/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 01:03:23,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:03:23,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:03:24,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 01:03:24,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 01:03:24,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 01:03:24,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 01:03:24,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 01:03:24,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 01:03:24,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 01:03:24,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 01:03:24,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 01:03:24,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 01:03:24,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 01:03:24,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 01:03:24,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 01:03:24,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 01:03:24,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 01:03:24,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 01:03:24,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 01:03:24,091 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 01:03:24,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 01:03:24,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 01:03:24,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 01:03:24,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 01:03:24,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 01:03:24,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 01:03:24,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 01:03:24,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 01:03:24,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 01:03:24,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 01:03:24,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 01:03:24,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 01:03:24,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 01:03:24,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 01:03:24,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 01:03:24,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 01:03:24,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 01:03:24,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 01:03:24,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:03:24,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:03:24,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:03:24,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 01:03:24,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:03:24,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:03:24,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:03:24,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:03:24,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:03:24,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:03:24,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:03:24,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:03:24,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:03:24,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:03:24,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:03:24,120 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:03:24,120 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:03:24,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:03:24,120 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:03:24,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:03:24,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:03:24,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:03:24,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:03:24,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:03:24,298 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:03:24,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-18 01:03:24,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75dd5e30/edd389920b7e4a19a61a7163a234fca6/FLAG7cf92a8ea [2022-03-18 01:03:24,722 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:03:24,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-18 01:03:24,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75dd5e30/edd389920b7e4a19a61a7163a234fca6/FLAG7cf92a8ea [2022-03-18 01:03:24,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75dd5e30/edd389920b7e4a19a61a7163a234fca6 [2022-03-18 01:03:24,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:03:24,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:03:24,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:03:24,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:03:24,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:03:24,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:24,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c881e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24, skipping insertion in model container [2022-03-18 01:03:24,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:24,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:03:24,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:03:24,924 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-03-18 01:03:24,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:03:24,933 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:03:24,955 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-03-18 01:03:24,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:03:24,967 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:03:24,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24 WrapperNode [2022-03-18 01:03:24,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:03:24,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:03:24,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:03:24,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:03:24,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:24,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:25,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:25,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:25,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:25,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:25,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:25,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:03:25,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:03:25,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:03:25,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:03:25,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (1/1) ... [2022-03-18 01:03:25,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:03:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:25,052 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) [2022-03-18 01:03:25,064 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 [2022-03-18 01:03:25,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:03:25,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:03:25,084 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:03:25,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:03:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:03:25,122 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:03:25,123 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:03:25,279 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:03:25,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:03:25,283 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 01:03:25,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:03:25 BoogieIcfgContainer [2022-03-18 01:03:25,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:03:25,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:03:25,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:03:25,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:03:25,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:03:24" (1/3) ... [2022-03-18 01:03:25,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c39e76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:03:25, skipping insertion in model container [2022-03-18 01:03:25,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:03:24" (2/3) ... [2022-03-18 01:03:25,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c39e76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:03:25, skipping insertion in model container [2022-03-18 01:03:25,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:03:25" (3/3) ... [2022-03-18 01:03:25,290 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-03-18 01:03:25,293 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:03:25,293 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:03:25,320 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:03:25,325 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 [2022-03-18 01:03:25,325 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:03:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 01:03:25,338 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:25,339 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:25,339 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 764687304, now seen corresponding path program 1 times [2022-03-18 01:03:25,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:25,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1563566585] [2022-03-18 01:03:25,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:03:25,357 INFO L85 PathProgramCache]: Analyzing trace with hash 764687304, now seen corresponding path program 2 times [2022-03-18 01:03:25,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:25,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833531081] [2022-03-18 01:03:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:25,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:25,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:25,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:25,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833531081] [2022-03-18 01:03:25,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833531081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:25,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:25,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:03:25,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1563566585] [2022-03-18 01:03:25,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1563566585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:25,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:25,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:03:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071702594] [2022-03-18 01:03:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:25,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:03:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:03:25,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:03:25,590 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:25,731 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2022-03-18 01:03:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:03:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 01:03:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:25,739 INFO L225 Difference]: With dead ends: 45 [2022-03-18 01:03:25,739 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 01:03:25,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 01:03:25,746 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:25,748 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:03:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 01:03:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 01:03:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-18 01:03:25,781 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-03-18 01:03:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:25,781 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-18 01:03:25,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-18 01:03:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 01:03:25,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:25,783 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:25,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:03:25,783 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash 296825287, now seen corresponding path program 1 times [2022-03-18 01:03:25,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:25,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623634738] [2022-03-18 01:03:25,891 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException [2022-03-18 01:03:25,891 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 01:03:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash 296825287, now seen corresponding path program 2 times [2022-03-18 01:03:25,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:25,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693055824] [2022-03-18 01:03:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:25,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 01:03:26,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:26,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693055824] [2022-03-18 01:03:26,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693055824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:26,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:26,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:26,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623634738] [2022-03-18 01:03:26,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623634738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:26,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:26,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941881883] [2022-03-18 01:03:26,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:26,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 01:03:26,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 01:03:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 01:03:26,084 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:26,134 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-03-18 01:03:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 01:03:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-18 01:03:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:26,135 INFO L225 Difference]: With dead ends: 36 [2022-03-18 01:03:26,135 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 01:03:26,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:03:26,136 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:26,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:03:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 01:03:26,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-18 01:03:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-03-18 01:03:26,144 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2022-03-18 01:03:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:26,144 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-03-18 01:03:26,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-03-18 01:03:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 01:03:26,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:26,145 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:26,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 01:03:26,146 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -17409223, now seen corresponding path program 1 times [2022-03-18 01:03:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:26,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358435620] [2022-03-18 01:03:26,216 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1773718599, now seen corresponding path program 1 times [2022-03-18 01:03:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:26,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434761190] [2022-03-18 01:03:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 01:03:26,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:26,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434761190] [2022-03-18 01:03:26,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434761190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:26,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:26,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:03:26,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358435620] [2022-03-18 01:03:26,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358435620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:26,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:26,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:03:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852843288] [2022-03-18 01:03:26,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:26,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 01:03:26,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 01:03:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:03:26,384 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:26,461 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-18 01:03:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:03:26,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 01:03:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:26,462 INFO L225 Difference]: With dead ends: 58 [2022-03-18 01:03:26,463 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 01:03:26,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:03:26,464 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:26,464 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 18 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:03:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 01:03:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-03-18 01:03:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-03-18 01:03:26,470 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2022-03-18 01:03:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:26,470 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-03-18 01:03:26,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-03-18 01:03:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 01:03:26,471 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:26,471 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:26,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 01:03:26,471 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2030128119, now seen corresponding path program 1 times [2022-03-18 01:03:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:26,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [915126684] [2022-03-18 01:03:26,770 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 01:03:26,770 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 01:03:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2030128119, now seen corresponding path program 2 times [2022-03-18 01:03:26,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:26,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115486309] [2022-03-18 01:03:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:26,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 01:03:26,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115486309] [2022-03-18 01:03:26,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115486309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374973345] [2022-03-18 01:03:26,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:03:26,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:26,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:26,887 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) [2022-03-18 01:03:26,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 01:03:26,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 01:03:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 01:03:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:03:27,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:03:27,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374973345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:27,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:03:27,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-03-18 01:03:27,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [915126684] [2022-03-18 01:03:27,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [915126684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:27,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:27,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389222094] [2022-03-18 01:03:27,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:27,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 01:03:27,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 01:03:27,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:03:27,066 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:27,141 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2022-03-18 01:03:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 01:03:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-18 01:03:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:27,143 INFO L225 Difference]: With dead ends: 68 [2022-03-18 01:03:27,143 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 01:03:27,143 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:03:27,144 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:27,144 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:03:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 01:03:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2022-03-18 01:03:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-03-18 01:03:27,153 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2022-03-18 01:03:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:27,153 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-03-18 01:03:27,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-03-18 01:03:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 01:03:27,154 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:27,154 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:27,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 01:03:27,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:27,374 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1173178741, now seen corresponding path program 3 times [2022-03-18 01:03:27,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:27,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807380436] [2022-03-18 01:03:27,690 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 01:03:27,690 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 01:03:27,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1173178741, now seen corresponding path program 4 times [2022-03-18 01:03:27,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:27,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349668183] [2022-03-18 01:03:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:27,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:27,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 01:03:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349668183] [2022-03-18 01:03:27,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349668183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872812941] [2022-03-18 01:03:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:03:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:27,853 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) [2022-03-18 01:03:27,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 01:03:27,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:03:27,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:27,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 01:03:27,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 01:03:27,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:03:27,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872812941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:27,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:03:27,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-03-18 01:03:27,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807380436] [2022-03-18 01:03:27,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807380436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:27,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:27,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:03:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80568735] [2022-03-18 01:03:27,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:27,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:03:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:03:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:03:27,978 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:28,083 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-03-18 01:03:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:03:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 01:03:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:28,085 INFO L225 Difference]: With dead ends: 104 [2022-03-18 01:03:28,085 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 01:03:28,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:03:28,086 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:28,086 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 28 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:03:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 01:03:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2022-03-18 01:03:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-03-18 01:03:28,109 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2022-03-18 01:03:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:28,110 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-03-18 01:03:28,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-03-18 01:03:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 01:03:28,110 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:28,110 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:28,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 01:03:28,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:28,311 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1672769145, now seen corresponding path program 1 times [2022-03-18 01:03:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:28,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083205000]