02:24:05,765 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:05,765 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 02:24:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-19 02:24:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-19 02:24:05,769 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-03-19 02:24:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:05,769 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-19 02:24:05,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-19 02:24:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 02:24:05,769 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:05,769 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:05,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:05,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:05,986 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 7 times [2022-03-19 02:24:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:05,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241012364] [2022-03-19 02:24:05,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:05,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:05,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 8 times [2022-03-19 02:24:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:05,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434384244] [2022-03-19 02:24:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:06,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:06,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:06,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434384244] [2022-03-19 02:24:06,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434384244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:06,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851507716] [2022-03-19 02:24:06,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:06,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:06,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:06,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:06,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 02:24:06,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 02:24:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:06,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:06,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851507716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:06,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:06,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 02:24:06,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:06,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241012364] [2022-03-19 02:24:06,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241012364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:06,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:06,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:24:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843346961] [2022-03-19 02:24:06,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:06,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:24:06,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:24:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:24:06,181 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:06,232 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-19 02:24:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:24:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 02:24:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:06,233 INFO L225 Difference]: With dead ends: 30 [2022-03-19 02:24:06,233 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 02:24:06,233 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-19 02:24:06,234 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:06,234 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 02:24:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-19 02:24:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-03-19 02:24:06,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-03-19 02:24:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:06,237 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-03-19 02:24:06,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-03-19 02:24:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 02:24:06,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:06,238 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:06,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:06,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:06,455 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 9 times [2022-03-19 02:24:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:06,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583253823] [2022-03-19 02:24:06,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:06,457 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:06,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:06,457 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 10 times [2022-03-19 02:24:06,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:06,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495064354] [2022-03-19 02:24:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:06,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:06,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:06,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:06,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495064354] [2022-03-19 02:24:06,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495064354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:06,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152139370] [2022-03-19 02:24:06,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:06,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:06,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:06,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:06,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 02:24:06,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:06,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:24:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:06,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:06,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152139370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:06,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:06,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-19 02:24:06,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583253823] [2022-03-19 02:24:06,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583253823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:06,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:06,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:24:06,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129119595] [2022-03-19 02:24:06,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:06,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:24:06,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:24:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-19 02:24:06,715 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:06,784 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-19 02:24:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:24:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-19 02:24:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:06,784 INFO L225 Difference]: With dead ends: 32 [2022-03-19 02:24:06,784 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 02:24:06,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:24:06,785 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:06,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 02:24:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-19 02:24:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-19 02:24:06,788 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-03-19 02:24:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:06,789 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-19 02:24:06,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-19 02:24:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 02:24:06,789 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:06,789 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:06,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:07,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:07,024 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 11 times [2022-03-19 02:24:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072024228] [2022-03-19 02:24:07,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:07,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:07,026 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 12 times [2022-03-19 02:24:07,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:07,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745522320] [2022-03-19 02:24:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:07,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:07,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:07,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:07,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745522320] [2022-03-19 02:24:07,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745522320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:07,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113192567] [2022-03-19 02:24:07,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:07,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:07,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:07,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:07,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 02:24:07,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 02:24:07,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:24:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:07,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:07,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113192567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:07,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:07,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 02:24:07,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072024228] [2022-03-19 02:24:07,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072024228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:07,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:07,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:24:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281161774] [2022-03-19 02:24:07,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:07,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:24:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:24:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:24:07,328 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:07,398 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-19 02:24:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:24:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 02:24:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:07,400 INFO L225 Difference]: With dead ends: 34 [2022-03-19 02:24:07,400 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 02:24:07,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-19 02:24:07,401 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:07,401 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 02:24:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-19 02:24:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-03-19 02:24:07,409 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-03-19 02:24:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:07,409 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-03-19 02:24:07,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-03-19 02:24:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 02:24:07,410 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:07,410 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:07,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:07,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:07,634 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:07,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 13 times [2022-03-19 02:24:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:07,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538937181] [2022-03-19 02:24:07,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:07,637 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:07,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 14 times [2022-03-19 02:24:07,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:07,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223890008] [2022-03-19 02:24:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:07,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:07,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:07,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:07,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223890008] [2022-03-19 02:24:07,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223890008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:07,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794847252] [2022-03-19 02:24:07,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:07,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:07,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 02:24:07,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:07,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:07,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:24:07,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:07,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:07,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794847252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:07,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:07,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-19 02:24:07,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538937181] [2022-03-19 02:24:07,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538937181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:07,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:07,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:24:07,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660227569] [2022-03-19 02:24:07,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:07,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:24:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:24:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-19 02:24:07,997 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:08,080 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-19 02:24:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:24:08,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 02:24:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:08,082 INFO L225 Difference]: With dead ends: 36 [2022-03-19 02:24:08,082 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 02:24:08,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:24:08,084 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:08,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 02:24:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-19 02:24:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-19 02:24:08,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-03-19 02:24:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:08,091 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-19 02:24:08,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-19 02:24:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 02:24:08,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:08,092 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:08,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:08,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:08,309 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:08,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 15 times [2022-03-19 02:24:08,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:08,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28546359] [2022-03-19 02:24:08,312 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:08,312 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:08,312 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 16 times [2022-03-19 02:24:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:08,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436967210] [2022-03-19 02:24:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:08,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:08,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:08,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436967210] [2022-03-19 02:24:08,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436967210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753732884] [2022-03-19 02:24:08,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:08,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:08,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:08,392 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:08,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 02:24:08,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:08,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:08,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 02:24:08,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:08,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:08,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753732884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:08,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:08,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-19 02:24:08,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:08,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28546359] [2022-03-19 02:24:08,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28546359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:08,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:08,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:24:08,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462856081] [2022-03-19 02:24:08,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:08,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:24:08,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:24:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:24:08,674 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:08,766 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-19 02:24:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:24:08,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 02:24:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:08,767 INFO L225 Difference]: With dead ends: 38 [2022-03-19 02:24:08,767 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 02:24:08,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:24:08,768 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:08,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 02:24:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-03-19 02:24:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-19 02:24:08,771 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-03-19 02:24:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:08,772 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-19 02:24:08,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-19 02:24:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 02:24:08,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:08,772 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:08,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:08,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 02:24:08,995 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 17 times [2022-03-19 02:24:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396116123] [2022-03-19 02:24:08,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:08,997 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:08,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 18 times [2022-03-19 02:24:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:08,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058972502] [2022-03-19 02:24:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:08,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:09,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058972502] [2022-03-19 02:24:09,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058972502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062197515] [2022-03-19 02:24:09,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:09,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:09,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:09,096 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:09,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 02:24:09,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:24:09,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 02:24:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:09,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:09,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062197515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:09,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:09,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-19 02:24:09,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:09,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396116123] [2022-03-19 02:24:09,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396116123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:09,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:09,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:24:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42124437] [2022-03-19 02:24:09,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:09,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:24:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:24:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:24:09,381 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:09,476 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-19 02:24:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:24:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 02:24:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:09,477 INFO L225 Difference]: With dead ends: 40 [2022-03-19 02:24:09,477 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 02:24:09,477 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:24:09,478 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:09,478 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 02:24:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-19 02:24:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-19 02:24:09,481 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-03-19 02:24:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:09,481 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-19 02:24:09,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-19 02:24:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 02:24:09,482 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:09,482 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:09,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 02:24:09,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:09,693 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 19 times [2022-03-19 02:24:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173782348] [2022-03-19 02:24:09,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:09,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:09,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 20 times [2022-03-19 02:24:09,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:09,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889195534] [2022-03-19 02:24:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:09,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:09,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:09,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889195534] [2022-03-19 02:24:09,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889195534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:09,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085943585] [2022-03-19 02:24:09,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:09,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:09,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:09,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:09,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 02:24:09,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:09,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 02:24:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:09,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:10,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085943585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:10,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:10,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-19 02:24:10,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:10,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173782348] [2022-03-19 02:24:10,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173782348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:10,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:10,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:24:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9128869] [2022-03-19 02:24:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:10,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:24:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:24:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:24:10,095 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:10,221 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-19 02:24:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:24:10,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 02:24:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:10,222 INFO L225 Difference]: With dead ends: 42 [2022-03-19 02:24:10,222 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 02:24:10,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 02:24:10,223 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:10,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 02:24:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-19 02:24:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-03-19 02:24:10,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-03-19 02:24:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:10,228 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-03-19 02:24:10,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-03-19 02:24:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 02:24:10,228 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:10,228 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:10,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:10,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 02:24:10,445 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:10,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 21 times [2022-03-19 02:24:10,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:10,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [864080862] [2022-03-19 02:24:10,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:10,447 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:10,447 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 22 times [2022-03-19 02:24:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:10,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593830793] [2022-03-19 02:24:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:10,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:10,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:10,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:10,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593830793] [2022-03-19 02:24:10,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593830793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:10,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993868211] [2022-03-19 02:24:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:10,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:10,546 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:10,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 02:24:10,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 02:24:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:10,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:10,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993868211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:10,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:10,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-19 02:24:10,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:10,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [864080862] [2022-03-19 02:24:10,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [864080862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:10,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:10,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:24:10,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537869570] [2022-03-19 02:24:10,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:10,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:24:10,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:24:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:24:10,850 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:10,960 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-19 02:24:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:24:10,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-19 02:24:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:10,960 INFO L225 Difference]: With dead ends: 44 [2022-03-19 02:24:10,960 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 02:24:10,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 02:24:10,962 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:10,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 02:24:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-19 02:24:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-03-19 02:24:10,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-03-19 02:24:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:10,966 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-03-19 02:24:10,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-03-19 02:24:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 02:24:10,966 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:10,966 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:10,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:11,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 02:24:11,183 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 23 times [2022-03-19 02:24:11,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:11,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827644902] [2022-03-19 02:24:11,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:11,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:11,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:11,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 24 times [2022-03-19 02:24:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:11,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730313088] [2022-03-19 02:24:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:11,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:11,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730313088] [2022-03-19 02:24:11,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730313088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506193112] [2022-03-19 02:24:11,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:11,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:11,300 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:11,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 02:24:11,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-19 02:24:11,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 02:24:11,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:11,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:11,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506193112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:11,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:11,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-19 02:24:11,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827644902] [2022-03-19 02:24:11,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827644902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:11,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:11,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:24:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988119272] [2022-03-19 02:24:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:11,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:24:11,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:24:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-19 02:24:11,759 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:11,912 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-19 02:24:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:24:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 02:24:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:11,914 INFO L225 Difference]: With dead ends: 46 [2022-03-19 02:24:11,914 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 02:24:11,914 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:24:11,914 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:11,915 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 02:24:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-19 02:24:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-03-19 02:24:11,922 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-03-19 02:24:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:11,922 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-03-19 02:24:11,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-03-19 02:24:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 02:24:11,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:11,923 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:11,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:12,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 02:24:12,140 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 25 times [2022-03-19 02:24:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:12,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335795387] [2022-03-19 02:24:12,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:12,142 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:12,142 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 26 times [2022-03-19 02:24:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:12,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511907228] [2022-03-19 02:24:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:12,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511907228] [2022-03-19 02:24:12,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511907228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794899706] [2022-03-19 02:24:12,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:12,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:12,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:12,276 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:12,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 02:24:12,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 02:24:12,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:12,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:12,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794899706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:12,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:12,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-19 02:24:12,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:12,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335795387] [2022-03-19 02:24:12,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335795387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:12,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:12,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:24:12,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273476017] [2022-03-19 02:24:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:12,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:24:12,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:24:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-19 02:24:12,715 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:12,847 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-19 02:24:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:24:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 02:24:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:12,848 INFO L225 Difference]: With dead ends: 48 [2022-03-19 02:24:12,848 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 02:24:12,850 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 02:24:12,851 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:12,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 02:24:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-19 02:24:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-03-19 02:24:12,879 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-03-19 02:24:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:12,879 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-03-19 02:24:12,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-03-19 02:24:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 02:24:12,882 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:12,882 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:12,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 02:24:13,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 02:24:13,097 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 27 times [2022-03-19 02:24:13,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:13,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [874754222] [2022-03-19 02:24:13,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:13,099 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:13,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:13,099 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 28 times [2022-03-19 02:24:13,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:13,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714232873] [2022-03-19 02:24:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:13,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:13,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:13,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714232873] [2022-03-19 02:24:13,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714232873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:13,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168312841] [2022-03-19 02:24:13,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:13,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:13,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:13,251 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:13,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 02:24:13,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:13,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:24:13,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:13,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:13,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168312841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:13,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:13,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-19 02:24:13,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:13,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [874754222] [2022-03-19 02:24:13,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [874754222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:13,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:13,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 02:24:13,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569508473] [2022-03-19 02:24:13,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:13,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 02:24:13,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 02:24:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:24:13,659 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:13,837 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-19 02:24:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 02:24:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-19 02:24:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:13,837 INFO L225 Difference]: With dead ends: 50 [2022-03-19 02:24:13,837 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 02:24:13,838 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 02:24:13,839 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:13,839 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 02:24:13,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-19 02:24:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-03-19 02:24:13,842 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-03-19 02:24:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:13,843 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-03-19 02:24:13,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:13,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-03-19 02:24:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 02:24:13,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:13,843 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:13,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:14,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:14,052 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 29 times [2022-03-19 02:24:14,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:14,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097006494] [2022-03-19 02:24:14,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:14,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:14,054 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 30 times [2022-03-19 02:24:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050291150] [2022-03-19 02:24:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:14,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:14,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:14,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050291150] [2022-03-19 02:24:14,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050291150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878674693] [2022-03-19 02:24:14,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:14,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:14,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:14,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:14,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 02:24:14,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-19 02:24:14,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 02:24:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:14,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:14,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878674693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:14,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:14,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-19 02:24:14,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097006494] [2022-03-19 02:24:14,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097006494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:14,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:14,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 02:24:14,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945106299] [2022-03-19 02:24:14,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:14,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 02:24:14,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:14,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 02:24:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 02:24:14,869 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:15,067 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-19 02:24:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:24:15,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-19 02:24:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:15,067 INFO L225 Difference]: With dead ends: 52 [2022-03-19 02:24:15,067 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 02:24:15,068 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 02:24:15,069 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:15,069 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 02:24:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-19 02:24:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-19 02:24:15,074 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-03-19 02:24:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:15,074 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-19 02:24:15,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-19 02:24:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 02:24:15,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:15,074 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:15,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:15,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 02:24:15,275 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 31 times [2022-03-19 02:24:15,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:15,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [740142123] [2022-03-19 02:24:15,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:15,277 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:15,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:15,277 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 32 times [2022-03-19 02:24:15,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:15,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568587846] [2022-03-19 02:24:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:15,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:15,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:15,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568587846] [2022-03-19 02:24:15,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568587846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717216249] [2022-03-19 02:24:15,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:15,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:15,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:15,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:15,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 02:24:15,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:15,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:24:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:15,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:15,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717216249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:15,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:15,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-19 02:24:15,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:15,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [740142123] [2022-03-19 02:24:15,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [740142123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:15,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:15,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:24:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319973147] [2022-03-19 02:24:15,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:15,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:24:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:24:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 02:24:15,978 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:16,191 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-19 02:24:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 02:24:16,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-19 02:24:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:16,192 INFO L225 Difference]: With dead ends: 54 [2022-03-19 02:24:16,192 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 02:24:16,193 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 02:24:16,193 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:16,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 02:24:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-19 02:24:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-03-19 02:24:16,197 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-03-19 02:24:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:16,197 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-03-19 02:24:16,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-03-19 02:24:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 02:24:16,198 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:16,198 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:16,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:16,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 02:24:16,419 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 33 times [2022-03-19 02:24:16,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:16,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664176091] [2022-03-19 02:24:16,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:16,422 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:16,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 34 times [2022-03-19 02:24:16,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:16,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126396356] [2022-03-19 02:24:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:16,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:16,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:16,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126396356] [2022-03-19 02:24:16,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126396356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690354768] [2022-03-19 02:24:16,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:16,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:16,608 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:16,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 02:24:16,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:16,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 02:24:16,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:17,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690354768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:17,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:17,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-19 02:24:17,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:17,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664176091] [2022-03-19 02:24:17,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664176091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:17,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:17,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 02:24:17,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973261587] [2022-03-19 02:24:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:17,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 02:24:17,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 02:24:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 02:24:17,143 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:17,326 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-19 02:24:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 02:24:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-19 02:24:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:17,326 INFO L225 Difference]: With dead ends: 56 [2022-03-19 02:24:17,326 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 02:24:17,327 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 02:24:17,332 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:17,332 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 02:24:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-19 02:24:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-03-19 02:24:17,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-03-19 02:24:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:17,338 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-03-19 02:24:17,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-03-19 02:24:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 02:24:17,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:17,339 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:17,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:17,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:17,543 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 35 times [2022-03-19 02:24:17,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:17,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264782776] [2022-03-19 02:24:17,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:17,544 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:17,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 36 times [2022-03-19 02:24:17,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:17,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768682389] [2022-03-19 02:24:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:17,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:17,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768682389] [2022-03-19 02:24:17,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768682389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107845897] [2022-03-19 02:24:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:17,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:17,748 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:17,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 02:24:18,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-19 02:24:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 02:24:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:18,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:18,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107845897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:18,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:18,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-19 02:24:18,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:18,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264782776] [2022-03-19 02:24:18,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264782776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:18,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:18,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 02:24:18,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019630733] [2022-03-19 02:24:18,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:18,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 02:24:18,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 02:24:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 02:24:18,747 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:18,982 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-19 02:24:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 02:24:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-19 02:24:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:18,983 INFO L225 Difference]: With dead ends: 58 [2022-03-19 02:24:18,983 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 02:24:18,984 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:24:18,984 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:18,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 02:24:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-19 02:24:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-19 02:24:18,988 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-03-19 02:24:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:18,988 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-19 02:24:18,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-19 02:24:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 02:24:18,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:18,989 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:19,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:19,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:19,198 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 37 times [2022-03-19 02:24:19,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:19,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [692104395] [2022-03-19 02:24:19,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:19,199 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:19,199 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 38 times [2022-03-19 02:24:19,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:19,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398442557] [2022-03-19 02:24:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:19,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:19,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:19,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:19,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398442557] [2022-03-19 02:24:19,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398442557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:19,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526254147] [2022-03-19 02:24:19,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:19,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:19,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:19,428 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:19,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 02:24:19,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:19,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:19,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 02:24:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:19,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:20,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526254147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:20,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:20,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-19 02:24:20,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:20,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [692104395] [2022-03-19 02:24:20,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [692104395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:20,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:20,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 02:24:20,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182349] [2022-03-19 02:24:20,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:20,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 02:24:20,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 02:24:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 02:24:20,074 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:20,333 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-19 02:24:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 02:24:20,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-19 02:24:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:20,334 INFO L225 Difference]: With dead ends: 60 [2022-03-19 02:24:20,334 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 02:24:20,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 02:24:20,336 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:20,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 39 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 02:24:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-19 02:24:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-03-19 02:24:20,341 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-03-19 02:24:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:20,341 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-03-19 02:24:20,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-03-19 02:24:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 02:24:20,341 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:20,341 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:20,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:20,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:20,551 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 39 times [2022-03-19 02:24:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1781515330] [2022-03-19 02:24:20,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:20,553 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:20,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 40 times [2022-03-19 02:24:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201203620] [2022-03-19 02:24:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:20,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:20,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201203620] [2022-03-19 02:24:20,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201203620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820924236] [2022-03-19 02:24:20,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:20,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:20,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:20,768 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:20,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 02:24:20,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 02:24:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:20,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:21,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820924236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:21,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:21,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-19 02:24:21,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:21,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1781515330] [2022-03-19 02:24:21,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1781515330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:21,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:21,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 02:24:21,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532193562] [2022-03-19 02:24:21,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:21,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 02:24:21,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 02:24:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 02:24:21,486 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:21,770 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-19 02:24:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 02:24:21,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-19 02:24:21,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:21,771 INFO L225 Difference]: With dead ends: 62 [2022-03-19 02:24:21,771 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 02:24:21,772 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 02:24:21,773 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:21,773 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 02:24:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-19 02:24:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-03-19 02:24:21,778 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-03-19 02:24:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:21,778 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-03-19 02:24:21,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-03-19 02:24:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 02:24:21,778 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:21,778 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:21,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:21,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 02:24:21,987 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 41 times [2022-03-19 02:24:21,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:21,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1587338609] [2022-03-19 02:24:21,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:21,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:21,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 42 times [2022-03-19 02:24:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066482694] [2022-03-19 02:24:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:21,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:22,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:22,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066482694] [2022-03-19 02:24:22,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066482694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352817698] [2022-03-19 02:24:22,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:22,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:22,258 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:22,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 02:24:22,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-19 02:24:22,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:22,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 02:24:22,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:22,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:23,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352817698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:23,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:23,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-19 02:24:23,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:23,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1587338609] [2022-03-19 02:24:23,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1587338609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:23,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:23,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 02:24:23,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114553187] [2022-03-19 02:24:23,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:23,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 02:24:23,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 02:24:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 02:24:23,436 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:23,728 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-19 02:24:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 02:24:23,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-19 02:24:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:23,728 INFO L225 Difference]: With dead ends: 64 [2022-03-19 02:24:23,728 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 02:24:23,730 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 02:24:23,730 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:23,730 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 02:24:23,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-19 02:24:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-03-19 02:24:23,735 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-03-19 02:24:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:23,735 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-03-19 02:24:23,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-03-19 02:24:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 02:24:23,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:23,736 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:23,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:23,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-19 02:24:23,947 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 43 times [2022-03-19 02:24:23,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:23,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [344088702] [2022-03-19 02:24:23,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:23,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:23,948 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 44 times [2022-03-19 02:24:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:23,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055589724] [2022-03-19 02:24:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:24,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:24,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055589724] [2022-03-19 02:24:24,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055589724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209969831] [2022-03-19 02:24:24,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:24,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:24,210 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:24,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 02:24:24,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:24,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 02:24:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:24,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:24,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209969831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:24,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:24,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-19 02:24:24,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:24,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [344088702] [2022-03-19 02:24:24,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [344088702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:24,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:24,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 02:24:24,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620177897] [2022-03-19 02:24:24,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:24,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 02:24:24,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 02:24:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 02:24:24,958 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:25,268 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-19 02:24:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 02:24:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-19 02:24:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:25,269 INFO L225 Difference]: With dead ends: 66 [2022-03-19 02:24:25,269 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 02:24:25,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 02:24:25,270 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:25,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 02:24:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-19 02:24:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-19 02:24:25,275 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-03-19 02:24:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:25,275 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-19 02:24:25,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-19 02:24:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 02:24:25,276 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:25,276 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:25,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:25,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:25,494 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 45 times [2022-03-19 02:24:25,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:25,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [491314715] [2022-03-19 02:24:25,496 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:25,496 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:25,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 46 times [2022-03-19 02:24:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:25,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265521900] [2022-03-19 02:24:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:25,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:25,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265521900] [2022-03-19 02:24:25,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265521900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684144733] [2022-03-19 02:24:25,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:25,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:25,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:25,746 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:25,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 02:24:25,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 02:24:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:25,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:26,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684144733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:26,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:26,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-19 02:24:26,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:26,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [491314715] [2022-03-19 02:24:26,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [491314715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:26,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:26,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 02:24:26,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467575642] [2022-03-19 02:24:26,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:26,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 02:24:26,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:26,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 02:24:26,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 02:24:26,591 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:26,914 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-19 02:24:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 02:24:26,915 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-19 02:24:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:26,915 INFO L225 Difference]: With dead ends: 68 [2022-03-19 02:24:26,915 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 02:24:26,916 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 02:24:26,916 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:26,916 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 39 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 02:24:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-03-19 02:24:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-03-19 02:24:26,922 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-03-19 02:24:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:26,922 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-03-19 02:24:26,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-03-19 02:24:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 02:24:26,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:26,922 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:26,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:27,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:27,123 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:27,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 47 times [2022-03-19 02:24:27,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:27,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [484902376] [2022-03-19 02:24:27,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:27,124 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:27,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:27,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 48 times [2022-03-19 02:24:27,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:27,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584268319] [2022-03-19 02:24:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:27,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:27,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:27,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584268319] [2022-03-19 02:24:27,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584268319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751661083] [2022-03-19 02:24:27,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:27,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:27,446 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:27,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 02:24:28,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-19 02:24:28,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:28,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 02:24:28,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:28,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:29,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751661083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:29,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:29,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-19 02:24:29,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:29,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [484902376] [2022-03-19 02:24:29,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [484902376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:29,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:29,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 02:24:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258984321] [2022-03-19 02:24:29,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:29,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 02:24:29,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 02:24:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 02:24:29,095 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:29,435 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-19 02:24:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 02:24:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-19 02:24:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:29,436 INFO L225 Difference]: With dead ends: 70 [2022-03-19 02:24:29,436 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 02:24:29,437 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 02:24:29,437 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:29,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 02:24:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-19 02:24:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-03-19 02:24:29,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-03-19 02:24:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:29,444 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-03-19 02:24:29,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-03-19 02:24:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 02:24:29,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:29,445 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:29,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:29,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 02:24:29,646 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 49 times [2022-03-19 02:24:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:29,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [876021165] [2022-03-19 02:24:29,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:29,647 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:29,647 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 50 times [2022-03-19 02:24:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643500142] [2022-03-19 02:24:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:29,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:29,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:29,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:29,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643500142] [2022-03-19 02:24:29,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643500142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:29,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777956546] [2022-03-19 02:24:29,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:29,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:29,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:29,949 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:29,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 02:24:30,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:30,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 02:24:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:30,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:30,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777956546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:30,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:30,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-19 02:24:30,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:30,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [876021165] [2022-03-19 02:24:30,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [876021165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:30,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:30,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 02:24:30,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780910449] [2022-03-19 02:24:30,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:30,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 02:24:30,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 02:24:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 02:24:30,734 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:31,083 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-19 02:24:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 02:24:31,083 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-19 02:24:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:31,083 INFO L225 Difference]: With dead ends: 72 [2022-03-19 02:24:31,083 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 02:24:31,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 02:24:31,085 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:31,085 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 34 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 02:24:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-03-19 02:24:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-03-19 02:24:31,093 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-03-19 02:24:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:31,093 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-03-19 02:24:31,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-03-19 02:24:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 02:24:31,094 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:31,094 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:31,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 02:24:31,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 02:24:31,301 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 51 times [2022-03-19 02:24:31,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:31,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633066164] [2022-03-19 02:24:31,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:31,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:31,302 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:31,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 52 times [2022-03-19 02:24:31,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:31,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195964357] [2022-03-19 02:24:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:31,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:31,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:31,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195964357] [2022-03-19 02:24:31,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195964357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:31,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244043887] [2022-03-19 02:24:31,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:31,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:31,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:31,624 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:31,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 02:24:31,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 02:24:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:31,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:32,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244043887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:32,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:32,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-19 02:24:32,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:32,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633066164] [2022-03-19 02:24:32,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633066164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:32,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:32,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 02:24:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39691145] [2022-03-19 02:24:32,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:32,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 02:24:32,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:32,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 02:24:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 02:24:32,409 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:32,691 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-19 02:24:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 02:24:32,691 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-19 02:24:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:32,692 INFO L225 Difference]: With dead ends: 74 [2022-03-19 02:24:32,692 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 02:24:32,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 02:24:32,696 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:32,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 02:24:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-03-19 02:24:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-03-19 02:24:32,703 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-03-19 02:24:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:32,704 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-03-19 02:24:32,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-03-19 02:24:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 02:24:32,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:32,704 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:32,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:32,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 02:24:32,918 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 53 times [2022-03-19 02:24:32,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:32,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304963883] [2022-03-19 02:24:32,919 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:32,919 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:32,919 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 54 times [2022-03-19 02:24:32,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056315210] [2022-03-19 02:24:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:33,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:33,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056315210] [2022-03-19 02:24:33,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056315210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231704095] [2022-03-19 02:24:33,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:33,138 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:33,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 02:24:35,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-19 02:24:35,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:35,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 02:24:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:35,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:35,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231704095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:35,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:35,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-19 02:24:35,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:35,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304963883] [2022-03-19 02:24:35,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304963883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:35,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:35,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 02:24:35,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690776620] [2022-03-19 02:24:35,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:35,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 02:24:35,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 02:24:35,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 02:24:35,867 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:36,162 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-19 02:24:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 02:24:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-19 02:24:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:36,163 INFO L225 Difference]: With dead ends: 76 [2022-03-19 02:24:36,163 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 02:24:36,165 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 02:24:36,165 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:36,166 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:24:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 02:24:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-19 02:24:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-19 02:24:36,174 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-03-19 02:24:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:36,174 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-19 02:24:36,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-19 02:24:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 02:24:36,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:36,175 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:36,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:36,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 02:24:36,376 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 55 times [2022-03-19 02:24:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [612724846] [2022-03-19 02:24:36,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:36,378 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:36,378 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 56 times [2022-03-19 02:24:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:36,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108402435] [2022-03-19 02:24:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:36,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:36,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:36,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108402435] [2022-03-19 02:24:36,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108402435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084723080] [2022-03-19 02:24:36,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:36,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:36,796 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:36,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 02:24:36,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:36,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 02:24:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:37,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:37,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084723080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:37,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:37,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-19 02:24:37,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:37,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [612724846] [2022-03-19 02:24:37,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [612724846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:37,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:37,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 02:24:37,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748962916] [2022-03-19 02:24:37,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:37,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 02:24:37,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 02:24:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 02:24:37,927 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:38,360 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-19 02:24:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 02:24:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 02:24:38,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:38,361 INFO L225 Difference]: With dead ends: 78 [2022-03-19 02:24:38,361 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 02:24:38,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 02:24:38,363 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:38,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 02:24:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-19 02:24:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-03-19 02:24:38,371 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-03-19 02:24:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:38,372 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-03-19 02:24:38,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-03-19 02:24:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 02:24:38,372 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:38,372 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:38,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:38,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:38,586 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 57 times [2022-03-19 02:24:38,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:38,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157425532] [2022-03-19 02:24:38,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:38,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:38,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 58 times [2022-03-19 02:24:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:38,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949424652] [2022-03-19 02:24:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:38,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949424652] [2022-03-19 02:24:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949424652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139709121] [2022-03-19 02:24:38,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:38,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:38,948 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:38,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 02:24:39,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:39,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 02:24:39,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:39,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:40,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139709121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:40,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:40,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-19 02:24:40,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157425532] [2022-03-19 02:24:40,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157425532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:40,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:40,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 02:24:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453020872] [2022-03-19 02:24:40,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:40,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 02:24:40,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 02:24:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 02:24:40,164 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:40,600 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-19 02:24:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 02:24:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-19 02:24:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:40,601 INFO L225 Difference]: With dead ends: 80 [2022-03-19 02:24:40,601 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 02:24:40,602 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 02:24:40,602 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:40,602 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 02:24:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-03-19 02:24:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-03-19 02:24:40,610 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-03-19 02:24:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:40,610 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-03-19 02:24:40,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-03-19 02:24:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 02:24:40,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:40,610 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:40,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:40,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:40,823 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:40,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 59 times [2022-03-19 02:24:40,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:40,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1101587612] [2022-03-19 02:24:40,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:40,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:40,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 60 times [2022-03-19 02:24:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343966798] [2022-03-19 02:24:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:40,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:41,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:41,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:41,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343966798] [2022-03-19 02:24:41,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343966798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:41,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46968678] [2022-03-19 02:24:41,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:41,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:41,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:41,133 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:41,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 02:24:44,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-19 02:24:44,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 02:24:44,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:44,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:45,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46968678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:45,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:45,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-19 02:24:45,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:45,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1101587612] [2022-03-19 02:24:45,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1101587612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:45,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:45,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 02:24:45,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226353428] [2022-03-19 02:24:45,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:45,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 02:24:45,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 02:24:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 02:24:45,281 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:45,774 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-19 02:24:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 02:24:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-19 02:24:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:45,774 INFO L225 Difference]: With dead ends: 82 [2022-03-19 02:24:45,774 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 02:24:45,776 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 02:24:45,776 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:45,776 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 29 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 02:24:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-03-19 02:24:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-03-19 02:24:45,786 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-03-19 02:24:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:45,786 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-03-19 02:24:45,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-03-19 02:24:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 02:24:45,786 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:45,786 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:45,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:46,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-19 02:24:46,001 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 61 times [2022-03-19 02:24:46,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:46,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662903076] [2022-03-19 02:24:46,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:46,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:46,003 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 62 times [2022-03-19 02:24:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51534489] [2022-03-19 02:24:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:46,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:46,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:46,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51534489] [2022-03-19 02:24:46,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51534489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:46,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437893705] [2022-03-19 02:24:46,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:46,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:46,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:46,300 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:46,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 02:24:46,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:46,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 02:24:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:46,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:47,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437893705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:47,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:47,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-19 02:24:47,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:47,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662903076] [2022-03-19 02:24:47,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662903076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:47,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:47,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 02:24:47,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748303868] [2022-03-19 02:24:47,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:47,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 02:24:47,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 02:24:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 02:24:47,191 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:47,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:47,604 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-19 02:24:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 02:24:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-19 02:24:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:47,605 INFO L225 Difference]: With dead ends: 84 [2022-03-19 02:24:47,605 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 02:24:47,606 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 02:24:47,606 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:47,606 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 02:24:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-03-19 02:24:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-03-19 02:24:47,614 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-03-19 02:24:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:47,614 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-03-19 02:24:47,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-03-19 02:24:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 02:24:47,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:47,615 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:47,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:47,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:47,828 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 63 times [2022-03-19 02:24:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:47,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545975343] [2022-03-19 02:24:47,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:47,830 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:47,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:47,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 64 times [2022-03-19 02:24:47,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:47,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877639705] [2022-03-19 02:24:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:48,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877639705] [2022-03-19 02:24:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877639705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035912462] [2022-03-19 02:24:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:48,252 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:48,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 02:24:48,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 02:24:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:48,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:49,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035912462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:49,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:49,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-19 02:24:49,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:49,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545975343] [2022-03-19 02:24:49,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545975343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:49,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:49,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 02:24:49,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595907985] [2022-03-19 02:24:49,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:49,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 02:24:49,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:49,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 02:24:49,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 02:24:49,660 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:50,210 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-19 02:24:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 02:24:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-19 02:24:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:50,211 INFO L225 Difference]: With dead ends: 86 [2022-03-19 02:24:50,211 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 02:24:50,212 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 02:24:50,212 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:50,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:50,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 02:24:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-19 02:24:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-19 02:24:50,221 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-03-19 02:24:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:50,221 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-19 02:24:50,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-19 02:24:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-19 02:24:50,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:50,221 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:50,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 02:24:50,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:50,435 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 65 times [2022-03-19 02:24:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:50,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [688453149] [2022-03-19 02:24:50,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:50,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:50,437 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 66 times [2022-03-19 02:24:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:50,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207356772] [2022-03-19 02:24:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:50,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207356772] [2022-03-19 02:24:50,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207356772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612436067] [2022-03-19 02:24:50,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:50,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:50,758 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:50,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 02:24:56,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-19 02:24:56,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 02:24:56,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:56,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:57,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612436067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:57,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:57,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-19 02:24:57,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:57,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [688453149] [2022-03-19 02:24:57,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [688453149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:57,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:57,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 02:24:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958120545] [2022-03-19 02:24:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:57,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 02:24:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 02:24:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 02:24:57,726 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:58,126 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-19 02:24:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 02:24:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-19 02:24:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:58,127 INFO L225 Difference]: With dead ends: 88 [2022-03-19 02:24:58,127 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 02:24:58,128 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 02:24:58,129 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:58,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 34 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:24:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 02:24:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-03-19 02:24:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-03-19 02:24:58,138 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-03-19 02:24:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:58,139 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-03-19 02:24:58,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:24:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-03-19 02:24:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 02:24:58,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:58,139 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:24:58,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:58,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 02:24:58,340 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 67 times [2022-03-19 02:24:58,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:58,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260163459] [2022-03-19 02:24:58,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:58,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:58,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 68 times [2022-03-19 02:24:58,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:58,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043714789] [2022-03-19 02:24:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:58,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:58,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:58,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043714789] [2022-03-19 02:24:58,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043714789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588457384] [2022-03-19 02:24:58,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:58,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:58,693 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:24:58,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 02:24:58,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 02:24:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:58,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:24:59,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588457384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:59,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:59,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-19 02:24:59,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260163459] [2022-03-19 02:24:59,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260163459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:59,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:59,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 02:24:59,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666310995] [2022-03-19 02:24:59,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:59,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 02:24:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 02:24:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 02:24:59,737 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:00,109 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-19 02:25:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 02:25:00,109 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-19 02:25:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:00,110 INFO L225 Difference]: With dead ends: 90 [2022-03-19 02:25:00,110 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 02:25:00,111 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 02:25:00,111 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:00,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 02:25:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-03-19 02:25:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-03-19 02:25:00,121 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-03-19 02:25:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:00,121 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-03-19 02:25:00,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-03-19 02:25:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 02:25:00,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:00,121 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:00,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 02:25:00,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 02:25:00,338 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 69 times [2022-03-19 02:25:00,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:00,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756313501] [2022-03-19 02:25:00,340 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:00,340 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:00,340 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 70 times [2022-03-19 02:25:00,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:00,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808362721] [2022-03-19 02:25:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:00,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:00,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808362721] [2022-03-19 02:25:00,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808362721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:00,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745249471] [2022-03-19 02:25:00,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:25:00,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:00,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:00,827 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:00,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 02:25:01,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:25:01,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:01,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 02:25:01,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:01,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:02,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745249471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:02,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:02,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-19 02:25:02,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756313501] [2022-03-19 02:25:02,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756313501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:02,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:02,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 02:25:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202653719] [2022-03-19 02:25:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:02,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 02:25:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 02:25:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 02:25:02,503 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:03,147 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-19 02:25:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 02:25:03,147 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-19 02:25:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:03,148 INFO L225 Difference]: With dead ends: 92 [2022-03-19 02:25:03,148 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 02:25:03,149 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 02:25:03,150 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:03,150 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 34 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 02:25:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-03-19 02:25:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-03-19 02:25:03,160 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-03-19 02:25:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:03,160 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-03-19 02:25:03,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-03-19 02:25:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 02:25:03,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:03,160 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:03,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 02:25:03,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 02:25:03,379 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 71 times [2022-03-19 02:25:03,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:03,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166436091] [2022-03-19 02:25:03,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:03,381 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:03,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:03,381 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 72 times [2022-03-19 02:25:03,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:03,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453966373] [2022-03-19 02:25:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:03,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:03,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:03,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453966373] [2022-03-19 02:25:03,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453966373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:03,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458030196] [2022-03-19 02:25:03,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:25:03,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:03,912 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:03,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 02:25:14,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-19 02:25:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:14,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 02:25:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:14,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:15,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458030196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:15,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:15,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-19 02:25:15,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166436091] [2022-03-19 02:25:15,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166436091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:15,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:15,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 02:25:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607250939] [2022-03-19 02:25:15,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:15,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 02:25:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 02:25:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 02:25:15,444 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:15,842 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-19 02:25:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 02:25:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-19 02:25:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:15,843 INFO L225 Difference]: With dead ends: 94 [2022-03-19 02:25:15,843 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 02:25:15,845 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-19 02:25:15,845 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:15,848 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 34 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:25:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 02:25:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-03-19 02:25:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-03-19 02:25:15,867 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-03-19 02:25:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:15,867 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-03-19 02:25:15,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-03-19 02:25:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 02:25:15,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:15,870 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:15,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 02:25:16,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:16,095 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:16,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 73 times [2022-03-19 02:25:16,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:16,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341791098] [2022-03-19 02:25:16,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:16,097 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:16,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 74 times [2022-03-19 02:25:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:16,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369878249] [2022-03-19 02:25:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:16,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:16,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369878249] [2022-03-19 02:25:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369878249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211335111] [2022-03-19 02:25:16,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:25:16,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:16,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:16,566 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:16,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 02:25:16,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:25:16,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 02:25:16,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:16,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:18,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211335111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:18,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:18,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-19 02:25:18,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341791098] [2022-03-19 02:25:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341791098] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:18,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:18,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 02:25:18,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978004341] [2022-03-19 02:25:18,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:18,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 02:25:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:18,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 02:25:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 02:25:18,260 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:18,695 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-19 02:25:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 02:25:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-19 02:25:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:18,698 INFO L225 Difference]: With dead ends: 96 [2022-03-19 02:25:18,699 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 02:25:18,701 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 02:25:18,701 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:18,702 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 02:25:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-19 02:25:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-19 02:25:18,727 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-03-19 02:25:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:18,727 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-19 02:25:18,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-19 02:25:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-19 02:25:18,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:18,728 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:18,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 02:25:18,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 02:25:18,946 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 75 times [2022-03-19 02:25:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:18,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519499373] [2022-03-19 02:25:18,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:18,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:18,948 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:18,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 76 times [2022-03-19 02:25:18,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:18,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464758478] [2022-03-19 02:25:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:18,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:19,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:19,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464758478] [2022-03-19 02:25:19,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464758478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:19,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134576727] [2022-03-19 02:25:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:25:19,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:19,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:19,568 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:19,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 02:25:19,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:25:19,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 02:25:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:19,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:21,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134576727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:21,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:21,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-19 02:25:21,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:21,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519499373] [2022-03-19 02:25:21,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519499373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:21,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:21,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 02:25:21,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795883522] [2022-03-19 02:25:21,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:21,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 02:25:21,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:21,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 02:25:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 02:25:21,528 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:22,075 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-19 02:25:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 02:25:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-19 02:25:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:22,076 INFO L225 Difference]: With dead ends: 98 [2022-03-19 02:25:22,076 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 02:25:22,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-03-19 02:25:22,081 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:22,081 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 02:25:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-03-19 02:25:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-19 02:25:22,093 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-03-19 02:25:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:22,093 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-19 02:25:22,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-19 02:25:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-19 02:25:22,094 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:22,094 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:22,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-19 02:25:22,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 02:25:22,312 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 77 times [2022-03-19 02:25:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:22,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [194315772] [2022-03-19 02:25:22,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:22,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:22,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 78 times [2022-03-19 02:25:22,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:22,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500090107] [2022-03-19 02:25:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:22,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:22,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:22,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:22,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500090107] [2022-03-19 02:25:22,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500090107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:22,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219664124] [2022-03-19 02:25:22,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:25:22,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:22,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:22,683 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:22,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 02:25:31,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-19 02:25:31,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 02:25:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:31,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:33,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219664124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:33,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:33,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-19 02:25:33,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [194315772] [2022-03-19 02:25:33,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [194315772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:33,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:33,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 02:25:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583123505] [2022-03-19 02:25:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:33,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 02:25:33,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:33,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 02:25:33,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 02:25:33,041 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:33,513 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-19 02:25:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 02:25:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-19 02:25:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:33,514 INFO L225 Difference]: With dead ends: 100 [2022-03-19 02:25:33,514 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 02:25:33,516 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 02:25:33,517 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:33,517 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 02:25:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-03-19 02:25:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-03-19 02:25:33,529 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-03-19 02:25:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:33,530 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-03-19 02:25:33,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-03-19 02:25:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 02:25:33,530 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:33,530 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:33,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-19 02:25:33,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:33,734 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:33,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:33,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 79 times [2022-03-19 02:25:33,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:33,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [701666428] [2022-03-19 02:25:33,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:33,736 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:33,736 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:33,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 80 times [2022-03-19 02:25:33,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:33,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420478635] [2022-03-19 02:25:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:33,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:34,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:34,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:34,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420478635] [2022-03-19 02:25:34,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420478635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:34,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348792499] [2022-03-19 02:25:34,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:25:34,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:34,334 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:34,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 02:25:34,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:25:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 02:25:34,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:34,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:35,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348792499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:35,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:35,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-19 02:25:35,815 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [701666428] [2022-03-19 02:25:35,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [701666428] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:35,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:35,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 02:25:35,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876457257] [2022-03-19 02:25:35,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:35,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 02:25:35,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 02:25:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 02:25:35,817 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:36,575 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-19 02:25:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 02:25:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-19 02:25:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:36,576 INFO L225 Difference]: With dead ends: 102 [2022-03-19 02:25:36,576 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 02:25:36,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 02:25:36,580 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:36,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 02:25:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-03-19 02:25:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-03-19 02:25:36,593 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-03-19 02:25:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:36,594 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-03-19 02:25:36,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-03-19 02:25:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 02:25:36,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:36,595 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:36,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 02:25:36,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-19 02:25:36,813 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:36,813 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 81 times [2022-03-19 02:25:36,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:36,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889883918] [2022-03-19 02:25:36,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:36,815 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:36,815 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:36,815 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 82 times [2022-03-19 02:25:36,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:36,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189738378] [2022-03-19 02:25:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:36,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:37,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:37,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189738378] [2022-03-19 02:25:37,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189738378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129224403] [2022-03-19 02:25:37,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:25:37,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:37,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:37,520 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:37,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 02:25:37,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:25:37,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 02:25:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:37,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:39,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129224403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:39,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:39,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-19 02:25:39,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889883918] [2022-03-19 02:25:39,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889883918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:39,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:39,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 02:25:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528827163] [2022-03-19 02:25:39,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:39,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 02:25:39,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 02:25:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 02:25:39,680 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:40,485 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-19 02:25:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 02:25:40,486 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-19 02:25:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:40,486 INFO L225 Difference]: With dead ends: 104 [2022-03-19 02:25:40,486 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 02:25:40,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-03-19 02:25:40,488 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:40,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 02:25:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-19 02:25:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-03-19 02:25:40,501 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-03-19 02:25:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:40,501 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-03-19 02:25:40,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-03-19 02:25:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 02:25:40,501 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:40,502 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:40,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 02:25:40,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:40,707 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 83 times [2022-03-19 02:25:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [695557390] [2022-03-19 02:25:40,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:40,711 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:40,711 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 84 times [2022-03-19 02:25:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:40,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19170233] [2022-03-19 02:25:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:41,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19170233] [2022-03-19 02:25:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19170233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582178920] [2022-03-19 02:25:41,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:25:41,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:41,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:41,391 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:41,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 02:25:53,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-19 02:25:53,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:53,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 02:25:53,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:53,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:55,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582178920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:55,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:55,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-19 02:25:55,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:55,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [695557390] [2022-03-19 02:25:55,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [695557390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:55,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:55,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 02:25:55,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103862157] [2022-03-19 02:25:55,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:55,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 02:25:55,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:55,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 02:25:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 02:25:55,336 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:56,176 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-19 02:25:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 02:25:56,176 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-19 02:25:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:56,177 INFO L225 Difference]: With dead ends: 106 [2022-03-19 02:25:56,177 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 02:25:56,179 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-19 02:25:56,179 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:56,179 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 02:25:56,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-19 02:25:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-19 02:25:56,193 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-03-19 02:25:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:56,193 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-19 02:25:56,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-19 02:25:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-19 02:25:56,194 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:56,194 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:56,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 02:25:56,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:56,409 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 85 times [2022-03-19 02:25:56,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692987922] [2022-03-19 02:25:56,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:56,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:56,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 86 times [2022-03-19 02:25:56,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441178487] [2022-03-19 02:25:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:56,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:57,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:57,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:57,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441178487] [2022-03-19 02:25:57,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441178487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:57,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069964492] [2022-03-19 02:25:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:25:57,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:57,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:57,180 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:25:57,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 02:25:57,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:25:57,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 02:25:57,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:57,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:25:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069964492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:58,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:58,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-19 02:25:58,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692987922] [2022-03-19 02:25:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692987922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:58,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:58,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 02:25:58,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261736147] [2022-03-19 02:25:58,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:58,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 02:25:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 02:25:58,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 02:25:58,692 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:59,323 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-19 02:25:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 02:25:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-19 02:25:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:59,324 INFO L225 Difference]: With dead ends: 108 [2022-03-19 02:25:59,324 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 02:25:59,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 02:25:59,327 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:59,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 44 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:25:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 02:25:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-03-19 02:25:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-03-19 02:25:59,341 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-03-19 02:25:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:59,341 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-03-19 02:25:59,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:25:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-03-19 02:25:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 02:25:59,341 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:59,341 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:25:59,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 02:25:59,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 02:25:59,548 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 87 times [2022-03-19 02:25:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:59,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [362998101] [2022-03-19 02:25:59,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:59,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:59,550 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 88 times [2022-03-19 02:25:59,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:59,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968192657] [2022-03-19 02:25:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:59,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:00,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:00,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:00,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968192657] [2022-03-19 02:26:00,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968192657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:00,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498805707] [2022-03-19 02:26:00,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:26:00,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:00,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:00,295 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:26:00,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 02:26:00,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:26:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:00,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 02:26:00,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:00,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:01,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498805707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:01,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:01,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-19 02:26:01,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:01,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [362998101] [2022-03-19 02:26:01,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [362998101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:01,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:01,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 02:26:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319950950] [2022-03-19 02:26:01,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:01,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 02:26:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 02:26:01,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 02:26:01,769 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:02,351 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-19 02:26:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 02:26:02,351 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-19 02:26:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:02,351 INFO L225 Difference]: With dead ends: 110 [2022-03-19 02:26:02,352 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 02:26:02,354 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-03-19 02:26:02,356 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:02,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 39 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:26:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 02:26:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-03-19 02:26:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-03-19 02:26:02,389 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-03-19 02:26:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:02,389 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-03-19 02:26:02,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-03-19 02:26:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:26:02,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:02,390 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:26:02,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 02:26:02,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 02:26:02,603 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:02,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:02,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 89 times [2022-03-19 02:26:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:02,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1781647131] [2022-03-19 02:26:02,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:02,609 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:02,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:02,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 90 times [2022-03-19 02:26:02,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:02,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090402974] [2022-03-19 02:26:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:02,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:03,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:03,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090402974] [2022-03-19 02:26:03,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090402974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426420851] [2022-03-19 02:26:03,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:26:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:03,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:03,253 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:26:03,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 02:26:27,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-19 02:26:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 02:26:27,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:27,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:29,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426420851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:29,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:29,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-19 02:26:29,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1781647131] [2022-03-19 02:26:29,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1781647131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:29,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:29,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 02:26:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429137440] [2022-03-19 02:26:29,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:29,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 02:26:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 02:26:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 02:26:29,464 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:30,375 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-19 02:26:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 02:26:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 02:26:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:30,376 INFO L225 Difference]: With dead ends: 112 [2022-03-19 02:26:30,376 INFO L226 Difference]: Without dead ends: 106 [2022-03-19 02:26:30,378 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-19 02:26:30,378 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:30,378 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 44 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:26:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-19 02:26:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-03-19 02:26:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-03-19 02:26:30,393 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-03-19 02:26:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:30,393 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-03-19 02:26:30,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-03-19 02:26:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 02:26:30,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:30,394 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:26:30,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 02:26:30,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-19 02:26:30,607 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:30,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 91 times [2022-03-19 02:26:30,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:30,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [15897105] [2022-03-19 02:26:30,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:30,609 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:30,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:30,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 92 times [2022-03-19 02:26:30,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:30,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552528475] [2022-03-19 02:26:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:30,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:31,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552528475] [2022-03-19 02:26:31,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552528475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:31,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263832382] [2022-03-19 02:26:31,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:26:31,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:31,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:31,407 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:26:31,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 02:26:31,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:26:31,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:31,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 02:26:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:31,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263832382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:33,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:33,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-19 02:26:33,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [15897105] [2022-03-19 02:26:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [15897105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:33,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:33,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 02:26:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177349996] [2022-03-19 02:26:33,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:33,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 02:26:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 02:26:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 02:26:33,325 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:33,966 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-19 02:26:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 02:26:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-19 02:26:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:33,967 INFO L225 Difference]: With dead ends: 114 [2022-03-19 02:26:33,967 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 02:26:33,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-19 02:26:33,969 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:33,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 39 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:26:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 02:26:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-19 02:26:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-03-19 02:26:33,985 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-03-19 02:26:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:33,985 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-03-19 02:26:33,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-03-19 02:26:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-19 02:26:33,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:33,986 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:26:34,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 02:26:34,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:34,204 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 93 times [2022-03-19 02:26:34,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:34,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [461537944] [2022-03-19 02:26:34,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:34,205 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:34,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:34,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 94 times [2022-03-19 02:26:34,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:34,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529369824] [2022-03-19 02:26:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:34,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:34,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:34,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:34,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529369824] [2022-03-19 02:26:34,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529369824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:34,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762620507] [2022-03-19 02:26:34,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:26:34,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:34,962 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:26:34,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 02:26:35,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:26:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:35,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 02:26:35,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:35,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:37,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762620507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:37,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:37,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-19 02:26:37,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [461537944] [2022-03-19 02:26:37,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [461537944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:37,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:37,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 02:26:37,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113140639] [2022-03-19 02:26:37,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:37,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 02:26:37,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:37,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 02:26:37,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 02:26:37,129 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:38,029 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-19 02:26:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 02:26:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-03-19 02:26:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:38,030 INFO L225 Difference]: With dead ends: 116 [2022-03-19 02:26:38,030 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 02:26:38,031 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-03-19 02:26:38,031 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:38,031 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 24 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:26:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 02:26:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-19 02:26:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-19 02:26:38,047 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-03-19 02:26:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:38,047 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-19 02:26:38,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:26:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-19 02:26:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-19 02:26:38,048 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:38,048 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:26:38,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 02:26:38,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 02:26:38,264 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 95 times [2022-03-19 02:26:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:38,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089684501] [2022-03-19 02:26:38,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:38,265 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:38,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 96 times [2022-03-19 02:26:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:38,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934019347] [2022-03-19 02:26:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:38,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:38,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:26:38,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:38,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934019347] [2022-03-19 02:26:38,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934019347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:38,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678465081] [2022-03-19 02:26:38,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:26:38,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:38,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:38,780 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:26:38,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 02:27:12,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-19 02:27:12,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:12,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 02:27:12,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:12,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:14,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678465081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:14,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:14,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-19 02:27:14,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:14,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089684501] [2022-03-19 02:27:14,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089684501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:14,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:14,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 02:27:14,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111011442] [2022-03-19 02:27:14,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:14,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 02:27:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 02:27:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 02:27:14,596 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:15,388 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-19 02:27:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 02:27:15,388 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-03-19 02:27:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:15,389 INFO L225 Difference]: With dead ends: 118 [2022-03-19 02:27:15,389 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 02:27:15,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-19 02:27:15,390 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:27:15,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 39 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:27:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 02:27:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-03-19 02:27:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-03-19 02:27:15,406 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2022-03-19 02:27:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:15,406 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-03-19 02:27:15,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-03-19 02:27:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 02:27:15,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:15,407 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:27:15,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-19 02:27:15,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 02:27:15,615 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 97 times [2022-03-19 02:27:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:15,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545738597] [2022-03-19 02:27:15,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:15,617 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:15,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 98 times [2022-03-19 02:27:15,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:15,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883728030] [2022-03-19 02:27:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:16,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:16,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:16,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883728030] [2022-03-19 02:27:16,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883728030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:16,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905398869] [2022-03-19 02:27:16,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:27:16,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:16,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:16,498 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:27:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 02:27:16,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:27:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:16,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 02:27:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:16,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:19,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905398869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:19,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:19,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-19 02:27:19,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545738597] [2022-03-19 02:27:19,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545738597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:19,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:19,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 02:27:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828022426] [2022-03-19 02:27:19,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:19,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 02:27:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:19,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 02:27:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 02:27:19,488 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:20,476 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-19 02:27:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 02:27:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-03-19 02:27:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:20,477 INFO L225 Difference]: With dead ends: 120 [2022-03-19 02:27:20,477 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 02:27:20,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 02:27:20,479 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:27:20,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 34 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:27:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 02:27:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-03-19 02:27:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-03-19 02:27:20,518 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2022-03-19 02:27:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:20,519 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-03-19 02:27:20,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-03-19 02:27:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-19 02:27:20,519 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:20,519 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:27:20,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 02:27:20,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:20,734 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 99 times [2022-03-19 02:27:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542944344] [2022-03-19 02:27:20,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:20,735 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:20,735 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 100 times [2022-03-19 02:27:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:20,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197705833] [2022-03-19 02:27:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:21,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:21,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:21,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197705833] [2022-03-19 02:27:21,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197705833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:21,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475896866] [2022-03-19 02:27:21,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:27:21,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:21,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:21,413 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:27:21,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 02:27:21,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:27:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 02:27:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:21,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:24,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475896866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:24,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:24,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-19 02:27:24,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542944344] [2022-03-19 02:27:24,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542944344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:24,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:24,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-19 02:27:24,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491569594] [2022-03-19 02:27:24,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:24,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-19 02:27:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-19 02:27:24,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 02:27:24,048 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:24,933 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-19 02:27:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 02:27:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-03-19 02:27:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:24,934 INFO L225 Difference]: With dead ends: 122 [2022-03-19 02:27:24,934 INFO L226 Difference]: Without dead ends: 116 [2022-03-19 02:27:24,936 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-03-19 02:27:24,937 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:27:24,937 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:27:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-19 02:27:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-19 02:27:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-03-19 02:27:24,964 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2022-03-19 02:27:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:24,964 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-03-19 02:27:24,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:27:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-03-19 02:27:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-19 02:27:24,964 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:24,964 INFO L500 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:27:24,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-19 02:27:25,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-19 02:27:25,179 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 101 times [2022-03-19 02:27:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1669068451] [2022-03-19 02:27:25,181 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:25,181 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:25,181 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 102 times [2022-03-19 02:27:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:25,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832596507] [2022-03-19 02:27:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:25,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:25,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:27:25,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:25,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832596507] [2022-03-19 02:27:25,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832596507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:25,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568565990] [2022-03-19 02:27:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:27:25,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:25,737 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:27:25,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 02:28:18,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-19 02:28:18,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 02:28:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:18,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:20,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568565990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:20,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:20,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-19 02:28:20,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1669068451] [2022-03-19 02:28:20,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1669068451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:20,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:20,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 02:28:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518384921] [2022-03-19 02:28:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:20,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 02:28:20,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 02:28:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 02:28:20,597 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:21,368 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-19 02:28:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 02:28:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-19 02:28:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:21,369 INFO L225 Difference]: With dead ends: 124 [2022-03-19 02:28:21,369 INFO L226 Difference]: Without dead ends: 118 [2022-03-19 02:28:21,370 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-19 02:28:21,370 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:21,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 44 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:28:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-19 02:28:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-03-19 02:28:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-03-19 02:28:21,403 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2022-03-19 02:28:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:21,403 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-03-19 02:28:21,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-03-19 02:28:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 02:28:21,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:21,404 INFO L500 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:28:21,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 02:28:21,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:21,623 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 103 times [2022-03-19 02:28:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:21,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66821618] [2022-03-19 02:28:21,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:21,625 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:21,625 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 104 times [2022-03-19 02:28:21,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:21,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261183535] [2022-03-19 02:28:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:21,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:22,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261183535] [2022-03-19 02:28:22,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261183535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225752886] [2022-03-19 02:28:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:28:22,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:22,388 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:28:22,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 02:28:22,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:28:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 02:28:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:22,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:24,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225752886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:24,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:24,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-19 02:28:24,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:24,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66821618] [2022-03-19 02:28:24,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66821618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:24,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:24,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-19 02:28:24,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817944225] [2022-03-19 02:28:24,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:24,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 02:28:24,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 02:28:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 02:28:24,695 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:25,889 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-19 02:28:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 02:28:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-03-19 02:28:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:25,890 INFO L225 Difference]: With dead ends: 126 [2022-03-19 02:28:25,890 INFO L226 Difference]: Without dead ends: 120 [2022-03-19 02:28:25,891 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-19 02:28:25,891 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:25,891 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:28:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-19 02:28:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-03-19 02:28:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-03-19 02:28:25,910 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2022-03-19 02:28:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:25,910 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-03-19 02:28:25,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-03-19 02:28:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-19 02:28:25,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:25,911 INFO L500 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:28:25,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 02:28:26,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-19 02:28:26,125 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 105 times [2022-03-19 02:28:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:26,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282148963] [2022-03-19 02:28:26,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:26,126 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:26,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 106 times [2022-03-19 02:28:26,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:26,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044585387] [2022-03-19 02:28:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:26,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044585387] [2022-03-19 02:28:26,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044585387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273303794] [2022-03-19 02:28:26,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:28:26,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:26,777 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:28:26,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 02:28:27,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:28:27,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 02:28:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:27,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:29,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273303794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:29,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:29,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-19 02:28:29,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282148963] [2022-03-19 02:28:29,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282148963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:29,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:29,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-19 02:28:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049252561] [2022-03-19 02:28:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:29,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 02:28:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:29,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 02:28:29,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 02:28:29,557 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:30,344 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-19 02:28:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 02:28:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-03-19 02:28:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:30,345 INFO L225 Difference]: With dead ends: 128 [2022-03-19 02:28:30,345 INFO L226 Difference]: Without dead ends: 122 [2022-03-19 02:28:30,347 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-03-19 02:28:30,347 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:30,347 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 29 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:28:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-19 02:28:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-03-19 02:28:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-03-19 02:28:30,367 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2022-03-19 02:28:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:30,367 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-03-19 02:28:30,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:28:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-03-19 02:28:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-19 02:28:30,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:30,368 INFO L500 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:28:30,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 02:28:30,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-19 02:28:30,586 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 107 times [2022-03-19 02:28:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141103034] [2022-03-19 02:28:30,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:30,588 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:30,588 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 108 times [2022-03-19 02:28:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348527403] [2022-03-19 02:28:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:30,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:28:31,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:31,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348527403] [2022-03-19 02:28:31,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348527403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:31,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919275812] [2022-03-19 02:28:31,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:28:31,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:31,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:31,365 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:28:31,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 02:29:22,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-19 02:29:22,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:22,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 02:29:22,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:23,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:26,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919275812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:26,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-19 02:29:26,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:26,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141103034] [2022-03-19 02:29:26,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141103034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:26,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-19 02:29:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555323173] [2022-03-19 02:29:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:26,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-19 02:29:26,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-19 02:29:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 02:29:26,126 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:27,459 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-19 02:29:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 02:29:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-03-19 02:29:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:27,460 INFO L225 Difference]: With dead ends: 130 [2022-03-19 02:29:27,460 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 02:29:27,462 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-19 02:29:27,463 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:27,463 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 44 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:29:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 02:29:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-03-19 02:29:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-03-19 02:29:27,483 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2022-03-19 02:29:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:27,484 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-03-19 02:29:27,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-03-19 02:29:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 02:29:27,484 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:27,484 INFO L500 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:29:27,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-19 02:29:27,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:27,694 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 109 times [2022-03-19 02:29:27,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345833803] [2022-03-19 02:29:27,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:27,696 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:27,696 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 110 times [2022-03-19 02:29:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:27,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835579440] [2022-03-19 02:29:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:27,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:28,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835579440] [2022-03-19 02:29:28,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835579440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714363666] [2022-03-19 02:29:28,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:29:28,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:28,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:28,480 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:29:28,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 02:29:28,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:29:28,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:28,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 02:29:28,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:28,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:31,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714363666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:31,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:31,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-19 02:29:31,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:31,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345833803] [2022-03-19 02:29:31,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345833803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:31,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:31,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-19 02:29:31,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686433479] [2022-03-19 02:29:31,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:31,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 02:29:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:31,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 02:29:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 02:29:31,381 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:32,654 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-19 02:29:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 02:29:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-03-19 02:29:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:32,657 INFO L225 Difference]: With dead ends: 132 [2022-03-19 02:29:32,657 INFO L226 Difference]: Without dead ends: 126 [2022-03-19 02:29:32,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 02:29:32,666 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:32,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 49 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:29:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-19 02:29:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-03-19 02:29:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-03-19 02:29:32,723 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2022-03-19 02:29:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:32,724 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-03-19 02:29:32,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-03-19 02:29:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 02:29:32,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:32,725 INFO L500 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:29:32,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-19 02:29:32,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:32,937 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 111 times [2022-03-19 02:29:32,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:32,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142494890] [2022-03-19 02:29:32,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:32,939 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:32,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 112 times [2022-03-19 02:29:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:32,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253575939] [2022-03-19 02:29:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:33,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253575939] [2022-03-19 02:29:33,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253575939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366761287] [2022-03-19 02:29:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:29:33,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:33,658 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:29:33,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 02:29:34,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:29:34,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 02:29:34,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:34,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:36,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366761287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:36,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:36,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-19 02:29:36,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:36,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142494890] [2022-03-19 02:29:36,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142494890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:36,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:36,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-19 02:29:36,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451393722] [2022-03-19 02:29:36,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:36,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-19 02:29:36,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-19 02:29:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 02:29:36,367 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:37,258 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-19 02:29:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 02:29:37,258 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-03-19 02:29:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:37,259 INFO L225 Difference]: With dead ends: 134 [2022-03-19 02:29:37,259 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 02:29:37,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-03-19 02:29:37,261 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:37,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 24 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:29:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 02:29:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-03-19 02:29:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-03-19 02:29:37,283 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2022-03-19 02:29:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:37,283 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-03-19 02:29:37,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:29:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-03-19 02:29:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-19 02:29:37,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:37,284 INFO L500 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:29:37,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 02:29:37,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:37,502 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 113 times [2022-03-19 02:29:37,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:37,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944184433] [2022-03-19 02:29:37,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:37,503 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:37,504 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 114 times [2022-03-19 02:29:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:37,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105982111] [2022-03-19 02:29:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:37,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:38,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:29:38,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105982111] [2022-03-19 02:29:38,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105982111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088061751] [2022-03-19 02:29:38,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:29:38,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:38,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:38,697 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:29:38,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 02:31:12,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-19 02:31:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 02:31:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:12,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:15,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088061751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:15,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-19 02:31:15,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:15,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944184433] [2022-03-19 02:31:15,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944184433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:15,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-19 02:31:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907006304] [2022-03-19 02:31:15,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:15,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 02:31:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 02:31:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 02:31:15,637 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:16,782 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-19 02:31:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 02:31:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-03-19 02:31:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:16,783 INFO L225 Difference]: With dead ends: 136 [2022-03-19 02:31:16,783 INFO L226 Difference]: Without dead ends: 130 [2022-03-19 02:31:16,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-19 02:31:16,787 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:31:16,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:31:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-19 02:31:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-03-19 02:31:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-03-19 02:31:16,820 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2022-03-19 02:31:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:16,820 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-03-19 02:31:16,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-03-19 02:31:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 02:31:16,821 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:16,821 INFO L500 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:31:16,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-19 02:31:17,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 02:31:17,026 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 115 times [2022-03-19 02:31:17,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:17,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244436790] [2022-03-19 02:31:17,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:17,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:17,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 116 times [2022-03-19 02:31:17,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:17,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211737894] [2022-03-19 02:31:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:17,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:17,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211737894] [2022-03-19 02:31:17,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211737894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810258597] [2022-03-19 02:31:17,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:31:17,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:17,979 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:31:17,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 02:31:18,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:31:18,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 02:31:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:18,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:21,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810258597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:21,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:21,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-19 02:31:21,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:21,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244436790] [2022-03-19 02:31:21,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244436790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:21,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:21,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-19 02:31:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877189739] [2022-03-19 02:31:21,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:21,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 02:31:21,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 02:31:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 02:31:21,022 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:21,993 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-19 02:31:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 02:31:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-03-19 02:31:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:21,993 INFO L225 Difference]: With dead ends: 138 [2022-03-19 02:31:21,993 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 02:31:21,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-19 02:31:21,996 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:31:21,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 39 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:31:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 02:31:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-03-19 02:31:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-03-19 02:31:22,019 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2022-03-19 02:31:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:22,019 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-03-19 02:31:22,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-03-19 02:31:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-19 02:31:22,020 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:22,020 INFO L500 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:31:22,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 02:31:22,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-19 02:31:22,239 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 117 times [2022-03-19 02:31:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:22,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341474347] [2022-03-19 02:31:22,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:22,241 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:22,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 118 times [2022-03-19 02:31:22,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:22,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304796701] [2022-03-19 02:31:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:22,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:23,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:23,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304796701] [2022-03-19 02:31:23,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304796701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492277536] [2022-03-19 02:31:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:31:23,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:23,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:23,441 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:31:23,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 02:31:23,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:31:23,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:23,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 02:31:23,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:24,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:27,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492277536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:27,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:27,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-19 02:31:27,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:27,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341474347] [2022-03-19 02:31:27,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341474347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:27,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:27,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-19 02:31:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151165907] [2022-03-19 02:31:27,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:27,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 02:31:27,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 02:31:27,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 02:31:27,063 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:28,420 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-19 02:31:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 02:31:28,421 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-03-19 02:31:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:28,421 INFO L225 Difference]: With dead ends: 140 [2022-03-19 02:31:28,421 INFO L226 Difference]: Without dead ends: 134 [2022-03-19 02:31:28,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-03-19 02:31:28,423 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:31:28,423 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 39 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:31:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-19 02:31:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-03-19 02:31:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-03-19 02:31:28,447 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2022-03-19 02:31:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:28,447 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-03-19 02:31:28,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:31:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-03-19 02:31:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 02:31:28,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:28,448 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:31:28,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 02:31:28,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:28,667 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 119 times [2022-03-19 02:31:28,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:28,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1867999382] [2022-03-19 02:31:28,668 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:28,668 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:28,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 120 times [2022-03-19 02:31:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:28,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124457352] [2022-03-19 02:31:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:28,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:29,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:31:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124457352] [2022-03-19 02:31:29,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124457352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524834472] [2022-03-19 02:31:29,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:31:29,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:29,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:29,456 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:31:29,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 02:33:34,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-19 02:33:34,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:33:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 02:33:34,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:33:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:34,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:33:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:37,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524834472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:33:37,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:33:37,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-19 02:33:37,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:33:37,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1867999382] [2022-03-19 02:33:37,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1867999382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:33:37,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:33:37,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-19 02:33:37,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982320787] [2022-03-19 02:33:37,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:33:37,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-19 02:33:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-19 02:33:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-19 02:33:37,679 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:33:38,663 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-19 02:33:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 02:33:38,663 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-03-19 02:33:38,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:33:38,664 INFO L225 Difference]: With dead ends: 142 [2022-03-19 02:33:38,664 INFO L226 Difference]: Without dead ends: 136 [2022-03-19 02:33:38,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-19 02:33:38,665 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:33:38,665 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 29 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:33:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-19 02:33:38,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-03-19 02:33:38,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-03-19 02:33:38,689 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2022-03-19 02:33:38,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:33:38,690 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-03-19 02:33:38,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:38,690 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-03-19 02:33:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-19 02:33:38,690 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:33:38,690 INFO L500 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:33:38,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-19 02:33:38,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:38,896 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:33:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:33:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 121 times [2022-03-19 02:33:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:38,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043803031] [2022-03-19 02:33:38,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:33:38,907 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:33:38,907 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:33:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 122 times [2022-03-19 02:33:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:33:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193528873] [2022-03-19 02:33:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:33:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:33:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:39,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:33:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:39,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:33:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193528873] [2022-03-19 02:33:39,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193528873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:33:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797537169] [2022-03-19 02:33:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:33:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:33:39,771 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:33:39,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 02:33:40,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:33:40,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:33:40,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 02:33:40,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:33:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:40,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:33:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:42,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797537169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:33:42,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:33:42,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-19 02:33:42,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:33:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043803031] [2022-03-19 02:33:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043803031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:33:42,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:33:42,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-19 02:33:42,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886950457] [2022-03-19 02:33:42,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:33:42,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 02:33:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 02:33:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 02:33:42,304 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:33:43,309 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-19 02:33:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 02:33:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-03-19 02:33:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:33:43,309 INFO L225 Difference]: With dead ends: 144 [2022-03-19 02:33:43,310 INFO L226 Difference]: Without dead ends: 138 [2022-03-19 02:33:43,313 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-19 02:33:43,313 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:33:43,313 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 34 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:33:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-19 02:33:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-03-19 02:33:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-03-19 02:33:43,348 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2022-03-19 02:33:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:33:43,348 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-03-19 02:33:43,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-03-19 02:33:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-19 02:33:43,349 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:33:43,349 INFO L500 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:33:43,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-19 02:33:43,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:43,550 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:33:43,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:33:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 123 times [2022-03-19 02:33:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:43,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [695306605] [2022-03-19 02:33:43,551 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:33:43,551 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:33:43,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:33:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 124 times [2022-03-19 02:33:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:33:43,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841711159] [2022-03-19 02:33:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:33:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:33:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:44,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:33:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:44,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:33:44,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841711159] [2022-03-19 02:33:44,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841711159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:33:44,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234649296] [2022-03-19 02:33:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:33:44,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:44,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:33:44,736 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:33:44,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 02:33:45,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:33:45,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:33:45,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 02:33:45,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:33:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:45,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:33:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:47,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234649296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:33:47,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:33:47,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-19 02:33:47,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:33:47,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [695306605] [2022-03-19 02:33:47,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [695306605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:33:47,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:33:47,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-19 02:33:47,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261387116] [2022-03-19 02:33:47,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:33:47,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 02:33:47,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:47,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 02:33:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-03-19 02:33:47,607 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:33:48,630 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-19 02:33:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 02:33:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-03-19 02:33:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:33:48,632 INFO L225 Difference]: With dead ends: 146 [2022-03-19 02:33:48,632 INFO L226 Difference]: Without dead ends: 140 [2022-03-19 02:33:48,635 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-03-19 02:33:48,636 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:33:48,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 29 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:33:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-19 02:33:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-03-19 02:33:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-03-19 02:33:48,673 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2022-03-19 02:33:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:33:48,673 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-03-19 02:33:48,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:33:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-03-19 02:33:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 02:33:48,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:33:48,674 INFO L500 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:33:48,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-19 02:33:48,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:48,884 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:33:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:33:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 125 times [2022-03-19 02:33:48,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:48,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969303347] [2022-03-19 02:33:48,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:33:48,886 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:33:48,886 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:33:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 126 times [2022-03-19 02:33:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:33:48,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462963712] [2022-03-19 02:33:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:33:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:33:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:50,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:33:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:33:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:33:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462963712] [2022-03-19 02:33:50,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462963712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:33:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733569758] [2022-03-19 02:33:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:33:50,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:33:50,129 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:33:50,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 02:37:22,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-19 02:37:22,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 02:37:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:23,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:25,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733569758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:25,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:25,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-19 02:37:25,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969303347] [2022-03-19 02:37:25,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969303347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:25,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:25,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-19 02:37:25,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845930543] [2022-03-19 02:37:25,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:25,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 02:37:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 02:37:25,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 02:37:25,601 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:26,729 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-19 02:37:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 02:37:26,729 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-03-19 02:37:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:26,730 INFO L225 Difference]: With dead ends: 148 [2022-03-19 02:37:26,730 INFO L226 Difference]: Without dead ends: 142 [2022-03-19 02:37:26,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-19 02:37:26,733 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:26,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 49 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-19 02:37:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-03-19 02:37:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-03-19 02:37:26,760 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2022-03-19 02:37:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:26,760 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-03-19 02:37:26,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-03-19 02:37:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-19 02:37:26,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:26,761 INFO L500 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:26,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-19 02:37:26,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-19 02:37:26,987 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 127 times [2022-03-19 02:37:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064808944] [2022-03-19 02:37:26,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:37:26,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:37:26,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 128 times [2022-03-19 02:37:26,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821923398] [2022-03-19 02:37:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821923398] [2022-03-19 02:37:27,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821923398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737968940] [2022-03-19 02:37:27,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:37:27,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:27,852 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:37:27,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 02:37:28,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:37:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 02:37:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:28,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737968940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:31,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:31,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-19 02:37:31,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:31,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064808944] [2022-03-19 02:37:31,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064808944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:31,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-19 02:37:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369405695] [2022-03-19 02:37:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:31,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 02:37:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 02:37:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 02:37:31,346 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:32,890 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-19 02:37:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 02:37:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-03-19 02:37:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:32,891 INFO L225 Difference]: With dead ends: 150 [2022-03-19 02:37:32,891 INFO L226 Difference]: Without dead ends: 144 [2022-03-19 02:37:32,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-19 02:37:32,895 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:32,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 44 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-19 02:37:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-03-19 02:37:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-03-19 02:37:32,922 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2022-03-19 02:37:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:32,922 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-03-19 02:37:32,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-03-19 02:37:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-19 02:37:32,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:32,923 INFO L500 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:32,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 02:37:33,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:33,150 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 129 times [2022-03-19 02:37:33,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:33,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111600410] [2022-03-19 02:37:33,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:37:33,152 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:37:33,152 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 130 times [2022-03-19 02:37:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573831316] [2022-03-19 02:37:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:33,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:34,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:34,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573831316] [2022-03-19 02:37:34,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573831316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685080345] [2022-03-19 02:37:34,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:37:34,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:34,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:34,119 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:37:34,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 02:37:34,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:37:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 02:37:34,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:34,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:38,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685080345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:38,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:38,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-19 02:37:38,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111600410] [2022-03-19 02:37:38,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111600410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:38,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:38,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-19 02:37:38,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124286095] [2022-03-19 02:37:38,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:38,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 02:37:38,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 02:37:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 02:37:38,610 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:40,394 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-19 02:37:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 02:37:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-03-19 02:37:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:40,395 INFO L225 Difference]: With dead ends: 152 [2022-03-19 02:37:40,395 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 02:37:40,397 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-03-19 02:37:40,397 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:40,397 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 44 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 02:37:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-03-19 02:37:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-03-19 02:37:40,442 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2022-03-19 02:37:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:40,442 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-03-19 02:37:40,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:37:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-03-19 02:37:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-19 02:37:40,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:40,443 INFO L500 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:40,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-19 02:37:40,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-19 02:37:40,660 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 131 times [2022-03-19 02:37:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293347084] [2022-03-19 02:37:40,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:37:40,661 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:37:40,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:40,661 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 132 times [2022-03-19 02:37:40,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:40,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708390130] [2022-03-19 02:37:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:40,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:41,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:41,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708390130] [2022-03-19 02:37:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708390130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473501630] [2022-03-19 02:37:41,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:37:41,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:41,554 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:37:41,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process