/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 02:19:57,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:19:57,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:19:57,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 02:19:57,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 02:19:57,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 02:19:57,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 02:19:57,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 02:19:57,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 02:19:57,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 02:19:57,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 02:19:57,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 02:19:57,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 02:19:57,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 02:19:57,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 02:19:57,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 02:19:57,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 02:19:57,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 02:19:57,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 02:19:57,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 02:19:57,676 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 02:19:57,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 02:19:57,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 02:19:57,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 02:19:57,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 02:19:57,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 02:19:57,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 02:19:57,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 02:19:57,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 02:19:57,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 02:19:57,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 02:19:57,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 02:19:57,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 02:19:57,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 02:19:57,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 02:19:57,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 02:19:57,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 02:19:57,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 02:19:57,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 02:19:57,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 02:19:57,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 02:19:57,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 02:19:57,686 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 02:19:57,692 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:19:57,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:19:57,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:19:57,694 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:19:57,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:19:57,695 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:19:57,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:19:57,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:19:57,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:19:57,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:19:57,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:19:57,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:19:57,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:19:57,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:19:57,696 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:19:57,696 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:19:57,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:19:57,696 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:19:57,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:19:57,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:19:57,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:19:57,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:19:57,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:19:57,901 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:19:57,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2022-03-19 02:19:57,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d173e08c4/a43102033bb846719d0e7f3da1465a26/FLAG1222b9c82 [2022-03-19 02:19:58,297 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:19:58,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2022-03-19 02:19:58,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d173e08c4/a43102033bb846719d0e7f3da1465a26/FLAG1222b9c82 [2022-03-19 02:19:58,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d173e08c4/a43102033bb846719d0e7f3da1465a26 [2022-03-19 02:19:58,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:19:58,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:19:58,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:19:58,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:19:58,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:19:58,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651c1860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58, skipping insertion in model container [2022-03-19 02:19:58,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:19:58,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:19:58,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c[323,336] [2022-03-19 02:19:58,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:19:58,532 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:19:58,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c[323,336] [2022-03-19 02:19:58,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:19:58,576 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:19:58,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58 WrapperNode [2022-03-19 02:19:58,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:19:58,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:19:58,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:19:58,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:19:58,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:19:58,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:19:58,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:19:58,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:19:58,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (1/1) ... [2022-03-19 02:19:58,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:19:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:19:58,654 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 02:19:58,671 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 02:19:58,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:19:58,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:19:58,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:19:58,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:19:58,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:19:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:19:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:19:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:19:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:19:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:19:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:19:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 02:19:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:19:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:19:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:19:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:19:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:19:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:19:58,758 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:19:58,760 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:19:58,967 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:19:58,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:19:58,970 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-19 02:19:58,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:19:58 BoogieIcfgContainer [2022-03-19 02:19:58,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:19:58,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:19:58,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:19:58,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:19:58,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:19:58" (1/3) ... [2022-03-19 02:19:58,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1521caa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:19:58, skipping insertion in model container [2022-03-19 02:19:58,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:19:58" (2/3) ... [2022-03-19 02:19:58,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1521caa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:19:58, skipping insertion in model container [2022-03-19 02:19:58,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:19:58" (3/3) ... [2022-03-19 02:19:58,982 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2022-03-19 02:19:58,987 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:19:58,988 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:19:59,014 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:19:59,020 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 02:19:59,020 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:19:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:19:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 02:19:59,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:19:59,034 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:19:59,034 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:19:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:19:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 1 times [2022-03-19 02:19:59,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [802851380] [2022-03-19 02:19:59,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:19:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 2 times [2022-03-19 02:19:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:19:59,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196004346] [2022-03-19 02:19:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:19:59,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:19:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:19:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,260 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 02:19:59,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:19:59,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196004346] [2022-03-19 02:19:59,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196004346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:19:59,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:19:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [802851380] [2022-03-19 02:19:59,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [802851380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:19:59,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032899600] [2022-03-19 02:19:59,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:19:59,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 02:19:59,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 02:19:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:19:59,292 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:19:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:19:59,334 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2022-03-19 02:19:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 02:19:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 02:19:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:19:59,343 INFO L225 Difference]: With dead ends: 61 [2022-03-19 02:19:59,343 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 02:19:59,346 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 02:19:59,349 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:19:59,351 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:19:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 02:19:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 02:19:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:19:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-03-19 02:19:59,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2022-03-19 02:19:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:19:59,386 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-03-19 02:19:59,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:19:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-03-19 02:19:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 02:19:59,388 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:19:59,388 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:19:59,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:19:59,389 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:19:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:19:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 1 times [2022-03-19 02:19:59,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [766101044] [2022-03-19 02:19:59,394 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:19:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 2 times [2022-03-19 02:19:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:19:59,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702928382] [2022-03-19 02:19:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:19:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:19:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:19:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,533 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 02:19:59,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:19:59,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702928382] [2022-03-19 02:19:59,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702928382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:19:59,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:19:59,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [766101044] [2022-03-19 02:19:59,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [766101044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:19:59,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977007391] [2022-03-19 02:19:59,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:19:59,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:19:59,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:19:59,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 02:19:59,541 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:19:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:19:59,603 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-19 02:19:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:19:59,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 02:19:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:19:59,604 INFO L225 Difference]: With dead ends: 54 [2022-03-19 02:19:59,604 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 02:19:59,605 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 02:19:59,606 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:19:59,606 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:19:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 02:19:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-03-19 02:19:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:19:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-03-19 02:19:59,612 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-03-19 02:19:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:19:59,613 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-03-19 02:19:59,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:19:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-03-19 02:19:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 02:19:59,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:19:59,615 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:19:59,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 02:19:59,615 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:19:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:19:59,615 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 1 times [2022-03-19 02:19:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159235643] [2022-03-19 02:19:59,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:19:59,627 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:19:59,627 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:19:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 2 times [2022-03-19 02:19:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:19:59,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826609533] [2022-03-19 02:19:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:19:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:19:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:19:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:19:59,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:19:59,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826609533] [2022-03-19 02:19:59,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826609533] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:19:59,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:19:59,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159235643] [2022-03-19 02:19:59,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159235643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:19:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493133900] [2022-03-19 02:19:59,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:19:59,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:19:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:19:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 02:19:59,731 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:19:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:19:59,861 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-03-19 02:19:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:19:59,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 02:19:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:19:59,865 INFO L225 Difference]: With dead ends: 61 [2022-03-19 02:19:59,865 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 02:19:59,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:19:59,868 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:19:59,869 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:19:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 02:19:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-03-19 02:19:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:19:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-19 02:19:59,886 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2022-03-19 02:19:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:19:59,886 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-19 02:19:59,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:19:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-19 02:19:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 02:19:59,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:19:59,889 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:19:59,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 02:19:59,891 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:19:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:19:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 1 times [2022-03-19 02:19:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675374081] [2022-03-19 02:19:59,896 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:19:59,896 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:19:59,896 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:19:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 2 times [2022-03-19 02:19:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:19:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052516634] [2022-03-19 02:19:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:19:59,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:19:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:19:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:19:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:19:59,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:19:59,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052516634] [2022-03-19 02:19:59,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052516634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:19:59,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:19:59,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675374081] [2022-03-19 02:19:59,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675374081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:19:59,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:19:59,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:19:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417439411] [2022-03-19 02:19:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:19:59,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:19:59,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:19:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:19:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 02:19:59,969 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:00,037 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-03-19 02:20:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:20:00,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 02:20:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:00,038 INFO L225 Difference]: With dead ends: 55 [2022-03-19 02:20:00,039 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 02:20:00,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:20:00,040 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:00,041 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 02:20:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-19 02:20:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-03-19 02:20:00,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-03-19 02:20:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:00,054 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-03-19 02:20:00,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-03-19 02:20:00,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 02:20:00,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:00,057 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:00,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 02:20:00,057 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:00,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:00,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 1 times [2022-03-19 02:20:00,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:00,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1814772915] [2022-03-19 02:20:00,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:00,058 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:00,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:00,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 2 times [2022-03-19 02:20:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290942842] [2022-03-19 02:20:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:00,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:00,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:00,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:00,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290942842] [2022-03-19 02:20:00,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290942842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:00,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:00,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:20:00,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:00,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1814772915] [2022-03-19 02:20:00,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1814772915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:00,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:00,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:20:00,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009652093] [2022-03-19 02:20:00,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:00,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:20:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:00,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:20:00,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 02:20:00,113 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:00,184 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-03-19 02:20:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:20:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 02:20:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:00,185 INFO L225 Difference]: With dead ends: 58 [2022-03-19 02:20:00,185 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 02:20:00,185 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:20:00,186 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:00,186 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 02:20:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2022-03-19 02:20:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-19 02:20:00,196 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2022-03-19 02:20:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:00,196 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-19 02:20:00,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-19 02:20:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 02:20:00,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:00,196 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:00,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 02:20:00,197 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:00,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 1 times [2022-03-19 02:20:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:00,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076085295] [2022-03-19 02:20:00,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:00,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:00,198 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 2 times [2022-03-19 02:20:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:00,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416938474] [2022-03-19 02:20:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:00,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:00,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:00,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416938474] [2022-03-19 02:20:00,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416938474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:00,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322506158] [2022-03-19 02:20:00,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:00,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:00,266 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 02:20:00,267 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 02:20:00,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:00,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:00,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:00,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:00,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322506158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:00,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:00,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-19 02:20:00,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076085295] [2022-03-19 02:20:00,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076085295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:00,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:00,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:20:00,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438028049] [2022-03-19 02:20:00,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:00,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:20:00,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:20:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-19 02:20:00,543 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:00,621 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-03-19 02:20:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:20:00,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 02:20:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:00,622 INFO L225 Difference]: With dead ends: 63 [2022-03-19 02:20:00,622 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 02:20:00,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:20:00,622 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:00,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 02:20:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-03-19 02:20:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-03-19 02:20:00,627 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2022-03-19 02:20:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:00,628 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-03-19 02:20:00,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-03-19 02:20:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 02:20:00,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:00,628 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:00,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:00,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-19 02:20:00,829 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:00,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1490218863, now seen corresponding path program 3 times [2022-03-19 02:20:00,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:00,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729970540] [2022-03-19 02:20:00,832 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:00,832 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:00,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:00,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1490218863, now seen corresponding path program 4 times [2022-03-19 02:20:00,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:00,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451058816] [2022-03-19 02:20:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:00,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:00,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:00,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451058816] [2022-03-19 02:20:00,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451058816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:00,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510772400] [2022-03-19 02:20:00,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:00,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:00,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:00,889 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 02:20:00,890 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 02:20:00,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:00,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:00,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 02:20:00,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:00,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:20:00,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510772400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:00,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:20:00,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-19 02:20:00,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:00,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1729970540] [2022-03-19 02:20:00,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1729970540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:00,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:00,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:20:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89890667] [2022-03-19 02:20:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:00,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:20:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:20:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:20:00,999 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:01,026 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-03-19 02:20:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:20:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 02:20:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:01,027 INFO L225 Difference]: With dead ends: 65 [2022-03-19 02:20:01,027 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 02:20:01,027 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:20:01,028 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:01,028 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 02:20:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-19 02:20:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-03-19 02:20:01,038 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2022-03-19 02:20:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:01,039 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-03-19 02:20:01,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-03-19 02:20:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 02:20:01,040 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:01,041 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:01,072 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 02:20:01,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-03-19 02:20:01,275 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:01,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1271364145, now seen corresponding path program 1 times [2022-03-19 02:20:01,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:01,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119331132] [2022-03-19 02:20:01,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:01,278 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:01,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1271364145, now seen corresponding path program 2 times [2022-03-19 02:20:01,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:01,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896811976] [2022-03-19 02:20:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:01,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:01,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:01,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:01,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896811976] [2022-03-19 02:20:01,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896811976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:01,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493195943] [2022-03-19 02:20:01,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:01,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:01,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:01,372 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 02:20:01,373 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 02:20:01,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 02:20:01,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:01,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:01,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493195943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:01,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:01,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-19 02:20:01,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:01,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119331132] [2022-03-19 02:20:01,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119331132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:01,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:01,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:01,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814132722] [2022-03-19 02:20:01,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:01,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:20:01,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:20:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:20:01,594 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:01,683 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-03-19 02:20:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:20:01,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 02:20:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:01,684 INFO L225 Difference]: With dead ends: 66 [2022-03-19 02:20:01,684 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 02:20:01,684 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2022-03-19 02:20:01,685 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:01,685 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 02:20:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-19 02:20:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-19 02:20:01,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 32 [2022-03-19 02:20:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:01,690 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-19 02:20:01,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-19 02:20:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 02:20:01,690 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:01,691 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:01,709 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 02:20:01,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:01,891 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320561, now seen corresponding path program 3 times [2022-03-19 02:20:01,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:01,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1961070279] [2022-03-19 02:20:01,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:01,893 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:01,894 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:01,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320561, now seen corresponding path program 4 times [2022-03-19 02:20:01,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:01,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845658864] [2022-03-19 02:20:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:01,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:01,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:01,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845658864] [2022-03-19 02:20:01,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845658864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414589889] [2022-03-19 02:20:01,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:01,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:01,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:01,992 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 02:20:01,993 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 02:20:02,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:02,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:02,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 02:20:02,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 02:20:02,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414589889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:02,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:02,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-19 02:20:02,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:02,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1961070279] [2022-03-19 02:20:02,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1961070279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:02,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:02,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:20:02,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011990795] [2022-03-19 02:20:02,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:02,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:20:02,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:20:02,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:20:02,226 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:02,324 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-19 02:20:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:20:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 02:20:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:02,326 INFO L225 Difference]: With dead ends: 69 [2022-03-19 02:20:02,326 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 02:20:02,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-03-19 02:20:02,327 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:02,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 48 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 02:20:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-03-19 02:20:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-03-19 02:20:02,332 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 35 [2022-03-19 02:20:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:02,332 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-03-19 02:20:02,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-03-19 02:20:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 02:20:02,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:02,333 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:02,352 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 02:20:02,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:02,547 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 385921679, now seen corresponding path program 5 times [2022-03-19 02:20:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:02,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888132719] [2022-03-19 02:20:02,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:02,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:02,550 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash 385921679, now seen corresponding path program 6 times [2022-03-19 02:20:02,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:02,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675822148] [2022-03-19 02:20:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:02,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:20:02,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:02,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675822148] [2022-03-19 02:20:02,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675822148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:02,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694145526] [2022-03-19 02:20:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:02,620 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 02:20:02,621 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 02:20:02,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:02,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 02:20:02,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 02:20:02,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694145526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:02,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:02,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-19 02:20:02,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:02,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888132719] [2022-03-19 02:20:02,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888132719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:02,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:02,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:20:02,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136904720] [2022-03-19 02:20:02,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:02,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:20:02,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:20:02,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:20:02,875 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:02,973 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-03-19 02:20:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:20:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 02:20:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:02,974 INFO L225 Difference]: With dead ends: 72 [2022-03-19 02:20:02,974 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 02:20:02,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2022-03-19 02:20:02,975 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:02,975 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 02:20:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-03-19 02:20:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-03-19 02:20:02,982 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 38 [2022-03-19 02:20:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:02,982 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-03-19 02:20:02,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-03-19 02:20:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 02:20:02,983 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:02,983 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:03,002 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 02:20:03,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 02:20:03,200 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1361731471, now seen corresponding path program 7 times [2022-03-19 02:20:03,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:03,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [460177441] [2022-03-19 02:20:03,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:03,202 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:03,202 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1361731471, now seen corresponding path program 8 times [2022-03-19 02:20:03,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258835134] [2022-03-19 02:20:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:03,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:03,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:03,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258835134] [2022-03-19 02:20:03,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258835134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:03,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271514886] [2022-03-19 02:20:03,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:03,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:03,253 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 02:20:03,254 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 02:20:03,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 02:20:03,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 02:20:03,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271514886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:03,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:03,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-19 02:20:03,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:03,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [460177441] [2022-03-19 02:20:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [460177441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:03,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:03,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:03,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133482222] [2022-03-19 02:20:03,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:03,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:20:03,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:20:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-19 02:20:03,482 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:03,558 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-03-19 02:20:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:20:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 02:20:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:03,559 INFO L225 Difference]: With dead ends: 73 [2022-03-19 02:20:03,559 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 02:20:03,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:20:03,560 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:03,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 45 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 02:20:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-03-19 02:20:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-03-19 02:20:03,566 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 41 [2022-03-19 02:20:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:03,566 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-03-19 02:20:03,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-03-19 02:20:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 02:20:03,567 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:03,567 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:03,586 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 02:20:03,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:03,779 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1307195270, now seen corresponding path program 9 times [2022-03-19 02:20:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [40212597] [2022-03-19 02:20:03,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:03,782 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:03,782 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1307195270, now seen corresponding path program 10 times [2022-03-19 02:20:03,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:03,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38433920] [2022-03-19 02:20:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:03,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:03,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:03,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:03,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38433920] [2022-03-19 02:20:03,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38433920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:03,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29992756] [2022-03-19 02:20:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:03,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:03,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:03,840 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 02:20:03,841 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 02:20:03,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:03,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:03,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 02:20:03,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:04,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29992756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:04,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:04,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-19 02:20:04,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [40212597] [2022-03-19 02:20:04,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [40212597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:04,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:04,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:20:04,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874040076] [2022-03-19 02:20:04,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:04,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:20:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:20:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:20:04,072 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:04,159 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-19 02:20:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:20:04,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-19 02:20:04,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:04,160 INFO L225 Difference]: With dead ends: 79 [2022-03-19 02:20:04,160 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 02:20:04,161 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:20:04,161 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:04,161 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 45 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 02:20:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-19 02:20:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-19 02:20:04,167 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 44 [2022-03-19 02:20:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:04,167 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-19 02:20:04,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-19 02:20:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 02:20:04,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:04,168 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:04,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 02:20:04,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:04,384 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -116869167, now seen corresponding path program 11 times [2022-03-19 02:20:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943591214] [2022-03-19 02:20:04,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:04,386 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:04,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -116869167, now seen corresponding path program 12 times [2022-03-19 02:20:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:04,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869023764] [2022-03-19 02:20:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:04,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:04,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869023764] [2022-03-19 02:20:04,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869023764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753571917] [2022-03-19 02:20:04,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:04,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:04,459 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 02:20:04,460 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 02:20:04,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:04,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:04,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:04,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 02:20:04,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 02:20:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753571917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:04,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:04,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-19 02:20:04,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:04,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943591214] [2022-03-19 02:20:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943591214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:04,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:04,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:20:04,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737705792] [2022-03-19 02:20:04,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:04,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:20:04,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:20:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:20:04,735 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:04,833 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-19 02:20:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:20:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 02:20:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:04,834 INFO L225 Difference]: With dead ends: 85 [2022-03-19 02:20:04,834 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 02:20:04,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-19 02:20:04,835 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:04,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 02:20:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-03-19 02:20:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-03-19 02:20:04,842 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 47 [2022-03-19 02:20:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:04,842 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-03-19 02:20:04,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-03-19 02:20:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 02:20:04,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:04,843 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:04,860 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 02:20:05,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 02:20:05,057 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:05,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1638069530, now seen corresponding path program 13 times [2022-03-19 02:20:05,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:05,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846588720] [2022-03-19 02:20:05,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:05,059 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:05,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1638069530, now seen corresponding path program 14 times [2022-03-19 02:20:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:05,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597925775] [2022-03-19 02:20:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:05,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597925775] [2022-03-19 02:20:05,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597925775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473210586] [2022-03-19 02:20:05,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:05,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:05,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:05,157 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 02:20:05,158 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 02:20:05,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:05,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:05,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:05,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:05,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473210586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:05,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:05,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-19 02:20:05,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:05,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846588720] [2022-03-19 02:20:05,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846588720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:05,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:05,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:20:05,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178656785] [2022-03-19 02:20:05,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:05,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:20:05,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:05,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:20:05,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-19 02:20:05,488 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:05,616 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-19 02:20:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:20:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-19 02:20:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:05,617 INFO L225 Difference]: With dead ends: 91 [2022-03-19 02:20:05,617 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 02:20:05,618 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:20:05,618 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:05,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 50 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 02:20:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-03-19 02:20:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-03-19 02:20:05,626 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 50 [2022-03-19 02:20:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:05,626 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-03-19 02:20:05,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-03-19 02:20:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 02:20:05,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:05,627 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:05,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:05,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 02:20:05,847 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash 379897649, now seen corresponding path program 15 times [2022-03-19 02:20:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2125197197] [2022-03-19 02:20:05,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:05,850 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:05,850 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash 379897649, now seen corresponding path program 16 times [2022-03-19 02:20:05,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:05,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526931713] [2022-03-19 02:20:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:05,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:05,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526931713] [2022-03-19 02:20:05,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526931713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932249425] [2022-03-19 02:20:05,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:05,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:05,952 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 02:20:05,972 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 02:20:06,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:06,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:20:06,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:06,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:06,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932249425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:06,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:06,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-19 02:20:06,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:06,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2125197197] [2022-03-19 02:20:06,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2125197197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:06,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:06,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:20:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133486118] [2022-03-19 02:20:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:06,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:20:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:20:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:20:06,308 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:06,481 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-19 02:20:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:20:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-19 02:20:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:06,482 INFO L225 Difference]: With dead ends: 97 [2022-03-19 02:20:06,482 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 02:20:06,483 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:20:06,483 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:06,483 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 60 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 02:20:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-03-19 02:20:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-03-19 02:20:06,489 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 53 [2022-03-19 02:20:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:06,489 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-03-19 02:20:06,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-03-19 02:20:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 02:20:06,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:06,490 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:06,507 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 02:20:06,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 02:20:06,699 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:06,700 INFO L85 PathProgramCache]: Analyzing trace with hash 360982970, now seen corresponding path program 17 times [2022-03-19 02:20:06,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:06,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474890973] [2022-03-19 02:20:06,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:06,701 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:06,701 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:06,701 INFO L85 PathProgramCache]: Analyzing trace with hash 360982970, now seen corresponding path program 18 times [2022-03-19 02:20:06,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:06,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971484460] [2022-03-19 02:20:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:06,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:06,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971484460] [2022-03-19 02:20:06,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971484460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699063610] [2022-03-19 02:20:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:06,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:06,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:06,787 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 02:20:06,788 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 02:20:06,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:06,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:06,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-19 02:20:06,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-19 02:20:07,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699063610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:07,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:07,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2022-03-19 02:20:07,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474890973] [2022-03-19 02:20:07,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474890973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:07,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:07,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:20:07,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257958747] [2022-03-19 02:20:07,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:07,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:20:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:20:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-19 02:20:07,080 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:07,236 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-03-19 02:20:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:20:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-19 02:20:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:07,237 INFO L225 Difference]: With dead ends: 103 [2022-03-19 02:20:07,237 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 02:20:07,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:20:07,238 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:07,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 02:20:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 02:20:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-03-19 02:20:07,244 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 56 [2022-03-19 02:20:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:07,244 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-03-19 02:20:07,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-03-19 02:20:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 02:20:07,244 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:07,245 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:07,261 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 02:20:07,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 02:20:07,459 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash -485503343, now seen corresponding path program 19 times [2022-03-19 02:20:07,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:07,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321281117] [2022-03-19 02:20:07,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:07,460 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:07,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash -485503343, now seen corresponding path program 20 times [2022-03-19 02:20:07,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:07,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750483125] [2022-03-19 02:20:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:07,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:07,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:07,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:07,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750483125] [2022-03-19 02:20:07,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750483125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:07,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851889057] [2022-03-19 02:20:07,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:07,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:07,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:07,575 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 02:20:07,576 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 02:20:07,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:07,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:07,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 02:20:07,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:07,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:08,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851889057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:08,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:08,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-19 02:20:08,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:08,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321281117] [2022-03-19 02:20:08,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321281117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:08,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:08,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:20:08,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390128684] [2022-03-19 02:20:08,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:08,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:20:08,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:20:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=483, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:20:08,027 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:08,202 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-03-19 02:20:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:20:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-19 02:20:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:08,202 INFO L225 Difference]: With dead ends: 109 [2022-03-19 02:20:08,202 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 02:20:08,203 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=518, Invalid=888, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 02:20:08,203 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 125 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:08,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 45 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 02:20:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-03-19 02:20:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-03-19 02:20:08,210 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2022-03-19 02:20:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:08,210 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-03-19 02:20:08,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-03-19 02:20:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 02:20:08,210 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:08,210 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:08,226 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 02:20:08,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 02:20:08,411 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1888708186, now seen corresponding path program 21 times [2022-03-19 02:20:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119426109] [2022-03-19 02:20:08,413 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:08,413 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:08,413 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1888708186, now seen corresponding path program 22 times [2022-03-19 02:20:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:08,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82708019] [2022-03-19 02:20:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:08,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:08,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82708019] [2022-03-19 02:20:08,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82708019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:08,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040660417] [2022-03-19 02:20:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:08,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:08,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:08,522 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 02:20:08,523 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 02:20:08,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:08,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 02:20:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 71 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:08,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 71 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:08,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040660417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:08,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:08,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-19 02:20:08,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:08,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119426109] [2022-03-19 02:20:08,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119426109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:08,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:08,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:20:08,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069091795] [2022-03-19 02:20:08,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:08,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:20:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:20:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 02:20:08,955 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:09,182 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-19 02:20:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:20:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-19 02:20:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:09,183 INFO L225 Difference]: With dead ends: 115 [2022-03-19 02:20:09,183 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 02:20:09,183 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:20:09,184 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 137 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:09,184 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 50 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 02:20:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-03-19 02:20:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.234375) internal successors, (79), 64 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-03-19 02:20:09,191 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 62 [2022-03-19 02:20:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:09,191 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-03-19 02:20:09,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-03-19 02:20:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 02:20:09,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:09,191 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:09,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:09,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 02:20:09,407 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1792029199, now seen corresponding path program 23 times [2022-03-19 02:20:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:09,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1218409890] [2022-03-19 02:20:09,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:09,409 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:09,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1792029199, now seen corresponding path program 24 times [2022-03-19 02:20:09,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448890497] [2022-03-19 02:20:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:09,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:09,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:09,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448890497] [2022-03-19 02:20:09,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448890497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:09,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032263955] [2022-03-19 02:20:09,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:09,550 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 02:20:09,551 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 02:20:09,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:09,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:09,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-19 02:20:09,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-19 02:20:09,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032263955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:09,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:09,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-03-19 02:20:09,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1218409890] [2022-03-19 02:20:09,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1218409890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:09,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:09,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:20:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712468391] [2022-03-19 02:20:09,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:09,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:20:09,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:20:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-19 02:20:09,916 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:10,139 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2022-03-19 02:20:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:20:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-19 02:20:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:10,140 INFO L225 Difference]: With dead ends: 121 [2022-03-19 02:20:10,140 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 02:20:10,141 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:20:10,141 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:10,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 55 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 02:20:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-03-19 02:20:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 67 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-19 02:20:10,149 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2022-03-19 02:20:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:10,150 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-19 02:20:10,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-19 02:20:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 02:20:10,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:10,150 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:10,167 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 02:20:10,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:10,351 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash 170568442, now seen corresponding path program 25 times [2022-03-19 02:20:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:10,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449464886] [2022-03-19 02:20:10,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:10,352 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:10,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 170568442, now seen corresponding path program 26 times [2022-03-19 02:20:10,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278108196] [2022-03-19 02:20:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:10,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:10,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:10,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278108196] [2022-03-19 02:20:10,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278108196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601410896] [2022-03-19 02:20:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:10,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:10,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:10,473 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 02:20:10,474 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 02:20:10,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:10,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:10,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 02:20:10,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:10,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:11,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601410896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:11,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:11,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-03-19 02:20:11,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449464886] [2022-03-19 02:20:11,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449464886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:11,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:11,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:20:11,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363242669] [2022-03-19 02:20:11,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:11,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:20:11,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:20:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=746, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 02:20:11,055 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:11,288 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2022-03-19 02:20:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:20:11,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 02:20:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:11,289 INFO L225 Difference]: With dead ends: 127 [2022-03-19 02:20:11,289 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 02:20:11,290 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=816, Invalid=1440, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 02:20:11,292 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:11,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 45 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:11,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 02:20:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-19 02:20:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-03-19 02:20:11,318 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 68 [2022-03-19 02:20:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:11,318 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-03-19 02:20:11,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-03-19 02:20:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 02:20:11,319 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:11,319 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:11,336 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 02:20:11,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:11,519 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 527091025, now seen corresponding path program 27 times [2022-03-19 02:20:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:11,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2004537325] [2022-03-19 02:20:11,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:11,521 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:11,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:11,521 INFO L85 PathProgramCache]: Analyzing trace with hash 527091025, now seen corresponding path program 28 times [2022-03-19 02:20:11,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:11,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827365433] [2022-03-19 02:20:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:11,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:11,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827365433] [2022-03-19 02:20:11,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827365433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266767439] [2022-03-19 02:20:11,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:11,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:11,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:11,653 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 02:20:11,691 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 02:20:11,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:11,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 02:20:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 146 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:12,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 146 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:12,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266767439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:12,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:12,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-19 02:20:12,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:12,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2004537325] [2022-03-19 02:20:12,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2004537325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:12,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:12,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:20:12,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663013233] [2022-03-19 02:20:12,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:12,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:20:12,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:12,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:20:12,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1359, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 02:20:12,257 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:12,561 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2022-03-19 02:20:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:20:12,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-19 02:20:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:12,562 INFO L225 Difference]: With dead ends: 133 [2022-03-19 02:20:12,562 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 02:20:12,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=607, Invalid=2363, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 02:20:12,564 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:12,564 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 50 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 02:20:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-19 02:20:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-03-19 02:20:12,575 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 71 [2022-03-19 02:20:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:12,575 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-03-19 02:20:12,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-03-19 02:20:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 02:20:12,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:12,575 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:12,595 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 02:20:12,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:12,791 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:12,792 INFO L85 PathProgramCache]: Analyzing trace with hash 237238170, now seen corresponding path program 29 times [2022-03-19 02:20:12,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:12,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1505377689] [2022-03-19 02:20:12,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:12,793 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:12,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash 237238170, now seen corresponding path program 30 times [2022-03-19 02:20:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:12,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866698443] [2022-03-19 02:20:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:12,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:12,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:12,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866698443] [2022-03-19 02:20:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866698443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:12,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407116265] [2022-03-19 02:20:12,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:12,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:12,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:12,970 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 02:20:12,971 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 02:20:13,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-19 02:20:13,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-19 02:20:13,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407116265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:13,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:13,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-03-19 02:20:13,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:13,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1505377689] [2022-03-19 02:20:13,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1505377689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:13,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:13,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:20:13,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124084463] [2022-03-19 02:20:13,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:13,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:20:13,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:20:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:20:13,345 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:13,648 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2022-03-19 02:20:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:20:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-19 02:20:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:13,650 INFO L225 Difference]: With dead ends: 139 [2022-03-19 02:20:13,650 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 02:20:13,650 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 02:20:13,651 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:13,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 55 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 02:20:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-03-19 02:20:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2022-03-19 02:20:13,665 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 74 [2022-03-19 02:20:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:13,666 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2022-03-19 02:20:13,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2022-03-19 02:20:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 02:20:13,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:13,666 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:13,688 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 02:20:13,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:13,879 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1884900175, now seen corresponding path program 31 times [2022-03-19 02:20:13,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234086907] [2022-03-19 02:20:13,881 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:13,881 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:13,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1884900175, now seen corresponding path program 32 times [2022-03-19 02:20:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:13,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658972692] [2022-03-19 02:20:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:14,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658972692] [2022-03-19 02:20:14,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658972692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:14,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615470913] [2022-03-19 02:20:14,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:14,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:14,036 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 02:20:14,037 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 02:20:14,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:14,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:20:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:14,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:14,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615470913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:14,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:14,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-03-19 02:20:14,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:14,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234086907] [2022-03-19 02:20:14,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234086907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:14,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:14,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 02:20:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588132386] [2022-03-19 02:20:14,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:14,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 02:20:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:14,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 02:20:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=893, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 02:20:14,688 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:15,017 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2022-03-19 02:20:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 02:20:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-19 02:20:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:15,018 INFO L225 Difference]: With dead ends: 145 [2022-03-19 02:20:15,018 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 02:20:15,019 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=972, Invalid=1890, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 02:20:15,019 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 193 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:15,020 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 02:20:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-03-19 02:20:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-03-19 02:20:15,030 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 77 [2022-03-19 02:20:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:15,030 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-03-19 02:20:15,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-03-19 02:20:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 02:20:15,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:15,031 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:15,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-19 02:20:15,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:15,235 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -589738950, now seen corresponding path program 33 times [2022-03-19 02:20:15,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:15,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262538680] [2022-03-19 02:20:15,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:15,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:15,237 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash -589738950, now seen corresponding path program 34 times [2022-03-19 02:20:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354991827] [2022-03-19 02:20:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:15,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:15,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:15,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354991827] [2022-03-19 02:20:15,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354991827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701190871] [2022-03-19 02:20:15,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:15,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:15,444 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 02:20:15,447 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 02:20:15,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:15,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:15,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:20:15,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 248 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:15,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 248 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:16,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701190871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:16,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:16,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2022-03-19 02:20:16,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:16,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [262538680] [2022-03-19 02:20:16,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [262538680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:16,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:16,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 02:20:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886233644] [2022-03-19 02:20:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:16,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 02:20:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 02:20:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1950, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 02:20:16,026 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:16,391 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2022-03-19 02:20:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:20:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-19 02:20:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:16,395 INFO L225 Difference]: With dead ends: 151 [2022-03-19 02:20:16,395 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 02:20:16,397 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=3473, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 02:20:16,397 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:16,397 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 02:20:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-19 02:20:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-03-19 02:20:16,408 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 80 [2022-03-19 02:20:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:16,409 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-03-19 02:20:16,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-03-19 02:20:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 02:20:16,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:16,409 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:16,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-19 02:20:16,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:16,614 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:16,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1867095057, now seen corresponding path program 35 times [2022-03-19 02:20:16,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:16,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243723309] [2022-03-19 02:20:16,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:16,617 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:16,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1867095057, now seen corresponding path program 36 times [2022-03-19 02:20:16,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:16,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221957433] [2022-03-19 02:20:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:16,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:16,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:16,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221957433] [2022-03-19 02:20:16,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221957433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:16,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313341302] [2022-03-19 02:20:16,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:16,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:16,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:16,828 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 02:20:16,852 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 02:20:16,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:16,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-19 02:20:17,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-19 02:20:17,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313341302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:17,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:17,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5, 5] total 26 [2022-03-19 02:20:17,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:17,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243723309] [2022-03-19 02:20:17,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243723309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:17,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:17,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:20:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029521839] [2022-03-19 02:20:17,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:17,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:20:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:20:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:20:17,349 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:17,693 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-03-19 02:20:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 02:20:17,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-19 02:20:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:17,694 INFO L225 Difference]: With dead ends: 157 [2022-03-19 02:20:17,694 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 02:20:17,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=521, Invalid=1285, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:20:17,695 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:17,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 02:20:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-03-19 02:20:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 85 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-19 02:20:17,709 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 83 [2022-03-19 02:20:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:17,709 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-19 02:20:17,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-19 02:20:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 02:20:17,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:17,710 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:17,727 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 02:20:17,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 02:20:17,910 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1423660838, now seen corresponding path program 37 times [2022-03-19 02:20:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:17,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495985152] [2022-03-19 02:20:17,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:17,912 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:17,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1423660838, now seen corresponding path program 38 times [2022-03-19 02:20:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:17,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230159965] [2022-03-19 02:20:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:18,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230159965] [2022-03-19 02:20:18,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230159965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875433791] [2022-03-19 02:20:18,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:18,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:18,089 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 02:20:18,089 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 02:20:18,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:18,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 02:20:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:18,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:18,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875433791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:18,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:18,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 42 [2022-03-19 02:20:18,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:18,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495985152] [2022-03-19 02:20:18,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495985152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:18,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:18,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 02:20:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381648813] [2022-03-19 02:20:18,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:18,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 02:20:18,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 02:20:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=1058, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 02:20:18,815 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:19,223 INFO L93 Difference]: Finished difference Result 163 states and 206 transitions. [2022-03-19 02:20:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 02:20:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-19 02:20:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:19,224 INFO L225 Difference]: With dead ends: 163 [2022-03-19 02:20:19,224 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 02:20:19,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1128, Invalid=2412, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 02:20:19,225 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 225 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:19,226 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 50 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 02:20:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-03-19 02:20:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 88 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-19 02:20:19,238 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 86 [2022-03-19 02:20:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:19,238 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-19 02:20:19,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-19 02:20:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 02:20:19,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:19,239 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:19,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 02:20:19,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 02:20:19,443 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash 590969713, now seen corresponding path program 39 times [2022-03-19 02:20:19,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:19,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689875105] [2022-03-19 02:20:19,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:19,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:19,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash 590969713, now seen corresponding path program 40 times [2022-03-19 02:20:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:19,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968516361] [2022-03-19 02:20:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:19,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:19,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968516361] [2022-03-19 02:20:19,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968516361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360000785] [2022-03-19 02:20:19,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:19,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:19,702 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 02:20:19,703 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 02:20:19,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:19,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:19,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 02:20:19,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 377 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:20,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 377 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:20,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360000785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:20,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:20,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 60 [2022-03-19 02:20:20,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:20,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689875105] [2022-03-19 02:20:20,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689875105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:20,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:20,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 02:20:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948852449] [2022-03-19 02:20:20,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:20,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 02:20:20,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:20,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 02:20:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=2691, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 02:20:20,435 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:20,915 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2022-03-19 02:20:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 02:20:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-19 02:20:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:20,916 INFO L225 Difference]: With dead ends: 169 [2022-03-19 02:20:20,916 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 02:20:20,918 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1321, Invalid=4841, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 02:20:20,918 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:20,918 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 50 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 02:20:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-03-19 02:20:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 91 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2022-03-19 02:20:20,931 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 89 [2022-03-19 02:20:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:20,932 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2022-03-19 02:20:20,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2022-03-19 02:20:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 02:20:20,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:20,932 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:20,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 02:20:21,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 02:20:21,138 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 576720250, now seen corresponding path program 41 times [2022-03-19 02:20:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:21,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806713882] [2022-03-19 02:20:21,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:21,140 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:21,140 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:21,140 INFO L85 PathProgramCache]: Analyzing trace with hash 576720250, now seen corresponding path program 42 times [2022-03-19 02:20:21,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:21,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047118731] [2022-03-19 02:20:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:21,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:21,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:21,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:21,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047118731] [2022-03-19 02:20:21,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047118731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:21,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621421211] [2022-03-19 02:20:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:21,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:21,414 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 02:20:21,415 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 02:20:21,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-19 02:20:21,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-19 02:20:21,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621421211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:21,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:21,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 29 [2022-03-19 02:20:21,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:21,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806713882] [2022-03-19 02:20:21,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806713882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:21,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:21,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 02:20:21,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498209863] [2022-03-19 02:20:21,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:21,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 02:20:21,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 02:20:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:20:21,858 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:22,336 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2022-03-19 02:20:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 02:20:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-19 02:20:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:22,338 INFO L225 Difference]: With dead ends: 175 [2022-03-19 02:20:22,338 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 02:20:22,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1556, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 02:20:22,339 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 228 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:22,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 45 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 02:20:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-19 02:20:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 94 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-03-19 02:20:22,369 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 92 [2022-03-19 02:20:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:22,369 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-03-19 02:20:22,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-03-19 02:20:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 02:20:22,369 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:22,369 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 19, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:22,389 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 02:20:22,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:22,570 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:22,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1272730321, now seen corresponding path program 43 times [2022-03-19 02:20:22,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:22,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [935010506] [2022-03-19 02:20:22,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:22,572 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:22,572 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1272730321, now seen corresponding path program 44 times [2022-03-19 02:20:22,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:22,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717711978] [2022-03-19 02:20:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:22,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:22,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717711978] [2022-03-19 02:20:22,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717711978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:22,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284913513] [2022-03-19 02:20:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:22,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:22,839 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 02:20:22,844 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 02:20:23,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:23,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 02:20:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:23,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 02:20:23,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284913513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:23,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:23,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 65 [2022-03-19 02:20:23,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:23,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [935010506] [2022-03-19 02:20:23,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [935010506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:23,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:23,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 02:20:23,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612489158] [2022-03-19 02:20:23,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:23,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 02:20:23,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 02:20:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1388, Invalid=2772, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 02:20:23,899 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:24,410 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2022-03-19 02:20:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 02:20:24,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-19 02:20:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:24,411 INFO L225 Difference]: With dead ends: 179 [2022-03-19 02:20:24,411 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 02:20:24,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2333, Invalid=4977, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 02:20:24,412 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:24,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 40 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 02:20:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 02:20:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.268041237113402) internal successors, (123), 97 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-19 02:20:24,428 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 95 [2022-03-19 02:20:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:24,428 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-19 02:20:24,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-19 02:20:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-19 02:20:24,428 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:24,428 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:24,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 02:20:24,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 02:20:24,632 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 6650394, now seen corresponding path program 45 times [2022-03-19 02:20:24,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:24,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951722652] [2022-03-19 02:20:24,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:24,633 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:24,633 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 6650394, now seen corresponding path program 46 times [2022-03-19 02:20:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:24,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355193371] [2022-03-19 02:20:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:24,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-03-19 02:20:24,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355193371] [2022-03-19 02:20:24,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355193371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969641524] [2022-03-19 02:20:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:24,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:24,699 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 02:20:24,714 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 02:20:24,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:24,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 02:20:24,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 533 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:25,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 533 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-19 02:20:25,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969641524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:25,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:25,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 25, 25] total 50 [2022-03-19 02:20:25,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:25,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951722652] [2022-03-19 02:20:25,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951722652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:25,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:25,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:25,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351114614] [2022-03-19 02:20:25,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:25,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:20:25,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:25,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:20:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=1636, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 02:20:25,530 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:25,669 INFO L93 Difference]: Finished difference Result 258 states and 330 transitions. [2022-03-19 02:20:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:20:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-19 02:20:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:25,670 INFO L225 Difference]: With dead ends: 258 [2022-03-19 02:20:25,670 INFO L226 Difference]: Without dead ends: 242 [2022-03-19 02:20:25,671 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=832, Invalid=1924, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 02:20:25,671 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:25,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 29 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-19 02:20:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 166. [2022-03-19 02:20:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.29375) internal successors, (207), 160 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2022-03-19 02:20:25,716 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 98 [2022-03-19 02:20:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:25,716 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2022-03-19 02:20:25,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2022-03-19 02:20:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 02:20:25,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:25,717 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 40, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:25,735 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 02:20:25,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:25,928 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 576417944, now seen corresponding path program 47 times [2022-03-19 02:20:25,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:25,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269215906] [2022-03-19 02:20:25,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:25,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:25,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash 576417944, now seen corresponding path program 48 times [2022-03-19 02:20:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:25,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850023944] [2022-03-19 02:20:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:26,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1245 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2022-03-19 02:20:26,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850023944] [2022-03-19 02:20:26,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850023944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354786240] [2022-03-19 02:20:26,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:26,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:26,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:26,044 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 02:20:26,045 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 02:20:26,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:26,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-03-19 02:20:26,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-03-19 02:20:26,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354786240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:26,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:26,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-19 02:20:26,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269215906] [2022-03-19 02:20:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269215906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:26,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:26,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:20:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414805583] [2022-03-19 02:20:26,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:26,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:20:26,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:20:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:20:26,759 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:26,991 INFO L93 Difference]: Finished difference Result 329 states and 424 transitions. [2022-03-19 02:20:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:20:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-19 02:20:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:26,993 INFO L225 Difference]: With dead ends: 329 [2022-03-19 02:20:26,993 INFO L226 Difference]: Without dead ends: 313 [2022-03-19 02:20:26,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-19 02:20:26,994 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:26,994 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 39 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-19 02:20:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 229. [2022-03-19 02:20:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.304932735426009) internal successors, (291), 223 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 296 transitions. [2022-03-19 02:20:27,038 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 296 transitions. Word has length 161 [2022-03-19 02:20:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:27,038 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 296 transitions. [2022-03-19 02:20:27,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 296 transitions. [2022-03-19 02:20:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-19 02:20:27,040 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:27,040 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 60, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:27,059 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 02:20:27,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 02:20:27,256 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash 54436442, now seen corresponding path program 49 times [2022-03-19 02:20:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:27,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061182108] [2022-03-19 02:20:27,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:27,258 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:27,258 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:27,258 INFO L85 PathProgramCache]: Analyzing trace with hash 54436442, now seen corresponding path program 50 times [2022-03-19 02:20:27,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:27,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028714848] [2022-03-19 02:20:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:27,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-19 02:20:27,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:27,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028714848] [2022-03-19 02:20:27,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028714848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:27,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231638580] [2022-03-19 02:20:27,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:27,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:27,432 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 02:20:27,433 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 02:20:27,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:27,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 02:20:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-19 02:20:28,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-19 02:20:28,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231638580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:28,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:28,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-19 02:20:28,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061182108] [2022-03-19 02:20:28,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061182108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:28,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:28,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:20:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667234264] [2022-03-19 02:20:28,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:28,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:20:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:20:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:20:28,701 INFO L87 Difference]: Start difference. First operand 229 states and 296 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:28,924 INFO L93 Difference]: Finished difference Result 400 states and 518 transitions. [2022-03-19 02:20:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:20:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-03-19 02:20:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:28,941 INFO L225 Difference]: With dead ends: 400 [2022-03-19 02:20:28,941 INFO L226 Difference]: Without dead ends: 384 [2022-03-19 02:20:28,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:20:28,942 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:28,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 29 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-19 02:20:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 292. [2022-03-19 02:20:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.3111888111888113) internal successors, (375), 286 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 380 transitions. [2022-03-19 02:20:29,001 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 380 transitions. Word has length 224 [2022-03-19 02:20:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:29,001 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 380 transitions. [2022-03-19 02:20:29,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 380 transitions. [2022-03-19 02:20:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-03-19 02:20:29,003 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:29,003 INFO L500 BasicCegarLoop]: trace histogram [80, 80, 80, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:29,022 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 02:20:29,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:29,222 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash -381796264, now seen corresponding path program 51 times [2022-03-19 02:20:29,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:29,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848741934] [2022-03-19 02:20:29,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:29,224 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:29,224 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash -381796264, now seen corresponding path program 52 times [2022-03-19 02:20:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:29,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040347894] [2022-03-19 02:20:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:29,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:29,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2396 trivial. 0 not checked. [2022-03-19 02:20:29,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:29,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040347894] [2022-03-19 02:20:29,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040347894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:29,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554375701] [2022-03-19 02:20:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:29,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:29,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:29,448 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 02:20:29,449 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 02:20:29,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:29,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 02:20:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 536 proven. 3599 refuted. 0 times theorem prover too weak. 5723 trivial. 0 not checked. [2022-03-19 02:20:30,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 536 proven. 3599 refuted. 0 times theorem prover too weak. 5723 trivial. 0 not checked. [2022-03-19 02:20:31,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554375701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:31,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:31,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25, 25] total 53 [2022-03-19 02:20:31,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:31,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848741934] [2022-03-19 02:20:31,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848741934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:31,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:31,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:20:31,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153567522] [2022-03-19 02:20:31,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:31,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:20:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:31,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:20:31,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1924, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 02:20:31,031 INFO L87 Difference]: Start difference. First operand 292 states and 380 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:31,378 INFO L93 Difference]: Finished difference Result 406 states and 525 transitions. [2022-03-19 02:20:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:20:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-03-19 02:20:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:31,380 INFO L225 Difference]: With dead ends: 406 [2022-03-19 02:20:31,380 INFO L226 Difference]: Without dead ends: 390 [2022-03-19 02:20:31,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=886, Invalid=2536, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 02:20:31,381 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 220 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:31,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-19 02:20:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 355. [2022-03-19 02:20:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.3151862464183381) internal successors, (459), 349 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 464 transitions. [2022-03-19 02:20:31,454 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 464 transitions. Word has length 287 [2022-03-19 02:20:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:31,454 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 464 transitions. [2022-03-19 02:20:31,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 464 transitions. [2022-03-19 02:20:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-03-19 02:20:31,456 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:31,456 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:31,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 02:20:31,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:31,662 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash 587258522, now seen corresponding path program 53 times [2022-03-19 02:20:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:31,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263509884] [2022-03-19 02:20:31,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:31,663 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:31,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:31,664 INFO L85 PathProgramCache]: Analyzing trace with hash 587258522, now seen corresponding path program 54 times [2022-03-19 02:20:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:31,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751982027] [2022-03-19 02:20:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:31,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:31,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:31,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751982027] [2022-03-19 02:20:31,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751982027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667063461] [2022-03-19 02:20:31,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:31,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:31,929 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 02:20:31,931 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 02:20:32,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:32,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:32,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:33,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667063461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:33,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:33,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-19 02:20:33,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:33,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263509884] [2022-03-19 02:20:33,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263509884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:33,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:33,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433157831] [2022-03-19 02:20:33,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:33,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:20:33,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:20:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:20:33,179 INFO L87 Difference]: Start difference. First operand 355 states and 464 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:33,392 INFO L93 Difference]: Finished difference Result 379 states and 491 transitions. [2022-03-19 02:20:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:20:33,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-03-19 02:20:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:33,411 INFO L225 Difference]: With dead ends: 379 [2022-03-19 02:20:33,411 INFO L226 Difference]: Without dead ends: 368 [2022-03-19 02:20:33,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-03-19 02:20:33,412 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:33,412 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-03-19 02:20:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2022-03-19 02:20:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.3125) internal successors, (462), 352 states have internal predecessors, (462), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 467 transitions. [2022-03-19 02:20:33,487 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 467 transitions. Word has length 350 [2022-03-19 02:20:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:33,488 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 467 transitions. [2022-03-19 02:20:33,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 467 transitions. [2022-03-19 02:20:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-03-19 02:20:33,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:33,489 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:33,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 02:20:33,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:33,693 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:33,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1194423610, now seen corresponding path program 55 times [2022-03-19 02:20:33,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:33,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [379822976] [2022-03-19 02:20:33,694 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:33,694 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:33,694 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1194423610, now seen corresponding path program 56 times [2022-03-19 02:20:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:33,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505091505] [2022-03-19 02:20:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:33,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:33,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:33,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505091505] [2022-03-19 02:20:33,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505091505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:33,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587118430] [2022-03-19 02:20:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:33,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:33,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:33,972 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 02:20:33,973 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 02:20:34,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 02:20:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:34,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:35,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587118430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:35,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:35,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-03-19 02:20:35,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:35,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [379822976] [2022-03-19 02:20:35,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [379822976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:35,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:35,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:20:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97704835] [2022-03-19 02:20:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:35,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:20:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:20:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:20:35,496 INFO L87 Difference]: Start difference. First operand 358 states and 467 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:35,683 INFO L93 Difference]: Finished difference Result 386 states and 499 transitions. [2022-03-19 02:20:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:20:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-03-19 02:20:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:35,684 INFO L225 Difference]: With dead ends: 386 [2022-03-19 02:20:35,684 INFO L226 Difference]: Without dead ends: 375 [2022-03-19 02:20:35,685 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:20:35,685 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:35,685 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-19 02:20:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 361. [2022-03-19 02:20:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.3098591549295775) internal successors, (465), 355 states have internal predecessors, (465), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 470 transitions. [2022-03-19 02:20:35,762 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 470 transitions. Word has length 353 [2022-03-19 02:20:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:35,762 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 470 transitions. [2022-03-19 02:20:35,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 470 transitions. [2022-03-19 02:20:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-19 02:20:35,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:35,774 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:35,795 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 02:20:35,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 02:20:35,987 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1152690534, now seen corresponding path program 57 times [2022-03-19 02:20:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:35,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584516710] [2022-03-19 02:20:35,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:35,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:35,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1152690534, now seen corresponding path program 58 times [2022-03-19 02:20:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:35,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737825999] [2022-03-19 02:20:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:35,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:36,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:36,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737825999] [2022-03-19 02:20:36,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737825999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216391389] [2022-03-19 02:20:36,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:36,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:36,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:36,265 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 02:20:36,267 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 02:20:36,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:36,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1958 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 02:20:36,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 537 proven. 4790 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-19 02:20:37,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 537 proven. 4790 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-19 02:20:38,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216391389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:38,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:38,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 27, 27] total 54 [2022-03-19 02:20:38,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584516710] [2022-03-19 02:20:38,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584516710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:38,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:38,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:20:38,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609685844] [2022-03-19 02:20:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:38,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:20:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:20:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2044, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 02:20:38,126 INFO L87 Difference]: Start difference. First operand 361 states and 470 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:38,393 INFO L93 Difference]: Finished difference Result 393 states and 507 transitions. [2022-03-19 02:20:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:20:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2022-03-19 02:20:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:38,396 INFO L225 Difference]: With dead ends: 393 [2022-03-19 02:20:38,396 INFO L226 Difference]: Without dead ends: 382 [2022-03-19 02:20:38,397 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=894, Invalid=2528, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 02:20:38,397 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:38,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 39 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-19 02:20:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 364. [2022-03-19 02:20:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.3072625698324023) internal successors, (468), 358 states have internal predecessors, (468), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 473 transitions. [2022-03-19 02:20:38,495 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 473 transitions. Word has length 356 [2022-03-19 02:20:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:38,495 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 473 transitions. [2022-03-19 02:20:38,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:38,495 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 473 transitions. [2022-03-19 02:20:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-03-19 02:20:38,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:38,497 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:38,521 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 02:20:38,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 02:20:38,723 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1962575558, now seen corresponding path program 59 times [2022-03-19 02:20:38,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1998907473] [2022-03-19 02:20:38,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:38,725 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:38,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1962575558, now seen corresponding path program 60 times [2022-03-19 02:20:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:38,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022556251] [2022-03-19 02:20:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:38,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:38,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022556251] [2022-03-19 02:20:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022556251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136756138] [2022-03-19 02:20:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:38,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:38,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:38,984 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 02:20:39,014 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 02:20:40,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 02:20:40,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:41,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:41,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136756138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:41,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:41,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-19 02:20:41,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1998907473] [2022-03-19 02:20:41,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1998907473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:41,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:41,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:20:41,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118275166] [2022-03-19 02:20:41,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:41,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:20:41,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:41,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:20:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-19 02:20:41,678 INFO L87 Difference]: Start difference. First operand 364 states and 473 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:41,950 INFO L93 Difference]: Finished difference Result 464 states and 600 transitions. [2022-03-19 02:20:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:20:41,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-03-19 02:20:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:41,952 INFO L225 Difference]: With dead ends: 464 [2022-03-19 02:20:41,952 INFO L226 Difference]: Without dead ends: 453 [2022-03-19 02:20:41,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:20:41,953 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:41,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 44 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-19 02:20:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 367. [2022-03-19 02:20:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.3047091412742382) internal successors, (471), 361 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 476 transitions. [2022-03-19 02:20:42,089 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 476 transitions. Word has length 359 [2022-03-19 02:20:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:42,089 INFO L478 AbstractCegarLoop]: Abstraction has 367 states and 476 transitions. [2022-03-19 02:20:42,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 476 transitions. [2022-03-19 02:20:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-03-19 02:20:42,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:42,092 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:42,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:42,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:42,307 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash -121056614, now seen corresponding path program 61 times [2022-03-19 02:20:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:42,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [20504719] [2022-03-19 02:20:42,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:42,309 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:42,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash -121056614, now seen corresponding path program 62 times [2022-03-19 02:20:42,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:42,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920278600] [2022-03-19 02:20:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:42,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:42,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:42,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920278600] [2022-03-19 02:20:42,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920278600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:42,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919838800] [2022-03-19 02:20:42,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:42,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:42,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:42,595 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 02:20:42,596 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 02:20:43,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:43,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:43,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:20:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:43,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919838800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:44,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:44,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-19 02:20:44,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [20504719] [2022-03-19 02:20:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [20504719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:44,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:44,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:20:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123410805] [2022-03-19 02:20:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:44,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:20:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:20:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:20:44,291 INFO L87 Difference]: Start difference. First operand 367 states and 476 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:44,632 INFO L93 Difference]: Finished difference Result 539 states and 699 transitions. [2022-03-19 02:20:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:20:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-03-19 02:20:44,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:44,634 INFO L225 Difference]: With dead ends: 539 [2022-03-19 02:20:44,634 INFO L226 Difference]: Without dead ends: 528 [2022-03-19 02:20:44,635 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-03-19 02:20:44,635 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:44,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 47 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-19 02:20:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 370. [2022-03-19 02:20:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.3021978021978022) internal successors, (474), 364 states have internal predecessors, (474), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 479 transitions. [2022-03-19 02:20:44,737 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 479 transitions. Word has length 362 [2022-03-19 02:20:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:44,737 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 479 transitions. [2022-03-19 02:20:44,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:44,737 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 479 transitions. [2022-03-19 02:20:44,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-19 02:20:44,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:44,739 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:44,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 02:20:44,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 02:20:44,955 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash 952532282, now seen corresponding path program 63 times [2022-03-19 02:20:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:44,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369804178] [2022-03-19 02:20:44,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:44,957 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:44,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash 952532282, now seen corresponding path program 64 times [2022-03-19 02:20:44,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:44,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236315017] [2022-03-19 02:20:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:44,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:45,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236315017] [2022-03-19 02:20:45,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236315017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72448457] [2022-03-19 02:20:45,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:45,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:45,227 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 02:20:45,228 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 02:20:45,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:45,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 02:20:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 537 proven. 4829 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-19 02:20:46,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 537 proven. 4829 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-19 02:20:47,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72448457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:47,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:47,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 30, 30] total 60 [2022-03-19 02:20:47,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:47,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369804178] [2022-03-19 02:20:47,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369804178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:47,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:47,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:20:47,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982698737] [2022-03-19 02:20:47,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:47,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:20:47,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:47,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:20:47,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 02:20:47,295 INFO L87 Difference]: Start difference. First operand 370 states and 479 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:47,799 INFO L93 Difference]: Finished difference Result 614 states and 798 transitions. [2022-03-19 02:20:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:20:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-03-19 02:20:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:47,820 INFO L225 Difference]: With dead ends: 614 [2022-03-19 02:20:47,821 INFO L226 Difference]: Without dead ends: 603 [2022-03-19 02:20:47,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 02:20:47,822 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:47,826 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 42 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:20:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-19 02:20:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 373. [2022-03-19 02:20:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 367 states have (on average 1.2997275204359673) internal successors, (477), 367 states have internal predecessors, (477), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 482 transitions. [2022-03-19 02:20:47,947 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 482 transitions. Word has length 365 [2022-03-19 02:20:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:47,947 INFO L478 AbstractCegarLoop]: Abstraction has 373 states and 482 transitions. [2022-03-19 02:20:47,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 482 transitions. [2022-03-19 02:20:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-03-19 02:20:47,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:47,949 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 100, 7, 7, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:47,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:48,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 02:20:48,162 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash -382120294, now seen corresponding path program 65 times [2022-03-19 02:20:48,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:48,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133161890] [2022-03-19 02:20:48,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:48,163 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:48,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash -382120294, now seen corresponding path program 66 times [2022-03-19 02:20:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143726636] [2022-03-19 02:20:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15490 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-19 02:20:48,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:48,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143726636] [2022-03-19 02:20:48,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143726636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:48,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655813070] [2022-03-19 02:20:48,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:48,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:48,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:48,439 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 02:20:48,441 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 02:20:59,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-19 02:20:59,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:59,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 02:20:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:59,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-03-19 02:20:59,261 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-19 02:20:59,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-19 02:20:59,412 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-19 02:20:59,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-19 02:20:59,520 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-19 02:20:59,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-19 02:20:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:59,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:20:59,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:20:59,617 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-19 02:20:59,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 58 [2022-03-19 02:20:59,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:59,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:20:59,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:20:59,819 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-19 02:20:59,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 73 [2022-03-19 02:21:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:21:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:21:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:21:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:21:00,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:21:00,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:21:00,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:21:00,380 INFO L356 Elim1Store]: treesize reduction 99, result has 19.5 percent of original size [2022-03-19 02:21:00,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 81 treesize of output 91 [2022-03-19 02:21:00,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:21:00,561 INFO L356 Elim1Store]: treesize reduction 50, result has 35.1 percent of original size [2022-03-19 02:21:00,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 61 [2022-03-19 02:21:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15490 backedges. 519 proven. 17 refuted. 0 times theorem prover too weak. 14954 trivial. 0 not checked. [2022-03-19 02:21:00,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:08,987 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_1176 Int)) (or (not (<= v_main_~x~0_1176 (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)))) (forall ((v_ArrVal_6099 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0)) (.cse2 (* c_main_~j~0 4))) (<= (select .cse0 (+ (* 4 (select (select .cse1 |c_main_~#Dest~0.base|) (+ .cse2 4 |c_main_~#Dest~0.offset|))) |c_main_~#distance~0.offset|)) (+ (select .cse0 (+ (* (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| .cse2 4)) 4) |c_main_~#distance~0.offset|)) (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| .cse2 4))))))))) is different from false [2022-03-19 02:21:11,027 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_1176 Int) (v_ArrVal_6099 Int)) (or (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) 4) |c_main_~#distance~0.offset|)) (+ (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| 4)) 4) |c_main_~#distance~0.offset|)))))) (not (<= v_main_~x~0_1176 (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|))))) is different from false [2022-03-19 02:21:25,554 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (not (< (+ main_~i~0 1) c_main_~nodecount~0)) (< (+ main_~i~0 2) c_main_~nodecount~0) (forall ((v_ArrVal_6098 Int) (v_ArrVal_6096 Int) (v_main_~x~0_1176 Int) (v_ArrVal_6099 Int)) (let ((.cse2 (let ((.cse3 (* main_~i~0 4))) (store (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| .cse3) v_ArrVal_6096) (+ 4 |c_main_~#distance~0.offset| .cse3) v_ArrVal_6098)))) (or (let ((.cse0 (store .cse2 (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) 4) |c_main_~#distance~0.offset|)) (+ (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| 4)) (select .cse0 (+ (* 4 (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| 4))) |c_main_~#distance~0.offset|)))))) (not (<= v_main_~x~0_1176 (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse2) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|))) (not (<= c_~INFINITY~0 v_ArrVal_6098)) (not (<= v_ArrVal_6096 c_~INFINITY~0))))))) is different from false [2022-03-19 02:21:26,403 INFO L356 Elim1Store]: treesize reduction 414, result has 23.8 percent of original size [2022-03-19 02:21:26,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 34154 treesize of output 15154