/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-tiling/pr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:04:40,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:04:40,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:04:40,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:04:40,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:04:40,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:04:40,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:04:40,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:04:40,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:04:40,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:04:40,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:04:40,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:04:40,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:04:40,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:04:40,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:04:40,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:04:40,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:04:40,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:04:40,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:04:40,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:04:40,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:04:40,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:04:40,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:04:40,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:04:40,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:04:40,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:04:40,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:04:40,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:04:40,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:04:40,960 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:04:40,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:04:40,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:04:40,962 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:04:40,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:04:40,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:04:40,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:04:40,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:04:40,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:04:40,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:04:40,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:04:40,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:04:40,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:04:40,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:04:40,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:04:40,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:04:40,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:04:40,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:04:40,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:04:40,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:04:40,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:04:40,965 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:04:40,965 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:04:41,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:04:41,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:04:41,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:04:41,205 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:04:41,205 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:04:41,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr4.c [2022-01-31 09:04:41,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976c60800/de482191d534488b998651498365a5fa/FLAG90b8f0c38 [2022-01-31 09:04:41,616 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:04:41,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr4.c [2022-01-31 09:04:41,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976c60800/de482191d534488b998651498365a5fa/FLAG90b8f0c38 [2022-01-31 09:04:41,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976c60800/de482191d534488b998651498365a5fa [2022-01-31 09:04:41,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:04:41,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:04:41,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:04:41,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:04:41,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:04:41,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fea0647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41, skipping insertion in model container [2022-01-31 09:04:41,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:04:41,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:04:41,836 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr4.c[394,407] [2022-01-31 09:04:41,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:04:41,855 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:04:41,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr4.c[394,407] [2022-01-31 09:04:41,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:04:41,888 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:04:41,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41 WrapperNode [2022-01-31 09:04:41,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:04:41,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:04:41,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:04:41,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:04:41,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:04:41,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:04:41,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:04:41,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:04:41,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (1/1) ... [2022-01-31 09:04:41,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:04:41,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:41,942 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) [2022-01-31 09:04:41,947 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 [2022-01-31 09:04:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:04:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:04:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:04:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:04:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:04:41,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:04:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:04:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:04:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:04:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:04:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:04:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:04:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:04:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:04:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:04:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:04:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:04:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:04:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:04:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:04:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:04:42,022 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:04:42,023 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:04:42,197 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:04:42,202 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:04:42,203 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:04:42,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:04:42 BoogieIcfgContainer [2022-01-31 09:04:42,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:04:42,205 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:04:42,205 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:04:42,206 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:04:42,208 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:04:42" (1/1) ... [2022-01-31 09:04:42,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:04:42 BasicIcfg [2022-01-31 09:04:42,238 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:04:42,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:04:42,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:04:42,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:04:42,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:04:41" (1/4) ... [2022-01-31 09:04:42,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5e2a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:04:42, skipping insertion in model container [2022-01-31 09:04:42,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:41" (2/4) ... [2022-01-31 09:04:42,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5e2a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:04:42, skipping insertion in model container [2022-01-31 09:04:42,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:04:42" (3/4) ... [2022-01-31 09:04:42,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5e2a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:04:42, skipping insertion in model container [2022-01-31 09:04:42,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:04:42" (4/4) ... [2022-01-31 09:04:42,247 INFO L111 eAbstractionObserver]: Analyzing ICFG pr4.cJordan [2022-01-31 09:04:42,251 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:04:42,251 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:04:42,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:04:42,297 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:04:42,297 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:04:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 28 states have (on average 1.5) internal successors, (42), 29 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:04:42,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:42,322 INFO L514 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] [2022-01-31 09:04:42,324 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:42,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1430657499, now seen corresponding path program 1 times [2022-01-31 09:04:42,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:42,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107808042] [2022-01-31 09:04:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:42,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:42,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:42,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:42,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:42,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107808042] [2022-01-31 09:04:42,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107808042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:42,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:42,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:04:42,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767130675] [2022-01-31 09:04:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:42,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:04:42,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:42,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:04:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:04:42,640 INFO L87 Difference]: Start difference. First operand has 38 states, 28 states have (on average 1.5) internal successors, (42), 29 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:42,725 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-01-31 09:04:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:04:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:04:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:42,735 INFO L225 Difference]: With dead ends: 38 [2022-01-31 09:04:42,736 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 09:04:42,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:04:42,742 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:42,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 09:04:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 09:04:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:04:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-31 09:04:42,766 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 22 [2022-01-31 09:04:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:42,766 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-31 09:04:42,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-31 09:04:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:04:42,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:42,768 INFO L514 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] [2022-01-31 09:04:42,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:04:42,768 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash 441235555, now seen corresponding path program 1 times [2022-01-31 09:04:42,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:42,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391117923] [2022-01-31 09:04:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:42,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:42,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:42,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:42,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391117923] [2022-01-31 09:04:42,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391117923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:42,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:42,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:04:42,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294644814] [2022-01-31 09:04:42,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:42,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:04:42,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:42,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:04:42,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:04:42,884 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:42,978 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-01-31 09:04:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:04:42,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:04:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:42,979 INFO L225 Difference]: With dead ends: 38 [2022-01-31 09:04:42,980 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 09:04:42,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:04:42,981 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:42,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 114 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 09:04:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 09:04:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-01-31 09:04:42,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2022-01-31 09:04:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:42,988 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-01-31 09:04:42,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-01-31 09:04:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:04:42,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:42,989 INFO L514 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] [2022-01-31 09:04:42,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:04:42,989 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash 442159076, now seen corresponding path program 1 times [2022-01-31 09:04:42,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:42,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203123742] [2022-01-31 09:04:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:42,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:43,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:43,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:43,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:43,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203123742] [2022-01-31 09:04:43,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203123742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:43,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:43,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:04:43,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643683157] [2022-01-31 09:04:43,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:43,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:04:43,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:04:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:04:43,174 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:43,285 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 09:04:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:04:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 09:04:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:43,289 INFO L225 Difference]: With dead ends: 43 [2022-01-31 09:04:43,290 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 09:04:43,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:04:43,297 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:43,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 31 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 09:04:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-31 09:04:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-31 09:04:43,303 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-01-31 09:04:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:43,303 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-31 09:04:43,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-31 09:04:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:04:43,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:43,304 INFO L514 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] [2022-01-31 09:04:43,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:04:43,305 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1501232272, now seen corresponding path program 1 times [2022-01-31 09:04:43,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:43,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500777482] [2022-01-31 09:04:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:43,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:43,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:43,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:43,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500777482] [2022-01-31 09:04:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500777482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446003636] [2022-01-31 09:04:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:43,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:43,587 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) [2022-01-31 09:04:43,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:04:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:43,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 09:04:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:43,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:43,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:43,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:43,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:04:43,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-31 09:04:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:44,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:44,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2022-01-31 09:04:44,189 INFO L387 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 24 treesize of output 22 [2022-01-31 09:04:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:44,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446003636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:44,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:44,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2022-01-31 09:04:44,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821047854] [2022-01-31 09:04:44,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:44,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:04:44,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:04:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:04:44,246 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:04:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:45,000 INFO L93 Difference]: Finished difference Result 110 states and 151 transitions. [2022-01-31 09:04:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 09:04:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-01-31 09:04:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:45,003 INFO L225 Difference]: With dead ends: 110 [2022-01-31 09:04:45,003 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 09:04:45,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:04:45,004 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 174 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:45,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 128 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:04:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 09:04:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 56. [2022-01-31 09:04:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2022-01-31 09:04:45,026 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 28 [2022-01-31 09:04:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:45,026 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2022-01-31 09:04:45,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:04:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2022-01-31 09:04:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:04:45,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:45,028 INFO L514 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] [2022-01-31 09:04:45,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:45,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:45,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:45,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:45,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1794635279, now seen corresponding path program 1 times [2022-01-31 09:04:45,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:45,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866280749] [2022-01-31 09:04:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:45,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:45,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:45,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:45,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:45,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866280749] [2022-01-31 09:04:45,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866280749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:45,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:45,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:04:45,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799247270] [2022-01-31 09:04:45,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:45,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:04:45,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:04:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:04:45,337 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:45,417 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-01-31 09:04:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:04:45,417 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-01-31 09:04:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:45,418 INFO L225 Difference]: With dead ends: 62 [2022-01-31 09:04:45,418 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 09:04:45,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:04:45,419 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:45,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 09:04:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-01-31 09:04:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 47 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-01-31 09:04:45,430 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-01-31 09:04:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:45,430 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-01-31 09:04:45,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-01-31 09:04:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:04:45,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:45,432 INFO L514 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] [2022-01-31 09:04:45,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 09:04:45,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:45,433 INFO L85 PathProgramCache]: Analyzing trace with hash 703380658, now seen corresponding path program 1 times [2022-01-31 09:04:45,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:45,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136104128] [2022-01-31 09:04:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:45,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:45,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:45,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:45,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:45,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136104128] [2022-01-31 09:04:45,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136104128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:45,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614266237] [2022-01-31 09:04:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:45,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:45,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:45,652 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) [2022-01-31 09:04:45,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:04:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:45,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 09:04:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:45,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:45,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:45,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:45,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:04:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:45,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:45,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2022-01-31 09:04:45,996 INFO L387 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 24 treesize of output 22 [2022-01-31 09:04:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:46,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614266237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:46,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:46,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2022-01-31 09:04:46,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886396936] [2022-01-31 09:04:46,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:46,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 09:04:46,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 09:04:46,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:04:46,037 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:46,376 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2022-01-31 09:04:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:04:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-01-31 09:04:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:46,378 INFO L225 Difference]: With dead ends: 104 [2022-01-31 09:04:46,378 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 09:04:46,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:04:46,379 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 96 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:46,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 174 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:04:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 09:04:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2022-01-31 09:04:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 56 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-01-31 09:04:46,384 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 28 [2022-01-31 09:04:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:46,384 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-01-31 09:04:46,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-01-31 09:04:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 09:04:46,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:46,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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] [2022-01-31 09:04:46,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:46,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 09:04:46,586 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1963526849, now seen corresponding path program 1 times [2022-01-31 09:04:46,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228338987] [2022-01-31 09:04:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:46,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:46,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228338987] [2022-01-31 09:04:46,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228338987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:46,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:46,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:04:46,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943456267] [2022-01-31 09:04:46,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:46,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:04:46,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:04:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:46,652 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:46,704 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2022-01-31 09:04:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:04:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 09:04:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:46,705 INFO L225 Difference]: With dead ends: 64 [2022-01-31 09:04:46,705 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 09:04:46,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:46,706 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:46,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 55 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:04:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 09:04:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-01-31 09:04:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 49 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2022-01-31 09:04:46,710 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 34 [2022-01-31 09:04:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:46,711 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2022-01-31 09:04:46,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2022-01-31 09:04:46,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 09:04:46,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:46,712 INFO L514 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, 1, 1, 1, 1, 1] [2022-01-31 09:04:46,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 09:04:46,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:46,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2103004955, now seen corresponding path program 1 times [2022-01-31 09:04:46,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:46,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108685315] [2022-01-31 09:04:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:46,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:04:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:46,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108685315] [2022-01-31 09:04:46,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108685315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213678420] [2022-01-31 09:04:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:46,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:46,920 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) [2022-01-31 09:04:46,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:04:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 09:04:46,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:47,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:47,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:47,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:47,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:04:47,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-31 09:04:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:47,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:48,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:04:48,057 INFO L387 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 34 treesize of output 30 [2022-01-31 09:04:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:48,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213678420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:48,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:48,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-31 09:04:48,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657992236] [2022-01-31 09:04:48,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:48,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:04:48,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:04:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:04:48,183 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:04:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:49,367 INFO L93 Difference]: Finished difference Result 146 states and 187 transitions. [2022-01-31 09:04:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 09:04:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 37 [2022-01-31 09:04:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:49,369 INFO L225 Difference]: With dead ends: 146 [2022-01-31 09:04:49,369 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 09:04:49,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=445, Invalid=2311, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 09:04:49,371 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 221 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:49,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 246 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 794 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-01-31 09:04:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 09:04:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 77. [2022-01-31 09:04:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.265625) internal successors, (81), 66 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:04:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-01-31 09:04:49,378 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 37 [2022-01-31 09:04:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-01-31 09:04:49,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:04:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-01-31 09:04:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 09:04:49,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:49,390 INFO L514 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, 1, 1, 1, 1, 1] [2022-01-31 09:04:49,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:49,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:49,595 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -132524646, now seen corresponding path program 1 times [2022-01-31 09:04:49,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388563086] [2022-01-31 09:04:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:49,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:04:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:49,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388563086] [2022-01-31 09:04:49,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388563086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121039800] [2022-01-31 09:04:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:49,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:49,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:49,814 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) [2022-01-31 09:04:49,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:04:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:04:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:49,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:49,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:49,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:04:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:50,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:50,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:04:50,201 INFO L387 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 30 treesize of output 26 [2022-01-31 09:04:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:50,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121039800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:50,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:50,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-31 09:04:50,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467484642] [2022-01-31 09:04:50,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:50,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:04:50,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:50,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:04:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:04:50,247 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:04:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:50,741 INFO L93 Difference]: Finished difference Result 152 states and 191 transitions. [2022-01-31 09:04:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:04:50,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-01-31 09:04:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:50,743 INFO L225 Difference]: With dead ends: 152 [2022-01-31 09:04:50,743 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 09:04:50,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 09:04:50,744 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 85 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:50,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 218 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 641 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-01-31 09:04:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 09:04:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2022-01-31 09:04:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 87 states have internal predecessors, (107), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:04:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-01-31 09:04:50,751 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 37 [2022-01-31 09:04:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:50,752 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-01-31 09:04:50,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:04:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-01-31 09:04:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 09:04:50,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:50,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1] [2022-01-31 09:04:50,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:50,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:50,976 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1336741108, now seen corresponding path program 1 times [2022-01-31 09:04:50,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:50,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443543264] [2022-01-31 09:04:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:50,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:04:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:04:51,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:51,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443543264] [2022-01-31 09:04:51,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443543264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:51,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:51,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:04:51,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454730043] [2022-01-31 09:04:51,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:51,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:04:51,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:51,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:04:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:51,014 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:51,065 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2022-01-31 09:04:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:04:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-01-31 09:04:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:51,066 INFO L225 Difference]: With dead ends: 107 [2022-01-31 09:04:51,066 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 09:04:51,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:51,067 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:51,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:04:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 09:04:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2022-01-31 09:04:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 84 states have (on average 1.25) internal successors, (105), 87 states have internal predecessors, (105), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:04:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2022-01-31 09:04:51,073 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 43 [2022-01-31 09:04:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:51,073 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2022-01-31 09:04:51,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2022-01-31 09:04:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 09:04:51,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:51,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1] [2022-01-31 09:04:51,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 09:04:51,075 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash -586478004, now seen corresponding path program 2 times [2022-01-31 09:04:51,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:51,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179877246] [2022-01-31 09:04:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:51,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:04:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:04:51,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:51,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179877246] [2022-01-31 09:04:51,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179877246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:51,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:51,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:04:51,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187455835] [2022-01-31 09:04:51,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:51,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:04:51,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:51,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:04:51,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:51,117 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:51,167 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2022-01-31 09:04:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:04:51,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-01-31 09:04:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:51,168 INFO L225 Difference]: With dead ends: 98 [2022-01-31 09:04:51,168 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 09:04:51,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:51,169 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:51,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 68 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:04:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 09:04:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-01-31 09:04:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 78 states have internal predecessors, (92), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:04:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2022-01-31 09:04:51,173 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 43 [2022-01-31 09:04:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:51,173 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2022-01-31 09:04:51,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2022-01-31 09:04:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 09:04:51,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:51,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-01-31 09:04:51,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 09:04:51,175 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash -969411632, now seen corresponding path program 2 times [2022-01-31 09:04:51,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:51,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286604846] [2022-01-31 09:04:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:51,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:04:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 09:04:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:51,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:51,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286604846] [2022-01-31 09:04:51,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286604846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:51,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037826477] [2022-01-31 09:04:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:04:51,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:51,304 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) [2022-01-31 09:04:51,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:04:51,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:04:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:51,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:04:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:51,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:51,451 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:51,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:04:51,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-31 09:04:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:51,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:51,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:04:51,746 INFO L387 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 30 treesize of output 26 [2022-01-31 09:04:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:51,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037826477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:51,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:51,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-01-31 09:04:51,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564970628] [2022-01-31 09:04:51,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:51,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:04:51,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:04:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:04:51,792 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:04:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:52,594 INFO L93 Difference]: Finished difference Result 193 states and 240 transitions. [2022-01-31 09:04:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 09:04:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 46 [2022-01-31 09:04:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:52,596 INFO L225 Difference]: With dead ends: 193 [2022-01-31 09:04:52,596 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 09:04:52,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 09:04:52,597 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 94 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:52,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 166 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:04:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 09:04:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 100. [2022-01-31 09:04:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 85 states have internal predecessors, (99), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:04:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2022-01-31 09:04:52,605 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 46 [2022-01-31 09:04:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:52,605 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2022-01-31 09:04:52,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:04:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2022-01-31 09:04:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 09:04:52,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:52,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-01-31 09:04:52,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:52,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 09:04:52,819 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash -276309935, now seen corresponding path program 1 times [2022-01-31 09:04:52,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184913023] [2022-01-31 09:04:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:52,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:04:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 09:04:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:52,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:52,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184913023] [2022-01-31 09:04:52,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184913023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:52,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626281857] [2022-01-31 09:04:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:52,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:52,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:52,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:04:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:04:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:53,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:53,064 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:53,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:05:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:05:01,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:03,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:05:03,347 INFO L387 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 30 treesize of output 26 [2022-01-31 09:05:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:05:03,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626281857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:03,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 17 [2022-01-31 09:05:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572078457] [2022-01-31 09:05:03,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:03,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 09:05:03,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 09:05:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=225, Unknown=3, NotChecked=0, Total=272 [2022-01-31 09:05:03,378 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 17 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 09:05:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:10,044 INFO L93 Difference]: Finished difference Result 274 states and 329 transitions. [2022-01-31 09:05:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 09:05:10,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 46 [2022-01-31 09:05:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:10,047 INFO L225 Difference]: With dead ends: 274 [2022-01-31 09:05:10,047 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 09:05:10,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=217, Invalid=1183, Unknown=6, NotChecked=0, Total=1406 [2022-01-31 09:05:10,048 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 70 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:10,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 224 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 750 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-01-31 09:05:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 09:05:10,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 167. [2022-01-31 09:05:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 140 states have (on average 1.2357142857142858) internal successors, (173), 146 states have internal predecessors, (173), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 8 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 09:05:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2022-01-31 09:05:10,054 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 46 [2022-01-31 09:05:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:10,055 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2022-01-31 09:05:10,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 09:05:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2022-01-31 09:05:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 09:05:10,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:10,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1] [2022-01-31 09:05:10,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:10,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:10,263 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1535036091, now seen corresponding path program 3 times [2022-01-31 09:05:10,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:10,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733636676] [2022-01-31 09:05:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:10,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:10,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:10,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:05:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:10,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 09:05:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:10,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:05:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:10,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733636676] [2022-01-31 09:05:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733636676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642918789] [2022-01-31 09:05:10,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:05:10,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:10,480 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) [2022-01-31 09:05:10,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:05:10,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:05:10,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 09:05:10,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:10,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:05:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:10,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:19,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:05:19,020 INFO L387 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 30 treesize of output 26 [2022-01-31 09:05:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:19,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642918789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:19,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:19,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 26 [2022-01-31 09:05:19,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096862212] [2022-01-31 09:05:19,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:19,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:05:19,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:05:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=550, Unknown=4, NotChecked=0, Total=650 [2022-01-31 09:05:19,056 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand has 26 states, 25 states have (on average 3.32) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:26,128 INFO L93 Difference]: Finished difference Result 454 states and 565 transitions. [2022-01-31 09:05:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 09:05:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.32) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 55 [2022-01-31 09:05:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:26,131 INFO L225 Difference]: With dead ends: 454 [2022-01-31 09:05:26,131 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 09:05:26,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 103 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=414, Invalid=2442, Unknown=6, NotChecked=0, Total=2862 [2022-01-31 09:05:26,132 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 131 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:26,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 390 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1343 Invalid, 0 Unknown, 71 Unchecked, 0.7s Time] [2022-01-31 09:05:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 09:05:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 352. [2022-01-31 09:05:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 299 states have (on average 1.2374581939799332) internal successors, (370), 312 states have internal predecessors, (370), 32 states have call successors, (32), 22 states have call predecessors, (32), 20 states have return successors, (31), 17 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 09:05:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 433 transitions. [2022-01-31 09:05:26,144 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 433 transitions. Word has length 55 [2022-01-31 09:05:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:26,144 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 433 transitions. [2022-01-31 09:05:26,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.32) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 433 transitions. [2022-01-31 09:05:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 09:05:26,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:26,146 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1] [2022-01-31 09:05:26,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:26,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:26,351 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1205270330, now seen corresponding path program 1 times [2022-01-31 09:05:26,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392319851] [2022-01-31 09:05:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:26,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:26,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:26,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:05:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 09:05:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:05:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:26,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:26,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392319851] [2022-01-31 09:05:26,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392319851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:26,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452516257] [2022-01-31 09:05:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:26,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:26,562 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) [2022-01-31 09:05:26,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:05:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:05:26,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:26,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:05:26,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-31 09:05:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:26,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:26,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:05:26,965 INFO L387 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 30 treesize of output 26 [2022-01-31 09:05:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:27,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452516257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:27,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:27,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-31 09:05:27,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048694671] [2022-01-31 09:05:27,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:27,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 09:05:27,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 09:05:27,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-31 09:05:27,003 INFO L87 Difference]: Start difference. First operand 352 states and 433 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:28,051 INFO L93 Difference]: Finished difference Result 544 states and 668 transitions. [2022-01-31 09:05:28,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 09:05:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 55 [2022-01-31 09:05:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:28,054 INFO L225 Difference]: With dead ends: 544 [2022-01-31 09:05:28,054 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 09:05:28,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 09:05:28,055 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 179 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:28,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 215 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:05:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 09:05:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 419. [2022-01-31 09:05:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 355 states have (on average 1.2197183098591549) internal successors, (433), 374 states have internal predecessors, (433), 43 states have call successors, (43), 22 states have call predecessors, (43), 20 states have return successors, (42), 22 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 09:05:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 518 transitions. [2022-01-31 09:05:28,067 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 518 transitions. Word has length 55 [2022-01-31 09:05:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:28,068 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 518 transitions. [2022-01-31 09:05:28,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 518 transitions. [2022-01-31 09:05:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 09:05:28,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:28,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:28,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:28,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 09:05:28,292 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1600133911, now seen corresponding path program 1 times [2022-01-31 09:05:28,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:28,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610628762] [2022-01-31 09:05:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:28,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:05:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:05:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 09:05:28,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610628762] [2022-01-31 09:05:28,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610628762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:28,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:28,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:05:28,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751476156] [2022-01-31 09:05:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:28,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:05:28,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:05:28,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:05:28,332 INFO L87 Difference]: Start difference. First operand 419 states and 518 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:05:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:28,393 INFO L93 Difference]: Finished difference Result 436 states and 536 transitions. [2022-01-31 09:05:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:05:28,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-01-31 09:05:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:28,396 INFO L225 Difference]: With dead ends: 436 [2022-01-31 09:05:28,396 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 09:05:28,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:05:28,397 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:28,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 67 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:05:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 09:05:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 419. [2022-01-31 09:05:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 355 states have (on average 1.2028169014084507) internal successors, (427), 374 states have internal predecessors, (427), 43 states have call successors, (43), 22 states have call predecessors, (43), 20 states have return successors, (42), 22 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 09:05:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 512 transitions. [2022-01-31 09:05:28,412 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 512 transitions. Word has length 58 [2022-01-31 09:05:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:28,412 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 512 transitions. [2022-01-31 09:05:28,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:05:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 512 transitions. [2022-01-31 09:05:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 09:05:28,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:28,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:28,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 09:05:28,414 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash 818448683, now seen corresponding path program 2 times [2022-01-31 09:05:28,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:28,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304603482] [2022-01-31 09:05:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:28,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:05:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:05:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:05:28,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:28,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304603482] [2022-01-31 09:05:28,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304603482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:28,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512696265] [2022-01-31 09:05:28,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:05:28,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:28,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:28,624 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) [2022-01-31 09:05:28,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:05:28,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:05:28,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 09:05:28,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:28,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:05:28,752 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:28,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:05:28,773 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:28,791 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:28,806 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:28,820 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:28,853 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:28,866 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:28,879 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:28,894 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:28,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:05:35,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:38,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:05:38,211 INFO L387 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 30 treesize of output 26 [2022-01-31 09:05:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 09:05:38,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512696265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:38,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:38,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:05:38,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686190712] [2022-01-31 09:05:38,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:05:38,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:05:38,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=347, Unknown=3, NotChecked=0, Total=420 [2022-01-31 09:05:38,242 INFO L87 Difference]: Start difference. First operand 419 states and 512 transitions. Second operand has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 09:05:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:42,944 INFO L93 Difference]: Finished difference Result 568 states and 672 transitions. [2022-01-31 09:05:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 09:05:42,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2022-01-31 09:05:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:42,947 INFO L225 Difference]: With dead ends: 568 [2022-01-31 09:05:42,947 INFO L226 Difference]: Without dead ends: 568 [2022-01-31 09:05:42,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=276, Invalid=1525, Unknown=5, NotChecked=0, Total=1806 [2022-01-31 09:05:42,949 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 81 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:42,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 282 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 981 Invalid, 0 Unknown, 92 Unchecked, 0.5s Time] [2022-01-31 09:05:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-31 09:05:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 428. [2022-01-31 09:05:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 361 states have (on average 1.1939058171745152) internal successors, (431), 379 states have internal predecessors, (431), 42 states have call successors, (42), 26 states have call predecessors, (42), 24 states have return successors, (41), 22 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 09:05:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 514 transitions. [2022-01-31 09:05:42,963 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 514 transitions. Word has length 58 [2022-01-31 09:05:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:42,963 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 514 transitions. [2022-01-31 09:05:42,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 09:05:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 514 transitions. [2022-01-31 09:05:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 09:05:42,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:42,965 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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, 1] [2022-01-31 09:05:42,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 09:05:43,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 09:05:43,189 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash -118256592, now seen corresponding path program 4 times [2022-01-31 09:05:43,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:43,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087708215] [2022-01-31 09:05:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:43,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:05:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 09:05:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:05:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 09:05:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:43,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:43,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087708215] [2022-01-31 09:05:43,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087708215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:43,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056731876] [2022-01-31 09:05:43,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:05:43,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:43,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:43,452 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) [2022-01-31 09:05:43,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:05:43,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:05:43,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 09:05:43,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:44,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:44,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056731876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:44,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:44,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-01-31 09:05:44,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905765718] [2022-01-31 09:05:44,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:44,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 09:05:44,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 09:05:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2022-01-31 09:05:44,367 INFO L87 Difference]: Start difference. First operand 428 states and 514 transitions. Second operand has 32 states, 32 states have (on average 3.25) internal successors, (104), 31 states have internal predecessors, (104), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:05:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:44,830 INFO L93 Difference]: Finished difference Result 597 states and 698 transitions. [2022-01-31 09:05:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 09:05:44,830 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 31 states have internal predecessors, (104), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 64 [2022-01-31 09:05:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:44,832 INFO L225 Difference]: With dead ends: 597 [2022-01-31 09:05:44,832 INFO L226 Difference]: Without dead ends: 442 [2022-01-31 09:05:44,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:05:44,833 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 288 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:44,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 113 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:05:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-31 09:05:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 430. [2022-01-31 09:05:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 363 states have (on average 1.1735537190082646) internal successors, (426), 381 states have internal predecessors, (426), 42 states have call successors, (42), 26 states have call predecessors, (42), 24 states have return successors, (41), 22 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 09:05:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 509 transitions. [2022-01-31 09:05:44,843 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 509 transitions. Word has length 64 [2022-01-31 09:05:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:44,843 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 509 transitions. [2022-01-31 09:05:44,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 31 states have internal predecessors, (104), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:05:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 509 transitions. [2022-01-31 09:05:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:05:44,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:44,845 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:44,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:45,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:05:45,068 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 427200700, now seen corresponding path program 5 times [2022-01-31 09:05:45,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:45,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22789292] [2022-01-31 09:05:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:45,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:45,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:45,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:05:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:45,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:05:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:45,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:05:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:05:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:05:45,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22789292] [2022-01-31 09:05:45,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22789292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:45,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135550040] [2022-01-31 09:05:45,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:05:45,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:45,368 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) [2022-01-31 09:05:45,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:05:45,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 09:05:45,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 09:05:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:45,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:05:45,563 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:45,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:45,578 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:45,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:45,597 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:45,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:45,612 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:05:45,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:05:45,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-31 09:05:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 38 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 09:05:45,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:50,275 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_103 Int)) (or (forall ((v_ArrVal_433 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) |c_main_~#volArray~0.offset| (* 16 v_main_~i~0_103)) v_ArrVal_433) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_103)))) is different from false [2022-01-31 09:05:50,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 23 [2022-01-31 09:05:50,287 INFO L387 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 200 treesize of output 192 [2022-01-31 09:05:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2022-01-31 09:05:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135550040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:50,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:50,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-01-31 09:05:50,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226717803] [2022-01-31 09:05:50,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:50,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 09:05:50,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 09:05:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=777, Unknown=2, NotChecked=58, Total=992 [2022-01-31 09:05:50,415 INFO L87 Difference]: Start difference. First operand 430 states and 509 transitions. Second operand has 32 states, 32 states have (on average 3.5625) internal successors, (114), 31 states have internal predecessors, (114), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:05:52,509 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~CCCELVOL1~0 1) c_main_~MINVAL~0) (forall ((v_main_~i~0_103 Int)) (or (forall ((v_ArrVal_433 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) |c_main_~#volArray~0.offset| (* 16 v_main_~i~0_103)) v_ArrVal_433) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_103)))) (= |c_main_~#volArray~0.offset| 0) (= (+ (- 1) c_main_~CCCELVOL1~0) 0) (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* c_main_~i~0 16) (- 4) |c_main_~#volArray~0.offset|)) 0) (= c_main_~i~0 1)) is different from false [2022-01-31 09:05:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:52,811 INFO L93 Difference]: Finished difference Result 465 states and 548 transitions. [2022-01-31 09:05:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 09:05:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5625) internal successors, (114), 31 states have internal predecessors, (114), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 70 [2022-01-31 09:05:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:52,813 INFO L225 Difference]: With dead ends: 465 [2022-01-31 09:05:52,813 INFO L226 Difference]: Without dead ends: 465 [2022-01-31 09:05:52,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=213, Invalid=1052, Unknown=3, NotChecked=138, Total=1406 [2022-01-31 09:05:52,814 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:52,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 239 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 563 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2022-01-31 09:05:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-31 09:05:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 456. [2022-01-31 09:05:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 384 states have (on average 1.1614583333333333) internal successors, (446), 402 states have internal predecessors, (446), 45 states have call successors, (45), 28 states have call predecessors, (45), 26 states have return successors, (44), 25 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-31 09:05:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 535 transitions. [2022-01-31 09:05:52,824 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 535 transitions. Word has length 70 [2022-01-31 09:05:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:52,824 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 535 transitions. [2022-01-31 09:05:52,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5625) internal successors, (114), 31 states have internal predecessors, (114), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:05:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 535 transitions. [2022-01-31 09:05:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:05:52,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:52,827 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:52,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:53,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:53,043 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -78357925, now seen corresponding path program 6 times [2022-01-31 09:05:53,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:53,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144423394] [2022-01-31 09:05:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:53,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:05:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:53,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:05:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:53,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:05:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:05:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:53,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144423394] [2022-01-31 09:05:53,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144423394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048406795] [2022-01-31 09:05:53,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:05:53,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:53,320 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) [2022-01-31 09:05:53,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:05:53,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 09:05:53,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:53,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 09:05:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:53,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:05:53,567 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:53,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:05:53,585 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:53,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:05:53,620 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:05:53,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:06:30,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-31 09:06:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:06:30,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:33,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 23 [2022-01-31 09:06:33,372 INFO L387 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 88 treesize of output 84 [2022-01-31 09:06:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:06:33,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048406795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:33,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:33,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 37 [2022-01-31 09:06:33,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845537244] [2022-01-31 09:06:33,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:33,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 09:06:33,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 09:06:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1174, Unknown=6, NotChecked=0, Total=1332 [2022-01-31 09:06:33,510 INFO L87 Difference]: Start difference. First operand 456 states and 535 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:06:48,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:48,016 INFO L93 Difference]: Finished difference Result 672 states and 800 transitions. [2022-01-31 09:06:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 09:06:48,017 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 70 [2022-01-31 09:06:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:48,019 INFO L225 Difference]: With dead ends: 672 [2022-01-31 09:06:48,019 INFO L226 Difference]: Without dead ends: 672 [2022-01-31 09:06:48,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 133 SyntacticMatches, 23 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=701, Invalid=5766, Unknown=13, NotChecked=0, Total=6480 [2022-01-31 09:06:48,022 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 266 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:48,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 468 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1241 Invalid, 0 Unknown, 472 Unchecked, 0.7s Time] [2022-01-31 09:06:48,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-31 09:06:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 548. [2022-01-31 09:06:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 457 states have (on average 1.1553610503282277) internal successors, (528), 478 states have internal predecessors, (528), 59 states have call successors, (59), 34 states have call predecessors, (59), 31 states have return successors, (58), 35 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-31 09:06:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 645 transitions. [2022-01-31 09:06:48,046 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 645 transitions. Word has length 70 [2022-01-31 09:06:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:48,046 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 645 transitions. [2022-01-31 09:06:48,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:06:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 645 transitions. [2022-01-31 09:06:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:06:48,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:48,048 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:48,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 09:06:48,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:48,261 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash 841377982, now seen corresponding path program 2 times [2022-01-31 09:06:48,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:48,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376866902] [2022-01-31 09:06:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:48,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:48,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:48,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:48,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:06:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:48,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:06:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:06:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:06:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:06:48,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:48,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376866902] [2022-01-31 09:06:48,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376866902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:48,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009092444] [2022-01-31 09:06:48,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:06:48,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:48,528 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) [2022-01-31 09:06:48,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:06:48,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:06:48,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:06:48,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:06:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:48,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:06:48,760 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:06:48,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:06:48,785 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:06:48,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:06:48,801 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:06:48,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:07:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:07:21,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:24,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:07:24,591 INFO L387 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 34 treesize of output 30 [2022-01-31 09:07:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:07:24,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009092444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:24,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:24,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 38 [2022-01-31 09:07:24,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721867581] [2022-01-31 09:07:24,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:24,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 09:07:24,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 09:07:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1249, Unknown=5, NotChecked=0, Total=1406 [2022-01-31 09:07:24,779 INFO L87 Difference]: Start difference. First operand 548 states and 645 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:07:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:34,959 INFO L93 Difference]: Finished difference Result 630 states and 741 transitions. [2022-01-31 09:07:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 09:07:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 70 [2022-01-31 09:07:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:34,966 INFO L225 Difference]: With dead ends: 630 [2022-01-31 09:07:34,966 INFO L226 Difference]: Without dead ends: 627 [2022-01-31 09:07:34,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 126 SyntacticMatches, 17 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=744, Invalid=5888, Unknown=10, NotChecked=0, Total=6642 [2022-01-31 09:07:34,968 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 211 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:34,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 451 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1277 Invalid, 0 Unknown, 376 Unchecked, 0.7s Time] [2022-01-31 09:07:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-31 09:07:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 520. [2022-01-31 09:07:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 433 states have (on average 1.1478060046189376) internal successors, (497), 451 states have internal predecessors, (497), 55 states have call successors, (55), 34 states have call predecessors, (55), 31 states have return successors, (54), 34 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 09:07:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 606 transitions. [2022-01-31 09:07:34,978 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 606 transitions. Word has length 70 [2022-01-31 09:07:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:34,979 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 606 transitions. [2022-01-31 09:07:34,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:07:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 606 transitions. [2022-01-31 09:07:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:07:34,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:34,980 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:35,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:07:35,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-31 09:07:35,196 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash 472606846, now seen corresponding path program 3 times [2022-01-31 09:07:35,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:35,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956541681] [2022-01-31 09:07:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:35,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:35,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:07:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:35,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:07:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:35,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:07:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:35,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:07:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:35,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:07:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:07:35,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956541681] [2022-01-31 09:07:35,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956541681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908939128] [2022-01-31 09:07:35,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:07:35,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:35,409 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) [2022-01-31 09:07:35,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:07:35,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 09:07:35,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:07:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 09:07:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:35,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:07:35,618 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:07:35,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:07:35,634 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:07:35,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:07:35,648 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:07:35,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:07:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:07:36,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:36,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 31 [2022-01-31 09:07:36,504 INFO L387 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 63 treesize of output 55 [2022-01-31 09:07:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:07:36,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908939128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:36,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:36,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 35 [2022-01-31 09:07:36,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864370829] [2022-01-31 09:07:36,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:36,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 09:07:36,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 09:07:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 09:07:36,556 INFO L87 Difference]: Start difference. First operand 520 states and 606 transitions. Second operand has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 33 states have internal predecessors, (113), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:08:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:08:26,234 INFO L93 Difference]: Finished difference Result 994 states and 1189 transitions. [2022-01-31 09:08:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 09:08:26,235 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 33 states have internal predecessors, (113), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 70 [2022-01-31 09:08:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:08:26,247 INFO L225 Difference]: With dead ends: 994 [2022-01-31 09:08:26,247 INFO L226 Difference]: Without dead ends: 994 [2022-01-31 09:08:26,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 137 SyntacticMatches, 17 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6061 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=1528, Invalid=14950, Unknown=34, NotChecked=0, Total=16512 [2022-01-31 09:08:26,251 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 442 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:08:26,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 614 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 1971 Invalid, 0 Unknown, 212 Unchecked, 1.3s Time] [2022-01-31 09:08:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-31 09:08:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 633. [2022-01-31 09:08:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 518 states have (on average 1.1428571428571428) internal successors, (592), 543 states have internal predecessors, (592), 79 states have call successors, (79), 38 states have call predecessors, (79), 35 states have return successors, (78), 51 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 09:08:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 749 transitions. [2022-01-31 09:08:26,266 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 749 transitions. Word has length 70 [2022-01-31 09:08:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:08:26,266 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 749 transitions. [2022-01-31 09:08:26,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 33 states have internal predecessors, (113), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:08:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 749 transitions. [2022-01-31 09:08:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 09:08:26,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:08:26,269 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:08:26,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 09:08:26,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:08:26,485 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:08:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:08:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1392595946, now seen corresponding path program 1 times [2022-01-31 09:08:26,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:08:26,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600656395] [2022-01-31 09:08:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:26,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:08:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:08:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:08:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:08:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 09:08:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 09:08:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-31 09:08:26,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:08:26,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600656395] [2022-01-31 09:08:26,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600656395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:08:26,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:08:26,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:08:26,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911883867] [2022-01-31 09:08:26,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:08:26,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:08:26,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:08:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:08:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:08:26,527 INFO L87 Difference]: Start difference. First operand 633 states and 749 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:08:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:08:26,580 INFO L93 Difference]: Finished difference Result 528 states and 608 transitions. [2022-01-31 09:08:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:08:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-01-31 09:08:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:08:26,582 INFO L225 Difference]: With dead ends: 528 [2022-01-31 09:08:26,582 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 09:08:26,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:08:26,583 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:08:26,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:08:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 09:08:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 435. [2022-01-31 09:08:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 353 states have (on average 1.1076487252124645) internal successors, (391), 369 states have internal predecessors, (391), 54 states have call successors, (54), 29 states have call predecessors, (54), 27 states have return successors, (53), 36 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 09:08:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 498 transitions. [2022-01-31 09:08:26,592 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 498 transitions. Word has length 73 [2022-01-31 09:08:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:08:26,593 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 498 transitions. [2022-01-31 09:08:26,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:08:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 498 transitions. [2022-01-31 09:08:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 09:08:26,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:08:26,594 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:08:26,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 09:08:26,594 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:08:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:08:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash 215322768, now seen corresponding path program 7 times [2022-01-31 09:08:26,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:08:26,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079542707] [2022-01-31 09:08:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:26,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:08:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:08:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:08:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:08:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:08:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:08:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:08:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:08:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:08:26,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:08:26,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079542707] [2022-01-31 09:08:26,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079542707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:08:26,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799134494] [2022-01-31 09:08:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:08:26,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:08:26,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:08:26,836 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) [2022-01-31 09:08:26,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:08:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 09:08:26,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:08:27,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:08:27,125 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:08:27,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:08:27,139 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:08:27,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:08:38,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-31 09:08:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:08:38,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:08:41,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:08:41,501 INFO L387 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 34 treesize of output 30 [2022-01-31 09:08:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:08:41,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799134494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:08:41,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:08:41,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 40 [2022-01-31 09:08:41,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019730003] [2022-01-31 09:08:41,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:08:41,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 09:08:41,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:08:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 09:08:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1428, Unknown=1, NotChecked=0, Total=1560 [2022-01-31 09:08:41,691 INFO L87 Difference]: Start difference. First operand 435 states and 498 transitions. Second operand has 40 states, 40 states have (on average 3.275) internal successors, (131), 39 states have internal predecessors, (131), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:08:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:08:52,654 INFO L93 Difference]: Finished difference Result 802 states and 933 transitions. [2022-01-31 09:08:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 09:08:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 39 states have internal predecessors, (131), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 79 [2022-01-31 09:08:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:08:52,657 INFO L225 Difference]: With dead ends: 802 [2022-01-31 09:08:52,657 INFO L226 Difference]: Without dead ends: 802 [2022-01-31 09:08:52,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 161 SyntacticMatches, 19 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8602 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=2261, Invalid=23172, Unknown=7, NotChecked=0, Total=25440 [2022-01-31 09:08:52,662 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 400 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 4115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:08:52,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 771 Invalid, 4115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2839 Invalid, 0 Unknown, 664 Unchecked, 1.5s Time] [2022-01-31 09:08:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-31 09:08:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 465. [2022-01-31 09:08:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 378 states have (on average 1.097883597883598) internal successors, (415), 391 states have internal predecessors, (415), 52 states have call successors, (52), 36 states have call predecessors, (52), 34 states have return successors, (51), 37 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 09:08:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 518 transitions. [2022-01-31 09:08:52,674 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 518 transitions. Word has length 79 [2022-01-31 09:08:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:08:52,675 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 518 transitions. [2022-01-31 09:08:52,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 39 states have internal predecessors, (131), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:08:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 518 transitions. [2022-01-31 09:08:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 09:08:52,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:08:52,676 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:08:52,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 09:08:52,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:08:52,896 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:08:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:08:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1667683531, now seen corresponding path program 1 times [2022-01-31 09:08:52,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:08:52,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428034778] [2022-01-31 09:08:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:52,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:08:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:08:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:08:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:08:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:08:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:08:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:08:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:08:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 09:08:54,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:08:54,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428034778] [2022-01-31 09:08:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428034778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:08:54,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007059202] [2022-01-31 09:08:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:54,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:08:54,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:08:54,279 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) [2022-01-31 09:08:54,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 09:08:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:54,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 09:08:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:08:54,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:08:54,488 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:08:54,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:08:54,498 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:08:54,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:08:54,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-31 09:08:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:08:54,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:08:55,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:08:55,085 INFO L387 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 34 treesize of output 30 [2022-01-31 09:08:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:08:55,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007059202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:08:55,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:08:55,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 36 [2022-01-31 09:08:55,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378794179] [2022-01-31 09:08:55,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:08:55,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:08:55,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:08:55,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:08:55,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:08:55,160 INFO L87 Difference]: Start difference. First operand 465 states and 518 transitions. Second operand has 36 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 15 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-01-31 09:09:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:08,246 INFO L93 Difference]: Finished difference Result 929 states and 1093 transitions. [2022-01-31 09:09:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-01-31 09:09:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 15 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 79 [2022-01-31 09:09:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:08,250 INFO L225 Difference]: With dead ends: 929 [2022-01-31 09:09:08,250 INFO L226 Difference]: Without dead ends: 929 [2022-01-31 09:09:08,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18947 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4162, Invalid=45790, Unknown=0, NotChecked=0, Total=49952 [2022-01-31 09:09:08,254 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 601 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 5001 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 6198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 5001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:08,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 728 Invalid, 6198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1197 Valid, 5001 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 09:09:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-01-31 09:09:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 528. [2022-01-31 09:09:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 428 states have (on average 1.102803738317757) internal successors, (472), 446 states have internal predecessors, (472), 65 states have call successors, (65), 36 states have call predecessors, (65), 34 states have return successors, (64), 45 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 09:09:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 601 transitions. [2022-01-31 09:09:08,267 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 601 transitions. Word has length 79 [2022-01-31 09:09:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:08,267 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 601 transitions. [2022-01-31 09:09:08,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 15 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-01-31 09:09:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 601 transitions. [2022-01-31 09:09:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 09:09:08,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:08,269 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:08,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 09:09:08,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 09:09:08,483 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash 79340012, now seen corresponding path program 2 times [2022-01-31 09:09:08,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:08,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186555860] [2022-01-31 09:09:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:08,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:09:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:09:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:09:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:09:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:09:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:09:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 73 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:09:08,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186555860] [2022-01-31 09:09:08,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186555860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008667308] [2022-01-31 09:09:08,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:09:08,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:08,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:08,680 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) [2022-01-31 09:09:08,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 09:09:08,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:09:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 09:09:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:08,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:09:08,837 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:09:08,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:09:08,849 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:09:08,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:09:59,322 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:09:59,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-01-31 09:09:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:09:59,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:01,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:10:01,488 INFO L387 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 30 treesize of output 26 [2022-01-31 09:10:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 73 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:10:01,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008667308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:10:01,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:10:01,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 24 [2022-01-31 09:10:01,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809656134] [2022-01-31 09:10:01,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:10:01,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:10:01,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:10:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:10:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=478, Unknown=6, NotChecked=0, Total=552 [2022-01-31 09:10:01,529 INFO L87 Difference]: Start difference. First operand 528 states and 601 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 21 states have internal predecessors, (86), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:10:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:10:14,928 INFO L93 Difference]: Finished difference Result 663 states and 745 transitions. [2022-01-31 09:10:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 09:10:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 21 states have internal predecessors, (86), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 79 [2022-01-31 09:10:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:10:14,930 INFO L225 Difference]: With dead ends: 663 [2022-01-31 09:10:14,930 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 09:10:14,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 149 SyntacticMatches, 18 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=245, Invalid=1997, Unknown=14, NotChecked=0, Total=2256 [2022-01-31 09:10:14,931 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 94 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:10:14,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 347 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1212 Invalid, 0 Unknown, 147 Unchecked, 0.5s Time] [2022-01-31 09:10:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 09:10:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 554. [2022-01-31 09:10:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 449 states have (on average 1.1046770601336302) internal successors, (496), 466 states have internal predecessors, (496), 67 states have call successors, (67), 39 states have call predecessors, (67), 37 states have return successors, (66), 48 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-31 09:10:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 629 transitions. [2022-01-31 09:10:14,942 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 629 transitions. Word has length 79 [2022-01-31 09:10:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:10:14,942 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 629 transitions. [2022-01-31 09:10:14,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 21 states have internal predecessors, (86), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:10:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 629 transitions. [2022-01-31 09:10:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 09:10:14,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:10:14,944 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:10:14,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-31 09:10:15,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 09:10:15,160 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:10:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:10:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1334059136, now seen corresponding path program 3 times [2022-01-31 09:10:15,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:10:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460543160] [2022-01-31 09:10:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:15,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:10:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:10:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:10:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:10:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:10:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:10:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 09:10:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 09:10:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:10:15,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:10:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460543160] [2022-01-31 09:10:15,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460543160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:10:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840593495] [2022-01-31 09:10:15,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:10:15,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:15,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:10:15,364 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) [2022-01-31 09:10:15,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 09:10:15,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:10:15,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:10:15,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 09:10:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:10:15,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:10:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:10:15,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:10:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:10:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:10:15,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:10:15,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-31 09:10:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:10:16,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:11:49,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 45 [2022-01-31 09:11:49,129 INFO L387 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 5884 treesize of output 5868 [2022-01-31 09:11:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 21 proven. 17 refuted. 3 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-31 09:11:54,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840593495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:11:54,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:11:54,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 13] total 36 [2022-01-31 09:11:54,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227000253] [2022-01-31 09:11:54,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:11:54,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:11:54,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:11:54,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:11:54,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1100, Unknown=37, NotChecked=0, Total=1260 [2022-01-31 09:11:54,214 INFO L87 Difference]: Start difference. First operand 554 states and 629 transitions. Second operand has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 34 states have internal predecessors, (116), 10 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 09:11:57,629 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 20 |c_main_~#volArray~0.offset|)) (.cse3 (* c_main_~i~0 16)) (.cse1 (select |c_#memory_int| |c_main_~#volArray~0.base|))) (and (forall ((v_main_~i~0_203 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_203)) (forall ((v_ArrVal_797 Int) (v_main_~i~0_202 Int) (v_ArrVal_795 Int) (v_ArrVal_787 Int)) (or (not (<= (+ v_main_~i~0_203 1) v_main_~i~0_202)) (<= (select (let ((.cse0 (* 16 v_main_~i~0_202))) (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 16) |c_main_~#volArray~0.offset| (* 16 v_main_~i~0_203)) v_ArrVal_787) (+ .cse0 (- 16) |c_main_~#volArray~0.offset|) v_ArrVal_795) (+ .cse0 (- 12) |c_main_~#volArray~0.offset|) v_ArrVal_797)) |c_main_~#volArray~0.offset|) c_main_~CCCELVOL3~0))))) (= (select .cse1 .cse2) 0) (<= 0 c_main_~CCCELVOL3~0) (= (select .cse1 (+ (* c_main_~i~0 4) 16 |c_main_~#volArray~0.offset|)) 0) (= |c_main_~#volArray~0.offset| 0) (not (= .cse2 (+ .cse3 (- 12) |c_main_~#volArray~0.offset|))) (= (+ (- 16) .cse3 |c_main_~#volArray~0.offset|) |c_main_~#volArray~0.offset|) (< 7 c_main_~MINVAL~0) (<= (select .cse1 |c_main_~#volArray~0.offset|) 0))) is different from false [2022-01-31 09:11:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:11:58,040 INFO L93 Difference]: Finished difference Result 735 states and 837 transitions. [2022-01-31 09:11:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 09:11:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 34 states have internal predecessors, (116), 10 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 85 [2022-01-31 09:11:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:11:58,043 INFO L225 Difference]: With dead ends: 735 [2022-01-31 09:11:58,043 INFO L226 Difference]: Without dead ends: 735 [2022-01-31 09:11:58,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 183 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 98.0s TimeCoverageRelationStatistics Valid=689, Invalid=5439, Unknown=38, NotChecked=154, Total=6320 [2022-01-31 09:11:58,045 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 176 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:11:58,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 586 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2011 Invalid, 0 Unknown, 330 Unchecked, 0.9s Time] [2022-01-31 09:11:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-31 09:11:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 624. [2022-01-31 09:11:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 497 states have (on average 1.1066398390342052) internal successors, (550), 523 states have internal predecessors, (550), 85 states have call successors, (85), 43 states have call predecessors, (85), 41 states have return successors, (84), 57 states have call predecessors, (84), 84 states have call successors, (84) [2022-01-31 09:11:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 719 transitions. [2022-01-31 09:11:58,056 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 719 transitions. Word has length 85 [2022-01-31 09:11:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:11:58,056 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 719 transitions. [2022-01-31 09:11:58,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 34 states have internal predecessors, (116), 10 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 09:11:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 719 transitions. [2022-01-31 09:11:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 09:11:58,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:11:58,058 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:11:58,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 09:11:58,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 09:11:58,284 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:11:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:11:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash -842141280, now seen corresponding path program 4 times [2022-01-31 09:11:58,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:11:58,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595867283] [2022-01-31 09:11:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:11:58,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:11:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:11:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:11:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:11:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:11:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:11:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 09:11:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 09:11:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:11:58,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:11:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595867283] [2022-01-31 09:11:58,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595867283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:11:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604472793] [2022-01-31 09:11:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:11:58,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:11:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:11:58,496 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) [2022-01-31 09:11:58,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 09:11:58,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:11:58,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:11:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 09:11:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:11:58,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:11:58,669 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:11:58,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:58,687 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:11:58,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:58,742 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:11:58,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:58,763 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:11:58,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:58,781 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:11:58,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:58,803 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:11:58,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:12:49,333 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:12:49,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-01-31 09:12:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:12:49,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:12:51,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:12:51,600 INFO L387 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 30 treesize of output 26 [2022-01-31 09:12:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:12:51,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604472793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:12:51,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:12:51,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 27 [2022-01-31 09:12:51,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651609090] [2022-01-31 09:12:51,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:12:51,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:12:51,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:12:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:12:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=602, Unknown=6, NotChecked=0, Total=702 [2022-01-31 09:12:51,641 INFO L87 Difference]: Start difference. First operand 624 states and 719 transitions. Second operand has 27 states, 26 states have (on average 3.730769230769231) internal successors, (97), 24 states have internal predecessors, (97), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:13:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:13:34,623 INFO L93 Difference]: Finished difference Result 831 states and 956 transitions. [2022-01-31 09:13:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 09:13:34,623 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.730769230769231) internal successors, (97), 24 states have internal predecessors, (97), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 85 [2022-01-31 09:13:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:13:34,626 INFO L225 Difference]: With dead ends: 831 [2022-01-31 09:13:34,626 INFO L226 Difference]: Without dead ends: 831 [2022-01-31 09:13:34,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 168 SyntacticMatches, 25 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 94.6s TimeCoverageRelationStatistics Valid=817, Invalid=7163, Unknown=30, NotChecked=0, Total=8010 [2022-01-31 09:13:34,628 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 221 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:13:34,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 440 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1906 Invalid, 0 Unknown, 190 Unchecked, 0.9s Time] [2022-01-31 09:13:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-31 09:13:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 698. [2022-01-31 09:13:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 552 states have (on average 1.1105072463768115) internal successors, (613), 584 states have internal predecessors, (613), 98 states have call successors, (98), 49 states have call predecessors, (98), 47 states have return successors, (97), 64 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 09:13:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 808 transitions. [2022-01-31 09:13:34,640 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 808 transitions. Word has length 85 [2022-01-31 09:13:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:13:34,640 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 808 transitions. [2022-01-31 09:13:34,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.730769230769231) internal successors, (97), 24 states have internal predecessors, (97), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:13:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 808 transitions. [2022-01-31 09:13:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 09:13:34,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:13:34,643 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:13:34,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 09:13:34,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:13:34,858 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:13:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:13:34,859 INFO L85 PathProgramCache]: Analyzing trace with hash 763725307, now seen corresponding path program 8 times [2022-01-31 09:13:34,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:13:34,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731121245] [2022-01-31 09:13:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:13:34,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:13:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:13:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:13:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:13:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:13:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:13:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:13:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:13:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:13:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:13:35,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:13:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731121245] [2022-01-31 09:13:35,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731121245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:13:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674964108] [2022-01-31 09:13:35,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:13:35,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:13:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:13:35,116 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) [2022-01-31 09:13:35,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 09:13:35,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:13:35,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:13:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 09:13:35,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:13:35,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:13:35,333 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:13:35,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:13:35,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-31 09:13:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:13:35,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:13:35,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:13:35,889 INFO L387 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 34 treesize of output 30 [2022-01-31 09:13:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:13:35,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674964108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:13:35,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:13:35,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 35 [2022-01-31 09:13:35,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977367800] [2022-01-31 09:13:35,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:13:35,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 09:13:35,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:13:35,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 09:13:35,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 09:13:35,966 INFO L87 Difference]: Start difference. First operand 698 states and 808 transitions. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 09:13:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:13:39,896 INFO L93 Difference]: Finished difference Result 967 states and 1132 transitions. [2022-01-31 09:13:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 09:13:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 88 [2022-01-31 09:13:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:13:39,900 INFO L225 Difference]: With dead ends: 967 [2022-01-31 09:13:39,900 INFO L226 Difference]: Without dead ends: 967 [2022-01-31 09:13:39,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3546 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1349, Invalid=11083, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 09:13:39,902 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 282 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 3537 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 4014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 3537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:13:39,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 649 Invalid, 4014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 3537 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 09:13:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-31 09:13:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 729. [2022-01-31 09:13:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 576 states have (on average 1.1076388888888888) internal successors, (638), 609 states have internal predecessors, (638), 105 states have call successors, (105), 49 states have call predecessors, (105), 47 states have return successors, (104), 70 states have call predecessors, (104), 104 states have call successors, (104) [2022-01-31 09:13:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 847 transitions. [2022-01-31 09:13:39,916 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 847 transitions. Word has length 88 [2022-01-31 09:13:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:13:39,916 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 847 transitions. [2022-01-31 09:13:39,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 09:13:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 847 transitions. [2022-01-31 09:13:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 09:13:39,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:13:39,919 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:13:39,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 09:13:40,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 09:13:40,139 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:13:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:13:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash -700419746, now seen corresponding path program 4 times [2022-01-31 09:13:40,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:13:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989019002] [2022-01-31 09:13:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:13:40,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:13:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:13:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:13:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:13:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:13:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:13:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:13:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:13:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:13:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:13:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 12 proven. 101 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:13:40,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:13:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989019002] [2022-01-31 09:13:40,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989019002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:13:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022982504] [2022-01-31 09:13:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:13:40,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:13:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:13:40,340 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) [2022-01-31 09:13:40,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 09:13:40,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:13:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:13:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 09:13:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:13:40,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:13:40,513 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:13:40,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:14:53,478 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:14:53,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-01-31 09:14:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 8 proven. 113 refuted. 12 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:14:53,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:14:57,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:14:57,656 INFO L387 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 30 treesize of output 26 [2022-01-31 09:14:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 12 proven. 101 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:14:57,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022982504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:14:57,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:14:57,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 27 [2022-01-31 09:14:57,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701711907] [2022-01-31 09:14:57,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:14:57,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:14:57,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:14:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:14:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=601, Unknown=15, NotChecked=0, Total=702 [2022-01-31 09:14:57,698 INFO L87 Difference]: Start difference. First operand 729 states and 847 transitions. Second operand has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 24 states have internal predecessors, (96), 14 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 09:15:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:15:47,162 INFO L93 Difference]: Finished difference Result 1116 states and 1315 transitions. [2022-01-31 09:15:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 09:15:47,162 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 24 states have internal predecessors, (96), 14 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 88 [2022-01-31 09:15:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:15:47,166 INFO L225 Difference]: With dead ends: 1116 [2022-01-31 09:15:47,166 INFO L226 Difference]: Without dead ends: 1116 [2022-01-31 09:15:47,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 195 SyntacticMatches, 20 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6999 ImplicationChecksByTransitivity, 124.7s TimeCoverageRelationStatistics Valid=1519, Invalid=17070, Unknown=43, NotChecked=0, Total=18632 [2022-01-31 09:15:47,169 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 256 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 3371 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 4044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 3371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:15:47,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 761 Invalid, 4044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 3371 Invalid, 0 Unknown, 257 Unchecked, 1.5s Time] [2022-01-31 09:15:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-01-31 09:15:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 773. [2022-01-31 09:15:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 609 states have (on average 1.1050903119868638) internal successors, (673), 643 states have internal predecessors, (673), 109 states have call successors, (109), 56 states have call predecessors, (109), 54 states have return successors, (108), 73 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 09:15:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 890 transitions. [2022-01-31 09:15:47,184 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 890 transitions. Word has length 88 [2022-01-31 09:15:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:15:47,184 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 890 transitions. [2022-01-31 09:15:47,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 24 states have internal predecessors, (96), 14 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 09:15:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 890 transitions. [2022-01-31 09:15:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 09:15:47,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:15:47,186 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:15:47,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 09:15:47,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:47,409 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:15:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:15:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1792443565, now seen corresponding path program 3 times [2022-01-31 09:15:47,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:15:47,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720881189] [2022-01-31 09:15:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:15:47,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:15:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:15:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:15:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:15:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:15:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:15:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:15:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:15:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:15:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 09:15:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 09:15:47,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:15:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720881189] [2022-01-31 09:15:47,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720881189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:15:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670450709] [2022-01-31 09:15:47,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:15:47,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:15:47,684 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) [2022-01-31 09:15:47,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 09:15:47,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 09:15:47,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:15:47,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:15:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:15:47,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:17:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 09:17:25,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:17:28,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-31 09:17:28,209 INFO L387 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 34 treesize of output 30 [2022-01-31 09:17:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 09:17:28,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670450709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:17:28,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:17:28,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 14] total 41 [2022-01-31 09:17:28,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612314867] [2022-01-31 09:17:28,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:17:28,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 09:17:28,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:17:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 09:17:28,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1481, Unknown=8, NotChecked=0, Total=1640 [2022-01-31 09:17:28,280 INFO L87 Difference]: Start difference. First operand 773 states and 890 transitions. Second operand has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 24 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-01-31 09:17:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:17:52,569 INFO L93 Difference]: Finished difference Result 1044 states and 1212 transitions. [2022-01-31 09:17:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 09:17:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 24 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 97 [2022-01-31 09:17:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:17:52,572 INFO L225 Difference]: With dead ends: 1044 [2022-01-31 09:17:52,572 INFO L226 Difference]: Without dead ends: 1044 [2022-01-31 09:17:52,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 185 SyntacticMatches, 19 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4009 ImplicationChecksByTransitivity, 123.0s TimeCoverageRelationStatistics Valid=1150, Invalid=11478, Unknown=28, NotChecked=0, Total=12656 [2022-01-31 09:17:52,573 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 315 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:17:52,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 696 Invalid, 2969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2420 Invalid, 0 Unknown, 167 Unchecked, 1.2s Time] [2022-01-31 09:17:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-31 09:17:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 835. [2022-01-31 09:17:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 655 states have (on average 1.1007633587786259) internal successors, (721), 692 states have internal predecessors, (721), 119 states have call successors, (119), 62 states have call predecessors, (119), 60 states have return successors, (118), 80 states have call predecessors, (118), 118 states have call successors, (118) [2022-01-31 09:17:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 958 transitions. [2022-01-31 09:17:52,589 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 958 transitions. Word has length 97 [2022-01-31 09:17:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:17:52,589 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 958 transitions. [2022-01-31 09:17:52,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 24 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-01-31 09:17:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 958 transitions. [2022-01-31 09:17:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 09:17:52,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:17:52,592 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:17:52,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 09:17:52,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:17:52,807 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:17:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:17:52,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1813910902, now seen corresponding path program 2 times [2022-01-31 09:17:52,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:17:52,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945072880] [2022-01-31 09:17:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:17:52,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:17:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:52,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:17:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:52,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:17:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:17:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:17:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:53,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:17:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:53,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:17:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:53,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:17:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:53,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:17:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:53,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 09:17:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 09:17:53,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:17:53,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945072880] [2022-01-31 09:17:53,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945072880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:17:53,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011557364] [2022-01-31 09:17:53,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:17:53,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:17:53,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:17:53,012 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) [2022-01-31 09:17:53,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 09:17:53,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:17:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:17:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 09:17:53,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:17:53,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12