/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/skipped.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:09:21,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:09:21,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:09:21,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:09:21,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:09:21,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:09:21,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:09:21,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:09:21,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:09:21,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:09:21,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:09:21,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:09:21,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:09:21,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:09:21,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:09:21,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:09:21,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:09:21,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:09:21,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:09:21,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:09:21,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:09:21,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:09:21,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:09:21,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:09:21,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:09:21,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:09:21,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:09:21,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:09:21,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:09:21,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:09:21,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:09:21,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:09:21,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:09:21,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:09:21,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:09:21,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:09:21,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:09:21,183 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:09:21,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:09:21,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:09:21,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:09:21,185 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:09:21,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:09:21,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:09:21,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:09:21,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:09:21,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:09:21,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:09:21,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:09:21,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:09:21,187 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:09:21,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:09:21,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:09:21,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:09:21,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:09:21,377 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:09:21,378 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:09:21,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skipped.c [2022-01-31 09:09:21,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/927dc18b1/2143665b3a424558ae105c2443c74a9e/FLAGcedf222d2 [2022-01-31 09:09:21,797 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:09:21,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skipped.c [2022-01-31 09:09:21,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/927dc18b1/2143665b3a424558ae105c2443c74a9e/FLAGcedf222d2 [2022-01-31 09:09:21,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/927dc18b1/2143665b3a424558ae105c2443c74a9e [2022-01-31 09:09:21,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:09:21,821 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:09:21,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:09:21,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:09:21,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:09:21,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:09:21" (1/1) ... [2022-01-31 09:09:21,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28dd9b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:21, skipping insertion in model container [2022-01-31 09:09:21,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:09:21" (1/1) ... [2022-01-31 09:09:21,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:09:21,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:09:21,993 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/skipped.c[398,411] [2022-01-31 09:09:22,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:09:22,025 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:09:22,034 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/skipped.c[398,411] [2022-01-31 09:09:22,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:09:22,055 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:09:22,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22 WrapperNode [2022-01-31 09:09:22,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:09:22,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:09:22,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:09:22,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:09:22,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:09:22,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:09:22,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:09:22,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:09:22,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:09:22,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:22,118 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 09:09:22,126 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 09:09:22,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:09:22,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:09:22,150 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:09:22,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:09:22,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:09:22,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:09:22,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:09:22,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:09:22,151 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:09:22,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:09:22,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:09:22,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:09:22,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:09:22,152 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 09:09:22,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:09:22,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 09:09:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:09:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:09:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:09:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:09:22,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:09:22,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:09:22,204 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:09:22,205 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:09:22,369 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:09:22,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:09:22,373 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 09:09:22,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:09:22 BoogieIcfgContainer [2022-01-31 09:09:22,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:09:22,375 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:09:22,375 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:09:22,381 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:09:22,383 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:09:22" (1/1) ... [2022-01-31 09:09:22,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:09:22 BasicIcfg [2022-01-31 09:09:22,403 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:09:22,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:09:22,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:09:22,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:09:22,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:09:21" (1/4) ... [2022-01-31 09:09:22,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15155d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:09:22, skipping insertion in model container [2022-01-31 09:09:22,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:22" (2/4) ... [2022-01-31 09:09:22,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15155d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:09:22, skipping insertion in model container [2022-01-31 09:09:22,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:09:22" (3/4) ... [2022-01-31 09:09:22,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15155d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:09:22, skipping insertion in model container [2022-01-31 09:09:22,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:09:22" (4/4) ... [2022-01-31 09:09:22,407 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.cJordan [2022-01-31 09:09:22,410 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:09:22,410 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:09:22,450 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:09:22,455 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 09:09:22,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:09:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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 09:09:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:09:22,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:22,467 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 09:09:22,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash 32431096, now seen corresponding path program 1 times [2022-01-31 09:09:22,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:22,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22539952] [2022-01-31 09:09:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:22,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:22,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:22,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 09:09:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:22,630 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 09:09:22,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:22,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22539952] [2022-01-31 09:09:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22539952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:09:22,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:09:22,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:09:22,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189498893] [2022-01-31 09:09:22,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:09:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:09:22,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:09:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:09:22,657 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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), 2 states have call successors, (2) [2022-01-31 09:09:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:22,750 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-01-31 09:09:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:09:22,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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), 2 states have call successors, (2) Word has length 22 [2022-01-31 09:09:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:22,758 INFO L225 Difference]: With dead ends: 39 [2022-01-31 09:09:22,759 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 09:09:22,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 09:09:22,764 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:22,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:09:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 09:09:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-31 09:09:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 09:09:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 09:09:22,785 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2022-01-31 09:09:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:22,786 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 09:09:22,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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), 2 states have call successors, (2) [2022-01-31 09:09:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 09:09:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 09:09:22,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:22,787 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] [2022-01-31 09:09:22,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:09:22,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1868386474, now seen corresponding path program 1 times [2022-01-31 09:09:22,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:22,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158737723] [2022-01-31 09:09:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:22,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:22,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 09:09:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:22,854 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 09:09:22,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158737723] [2022-01-31 09:09:22,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158737723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838844291] [2022-01-31 09:09:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:22,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:22,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:22,856 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 09:09:22,857 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 09:09:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:09:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:23,048 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 09:09:23,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:23,123 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 09:09:23,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838844291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:23,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:23,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:09:23,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687948128] [2022-01-31 09:09:23,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:23,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:09:23,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:09:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:09:23,126 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:09:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:23,202 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-31 09:09:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:09:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-31 09:09:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:23,206 INFO L225 Difference]: With dead ends: 36 [2022-01-31 09:09:23,206 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 09:09:23,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:09:23,208 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:23,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:09:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 09:09:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 09:09:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 09:09:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 09:09:23,214 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2022-01-31 09:09:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:23,214 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 09:09:23,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:09:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 09:09:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:09:23,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:23,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:23,238 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 09:09:23,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:23,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:23,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1092112974, now seen corresponding path program 2 times [2022-01-31 09:09:23,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:23,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524123553] [2022-01-31 09:09:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:23,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:23,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 09:09:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:23,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524123553] [2022-01-31 09:09:23,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524123553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:09:23,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:09:23,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:09:23,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273399829] [2022-01-31 09:09:23,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:09:23,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:09:23,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:09:23,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:09:23,611 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 09:09:23,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:23,680 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-01-31 09:09:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:09:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 26 [2022-01-31 09:09:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:23,682 INFO L225 Difference]: With dead ends: 40 [2022-01-31 09:09:23,683 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 09:09:23,683 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 09:09:23,685 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:23,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:09:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 09:09:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-01-31 09:09:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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 09:09:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 09:09:23,699 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2022-01-31 09:09:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:23,700 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 09:09:23,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 09:09:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 09:09:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 09:09:23,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:23,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:23,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:09:23,703 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1780047350, now seen corresponding path program 1 times [2022-01-31 09:09:23,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915810784] [2022-01-31 09:09:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:23,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:23,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 09:09:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:23,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915810784] [2022-01-31 09:09:23,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915810784] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460584590] [2022-01-31 09:09:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:23,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:23,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:23,892 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 09:09:23,893 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 09:09:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:23,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:09:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:24,011 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 09:09:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:09:24,069 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 09:09:24,103 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 09:09:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:24,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:24,211 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 09:09:24,218 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 28 treesize of output 26 [2022-01-31 09:09:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:24,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460584590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:24,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:24,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 18 [2022-01-31 09:09:24,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515415198] [2022-01-31 09:09:24,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:24,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:09:24,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:09:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:09:24,272 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 18 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:09:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:24,509 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2022-01-31 09:09:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:09:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-31 09:09:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:24,511 INFO L225 Difference]: With dead ends: 67 [2022-01-31 09:09:24,512 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:09:24,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:09:24,513 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 140 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:09:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:09:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2022-01-31 09:09:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 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 09:09:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-31 09:09:24,519 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2022-01-31 09:09:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:24,519 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-31 09:09:24,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:09:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-31 09:09:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 09:09:24,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:24,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:24,539 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 09:09:24,739 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,SelfDestructingSolverStorable3 [2022-01-31 09:09:24,740 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash -16904009, now seen corresponding path program 1 times [2022-01-31 09:09:24,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:24,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006198267] [2022-01-31 09:09:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:24,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:24,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:24,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 09:09:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:24,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:24,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006198267] [2022-01-31 09:09:24,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006198267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:24,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198285171] [2022-01-31 09:09:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:24,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:24,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:24,908 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 09:09:24,909 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 09:09:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:24,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:09:24,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:25,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:09:25,034 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 09:09:25,071 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 09:09:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:25,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:25,205 INFO L353 Elim1Store]: treesize reduction 8, result has 38.5 percent of original size [2022-01-31 09:09:25,206 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 24 treesize of output 16 [2022-01-31 09:09:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:25,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198285171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:25,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:25,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 20 [2022-01-31 09:09:25,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186866575] [2022-01-31 09:09:25,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:25,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:09:25,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:09:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:09:25,256 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:09:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:25,480 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-01-31 09:09:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:09:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-31 09:09:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:25,483 INFO L225 Difference]: With dead ends: 69 [2022-01-31 09:09:25,483 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 09:09:25,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:09:25,484 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 147 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:09:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 09:09:25,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-01-31 09:09:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 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 09:09:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-31 09:09:25,487 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2022-01-31 09:09:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:25,488 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-31 09:09:25,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:09:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-31 09:09:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 09:09:25,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:25,489 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, 1, 1, 1, 1, 1] [2022-01-31 09:09:25,509 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 09:09:25,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:25,707 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash 238719497, now seen corresponding path program 1 times [2022-01-31 09:09:25,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:25,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493842667] [2022-01-31 09:09:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:25,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:25,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:25,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 09:09:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:25,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:09:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:09:25,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:25,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493842667] [2022-01-31 09:09:25,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493842667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:25,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456110478] [2022-01-31 09:09:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:25,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:25,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:25,870 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 09:09:25,919 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 09:09:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:09:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:26,008 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 09:09:28,164 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:09:28,165 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 21 treesize of output 10 [2022-01-31 09:09:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:28,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:28,459 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 09:09:28,468 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 09:09:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:28,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456110478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:28,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:28,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 18 [2022-01-31 09:09:28,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27924958] [2022-01-31 09:09:28,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:28,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:09:28,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:09:28,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=254, Unknown=1, NotChecked=0, Total=306 [2022-01-31 09:09:28,526 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 09:09:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:28,739 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2022-01-31 09:09:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:09:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2022-01-31 09:09:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:28,741 INFO L225 Difference]: With dead ends: 80 [2022-01-31 09:09:28,741 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 09:09:28,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=82, Invalid=423, Unknown=1, NotChecked=0, Total=506 [2022-01-31 09:09:28,742 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:28,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 164 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 414 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-31 09:09:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 09:09:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2022-01-31 09:09:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:09:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-01-31 09:09:28,746 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 39 [2022-01-31 09:09:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:28,746 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-01-31 09:09:28,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 09:09:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-01-31 09:09:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 09:09:28,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:28,747 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, 1, 1, 1, 1, 1] [2022-01-31 09:09:28,775 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 09:09:28,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:28,947 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1592029194, now seen corresponding path program 1 times [2022-01-31 09:09:28,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:28,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878508505] [2022-01-31 09:09:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:28,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:29,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 09:09:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:09:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:09:29,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878508505] [2022-01-31 09:09:29,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878508505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053458209] [2022-01-31 09:09:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:29,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:29,092 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 09:09:29,103 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 09:09:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:09:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:31,279 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:09:31,279 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 25 treesize of output 14 [2022-01-31 09:09:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:09:31,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:33,389 INFO L353 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-01-31 09:09:33,389 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 26 treesize of output 16 [2022-01-31 09:09:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:33,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053458209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:33,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:33,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 19 [2022-01-31 09:09:33,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677293834] [2022-01-31 09:09:33,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:33,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:09:33,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:09:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=287, Unknown=2, NotChecked=0, Total=342 [2022-01-31 09:09:33,426 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 19 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 09:09:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:33,644 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-01-31 09:09:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:09:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2022-01-31 09:09:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:33,645 INFO L225 Difference]: With dead ends: 78 [2022-01-31 09:09:33,645 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 09:09:33,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=85, Invalid=465, Unknown=2, NotChecked=0, Total=552 [2022-01-31 09:09:33,646 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 69 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:33,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 159 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 392 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-31 09:09:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 09:09:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2022-01-31 09:09:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:09:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-31 09:09:33,649 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2022-01-31 09:09:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:33,650 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-31 09:09:33,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 09:09:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-31 09:09:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 09:09:33,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:33,650 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-01-31 09:09:33,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 09:09:33,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:33,860 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash -386137316, now seen corresponding path program 2 times [2022-01-31 09:09:33,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:33,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352791236] [2022-01-31 09:09:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:33,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:33,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:33,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 09:09:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:33,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:09:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:33,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 09:09:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:09:33,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:33,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352791236] [2022-01-31 09:09:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352791236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:33,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584651689] [2022-01-31 09:09:33,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:09:33,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:33,934 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 09:09:33,935 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 09:09:33,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:09:33,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:09:33,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:09:34,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:09:34,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584651689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:34,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:34,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 09:09:34,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579870896] [2022-01-31 09:09:34,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:34,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:09:34,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:09:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:09:34,198 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 09:09:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:34,381 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-01-31 09:09:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:09:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2022-01-31 09:09:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:34,382 INFO L225 Difference]: With dead ends: 100 [2022-01-31 09:09:34,382 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 09:09:34,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:09:34,383 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 81 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:34,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 61 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:09:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 09:09:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-01-31 09:09:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:09:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-01-31 09:09:34,386 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 47 [2022-01-31 09:09:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:34,386 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-01-31 09:09:34,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 09:09:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-01-31 09:09:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 09:09:34,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:34,387 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 09:09:34,403 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 09:09:34,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:34,588 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash 176725312, now seen corresponding path program 3 times [2022-01-31 09:09:34,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:34,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010293876] [2022-01-31 09:09:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:34,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:34,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:34,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 09:09:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:34,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 09:09:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:34,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:09:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:34,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010293876] [2022-01-31 09:09:34,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010293876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69656556] [2022-01-31 09:09:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:09:34,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:34,757 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 09:09:34,758 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 09:09:34,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:09:34,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:34,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 09:09:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:09:35,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:09:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69656556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:35,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:35,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-01-31 09:09:35,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240558163] [2022-01-31 09:09:35,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:35,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 09:09:35,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 09:09:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:09:35,306 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 states have internal predecessors, (79), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:09:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:35,756 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-01-31 09:09:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:09:35,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 states have internal predecessors, (79), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-01-31 09:09:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:35,757 INFO L225 Difference]: With dead ends: 67 [2022-01-31 09:09:35,757 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:09:35,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:09:35,758 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 204 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:35,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 70 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:09:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:09:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-01-31 09:09:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:09:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-31 09:09:35,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 49 [2022-01-31 09:09:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:35,762 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-31 09:09:35,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 states have internal predecessors, (79), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:09:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-31 09:09:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 09:09:35,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:35,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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] [2022-01-31 09:09:35,781 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 09:09:35,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:35,981 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2146435508, now seen corresponding path program 4 times [2022-01-31 09:09:35,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546544774] [2022-01-31 09:09:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:35,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:36,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:36,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 09:09:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:09:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:36,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:09:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:36,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546544774] [2022-01-31 09:09:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546544774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191180159] [2022-01-31 09:09:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:09:36,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:36,224 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 09:09:36,255 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 09:09:36,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:09:36,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:36,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 09:09:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:09:36,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:36,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191180159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:36,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:36,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2022-01-31 09:09:36,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547245643] [2022-01-31 09:09:36,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:09:36,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:09:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:09:36,742 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 26 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:09:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:37,071 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-01-31 09:09:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:09:37,072 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2022-01-31 09:09:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:37,072 INFO L225 Difference]: With dead ends: 80 [2022-01-31 09:09:37,072 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:09:37,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:09:37,073 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 105 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:37,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 58 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:09:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:09:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-01-31 09:09:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:09:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-01-31 09:09:37,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 54 [2022-01-31 09:09:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:37,077 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-01-31 09:09:37,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:09:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-01-31 09:09:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:09:37,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:37,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 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] [2022-01-31 09:09:37,095 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 09:09:37,294 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,SelfDestructingSolverStorable9 [2022-01-31 09:09:37,295 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -645105904, now seen corresponding path program 5 times [2022-01-31 09:09:37,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:37,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901696786] [2022-01-31 09:09:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:37,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:37,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:37,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 09:09:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:09:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:37,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:09:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:09:37,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901696786] [2022-01-31 09:09:37,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901696786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141677067] [2022-01-31 09:09:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:09:37,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:37,869 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 09:09:37,870 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 09:09:37,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 09:09:37,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 09:09:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:38,014 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 09:09:38,059 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:09:38,060 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 09:09:43,428 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:09:43,428 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 28 treesize of output 14 [2022-01-31 09:09:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 09:09:43,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:47,966 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 09:09:47,969 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 09:09:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 09:09:48,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141677067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:48,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:48,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 11] total 35 [2022-01-31 09:09:48,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373866622] [2022-01-31 09:09:48,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:48,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 09:09:48,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 09:09:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1072, Unknown=5, NotChecked=0, Total=1190 [2022-01-31 09:09:48,038 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 35 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:10:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:10:00,704 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2022-01-31 09:10:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 09:10:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2022-01-31 09:10:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:10:00,709 INFO L225 Difference]: With dead ends: 304 [2022-01-31 09:10:00,710 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 09:10:00,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 111 SyntacticMatches, 12 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=894, Invalid=7105, Unknown=11, NotChecked=0, Total=8010 [2022-01-31 09:10:00,712 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 424 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:10:00,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 265 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1560 Invalid, 0 Unknown, 222 Unchecked, 0.8s Time] [2022-01-31 09:10:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 09:10:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 96. [2022-01-31 09:10:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 80 states have (on average 1.225) internal successors, (98), 81 states have internal predecessors, (98), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:10:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2022-01-31 09:10:00,734 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 56 [2022-01-31 09:10:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:10:00,734 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2022-01-31 09:10:00,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:10:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2022-01-31 09:10:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:10:00,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:10:00,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 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] [2022-01-31 09:10:00,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:10:00,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:00,938 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:10:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:10:00,939 INFO L85 PathProgramCache]: Analyzing trace with hash 316508113, now seen corresponding path program 1 times [2022-01-31 09:10:00,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:10:00,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508558280] [2022-01-31 09:10:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:00,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:10:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:01,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:10:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 09:10:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:01,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:10:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:01,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:10:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:10:01,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:10:01,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508558280] [2022-01-31 09:10:01,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508558280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:10:01,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317574005] [2022-01-31 09:10:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:01,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:10:01,625 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 09:10:01,640 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 09:10:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 09:10:01,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:10:01,825 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:10:01,825 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 09:10:06,853 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:10:06,853 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 28 treesize of output 14 [2022-01-31 09:10:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 09:10:06,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:13,097 INFO L353 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-01-31 09:10:13,097 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 26 treesize of output 16 [2022-01-31 09:10:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 09:10:13,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317574005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:10:13,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:10:13,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 12] total 39 [2022-01-31 09:10:13,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864234791] [2022-01-31 09:10:13,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:10:13,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 09:10:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:10:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 09:10:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1334, Unknown=5, NotChecked=0, Total=1482 [2022-01-31 09:10:13,141 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 39 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:10:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:10:16,352 INFO L93 Difference]: Finished difference Result 185 states and 225 transitions. [2022-01-31 09:10:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 09:10:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2022-01-31 09:10:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:10:16,354 INFO L225 Difference]: With dead ends: 185 [2022-01-31 09:10:16,354 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 09:10:16,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 106 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=522, Invalid=3762, Unknown=6, NotChecked=0, Total=4290 [2022-01-31 09:10:16,356 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 219 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:10:16,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 219 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1069 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-01-31 09:10:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 09:10:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 106. [2022-01-31 09:10:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.206896551724138) internal successors, (105), 89 states have internal predecessors, (105), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:10:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-01-31 09:10:16,366 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 56 [2022-01-31 09:10:16,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:10:16,366 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-01-31 09:10:16,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:10:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-01-31 09:10:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 09:10:16,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:10:16,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 09:10:16,388 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 09:10:16,577 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,SelfDestructingSolverStorable11 [2022-01-31 09:10:16,578 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:10:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:10:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash 410513699, now seen corresponding path program 6 times [2022-01-31 09:10:16,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:10:16,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443140825] [2022-01-31 09:10:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:16,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:10:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:17,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:10:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:17,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 09:10:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:17,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:10:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:17,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:10:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:17,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 09:10:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:10:17,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:10:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443140825] [2022-01-31 09:10:17,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443140825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:10:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104108678] [2022-01-31 09:10:17,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:10:17,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:10:17,107 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 09:10:17,110 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 09:10:17,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 09:10:17,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:10:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 09:10:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:10:17,267 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 09:10:17,546 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:10:17,546 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 21 treesize of output 10 [2022-01-31 09:10:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 09:10:17,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:25,735 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 09:10:25,738 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 09:10:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 09:10:25,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104108678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:10:25,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:10:25,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 12] total 36 [2022-01-31 09:10:25,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709051077] [2022-01-31 09:10:25,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:10:25,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:10:25,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:10:25,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:10:25,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1129, Unknown=4, NotChecked=0, Total=1260 [2022-01-31 09:10:25,803 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:10:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:10:31,167 INFO L93 Difference]: Finished difference Result 306 states and 380 transitions. [2022-01-31 09:10:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 09:10:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 64 [2022-01-31 09:10:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:10:31,170 INFO L225 Difference]: With dead ends: 306 [2022-01-31 09:10:31,170 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 09:10:31,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=501, Invalid=4049, Unknown=6, NotChecked=0, Total=4556 [2022-01-31 09:10:31,172 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 248 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:10:31,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 322 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1426 Invalid, 0 Unknown, 115 Unchecked, 0.6s Time] [2022-01-31 09:10:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 09:10:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 155. [2022-01-31 09:10:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 133 states have internal predecessors, (158), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:10:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2022-01-31 09:10:31,180 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 64 [2022-01-31 09:10:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:10:31,180 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2022-01-31 09:10:31,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:10:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2022-01-31 09:10:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 09:10:31,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:10:31,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-01-31 09:10:31,199 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 09:10:31,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 09:10:31,382 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:10:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:10:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1773163228, now seen corresponding path program 1 times [2022-01-31 09:10:31,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:10:31,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65073241] [2022-01-31 09:10:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:31,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:10:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:31,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:10:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 09:10:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:31,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:10:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:31,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:10:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:31,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 09:10:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:10:31,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:10:31,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65073241] [2022-01-31 09:10:31,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65073241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:10:31,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123200127] [2022-01-31 09:10:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:31,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:10:31,950 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 09:10:31,951 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 09:10:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 09:10:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:10:32,424 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:10:32,424 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 21 treesize of output 10 [2022-01-31 09:10:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:10:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:40,650 INFO L353 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-01-31 09:10:40,651 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 26 treesize of output 16 [2022-01-31 09:10:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 09:10:40,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123200127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:10:40,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:10:40,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 13] total 40 [2022-01-31 09:10:40,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430648420] [2022-01-31 09:10:40,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:10:40,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 09:10:40,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:10:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 09:10:40,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1403, Unknown=4, NotChecked=0, Total=1560 [2022-01-31 09:10:40,720 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 36 states have internal predecessors, (100), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:10:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:10:48,192 INFO L93 Difference]: Finished difference Result 351 states and 444 transitions. [2022-01-31 09:10:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 09:10:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 36 states have internal predecessors, (100), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 64 [2022-01-31 09:10:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:10:48,196 INFO L225 Difference]: With dead ends: 351 [2022-01-31 09:10:48,196 INFO L226 Difference]: Without dead ends: 351 [2022-01-31 09:10:48,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=573, Invalid=4970, Unknown=7, NotChecked=0, Total=5550 [2022-01-31 09:10:48,198 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 207 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:10:48,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 293 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1584 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-01-31 09:10:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-31 09:10:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 164. [2022-01-31 09:10:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 135 states have (on average 1.1851851851851851) internal successors, (160), 139 states have internal predecessors, (160), 16 states have call successors, (16), 13 states have call predecessors, (16), 12 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 09:10:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2022-01-31 09:10:48,205 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 64 [2022-01-31 09:10:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:10:48,205 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2022-01-31 09:10:48,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 36 states have internal predecessors, (100), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:10:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2022-01-31 09:10:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 09:10:48,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:10:48,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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 09:10:48,229 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 09:10:48,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:10:48,423 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:10:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:10:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash -631396298, now seen corresponding path program 7 times [2022-01-31 09:10:48,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:10:48,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001448473] [2022-01-31 09:10:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:48,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:10:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:10:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 09:10:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:10:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:10:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 09:10:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 09:10:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:10:48,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:10:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001448473] [2022-01-31 09:10:48,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001448473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:10:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726954398] [2022-01-31 09:10:48,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:10:48,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:48,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:10:48,541 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 09:10:48,542 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 09:10:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:48,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:10:48,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:10:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:10:48,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:10:48,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726954398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:10:48,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:10:48,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:10:48,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488471798] [2022-01-31 09:10:48,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:10:48,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:10:48,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:10:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:10:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:10:48,958 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:10:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:10:49,249 INFO L93 Difference]: Finished difference Result 298 states and 352 transitions. [2022-01-31 09:10:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:10:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 72 [2022-01-31 09:10:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:10:49,251 INFO L225 Difference]: With dead ends: 298 [2022-01-31 09:10:49,251 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 09:10:49,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-01-31 09:10:49,252 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:10:49,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 120 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:10:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 09:10:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 138. [2022-01-31 09:10:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 115 states have internal predecessors, (130), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 09:10:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2022-01-31 09:10:49,255 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 72 [2022-01-31 09:10:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:10:49,256 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2022-01-31 09:10:49,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:10:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2022-01-31 09:10:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 09:10:49,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:10:49,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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 09:10:49,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 09:10:49,475 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,SelfDestructingSolverStorable14 [2022-01-31 09:10:49,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:10:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:10:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1289879186, now seen corresponding path program 8 times [2022-01-31 09:10:49,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:10:49,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617061580] [2022-01-31 09:10:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:49,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:10:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:10:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 09:10:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:49,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:10:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:49,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:10:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:49,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:10:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:49,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 09:10:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 09:10:49,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:10:49,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617061580] [2022-01-31 09:10:49,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617061580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:10:49,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973286469] [2022-01-31 09:10:49,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:10:49,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:10:49,692 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 09:10:49,693 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 09:10:49,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:10:49,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:10:49,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:10:49,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:10:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:10:50,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:10:50,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973286469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:10:50,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:10:50,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-01-31 09:10:50,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334791373] [2022-01-31 09:10:50,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:10:50,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 09:10:50,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:10:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 09:10:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:10:50,516 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand has 34 states, 34 states have (on average 3.235294117647059) internal successors, (110), 33 states have internal predecessors, (110), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:10:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:10:51,139 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2022-01-31 09:10:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 09:10:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.235294117647059) internal successors, (110), 33 states have internal predecessors, (110), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 74 [2022-01-31 09:10:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:10:51,147 INFO L225 Difference]: With dead ends: 164 [2022-01-31 09:10:51,147 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 09:10:51,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 09:10:51,148 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 259 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:10:51,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 97 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:10:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 09:10:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 146. [2022-01-31 09:10:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 123 states have internal predecessors, (138), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 09:10:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2022-01-31 09:10:51,154 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 74 [2022-01-31 09:10:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:10:51,155 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2022-01-31 09:10:51,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.235294117647059) internal successors, (110), 33 states have internal predecessors, (110), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:10:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2022-01-31 09:10:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 09:10:51,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:10:51,157 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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 09:10:51,177 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 09:10:51,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:51,366 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:10:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:10:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash -541845970, now seen corresponding path program 9 times [2022-01-31 09:10:51,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:10:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373888909] [2022-01-31 09:10:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:10:51,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:10:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:10:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:51,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 09:10:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:51,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:10:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:51,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 09:10:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:51,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:10:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:51,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 09:10:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:10:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 09:10:51,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:10:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373888909] [2022-01-31 09:10:51,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373888909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:10:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722965723] [2022-01-31 09:10:51,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:10:51,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:10:51,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:10:51,617 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 09:10:51,618 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 09:10:51,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 09:10:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:10:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:10:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:10:51,853 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 09:10:51,881 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:10:51,881 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 09:10:52,187 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:10:52,187 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 21 treesize of output 10 [2022-01-31 09:10:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:10:52,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:11:02,443 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 09:11:02,445 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 09:11:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:11:02,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722965723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:11:02,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:11:02,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2022-01-31 09:11:02,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577628144] [2022-01-31 09:11:02,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:11:02,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 09:11:02,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:11:02,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 09:11:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1012, Unknown=5, NotChecked=0, Total=1122 [2022-01-31 09:11:02,521 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 34 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:11:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:11:36,560 INFO L93 Difference]: Finished difference Result 949 states and 1284 transitions. [2022-01-31 09:11:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 09:11:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 79 [2022-01-31 09:11:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:11:36,563 INFO L225 Difference]: With dead ends: 949 [2022-01-31 09:11:36,563 INFO L226 Difference]: Without dead ends: 922 [2022-01-31 09:11:36,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 156 SyntacticMatches, 14 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=892, Invalid=7825, Unknown=25, NotChecked=0, Total=8742 [2022-01-31 09:11:36,566 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 555 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:11:36,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 391 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 2279 Invalid, 0 Unknown, 214 Unchecked, 1.0s Time] [2022-01-31 09:11:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-31 09:11:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 276. [2022-01-31 09:11:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 232 states have (on average 1.2543103448275863) internal successors, (291), 240 states have internal predecessors, (291), 25 states have call successors, (25), 19 states have call predecessors, (25), 18 states have return successors, (24), 16 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 09:11:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 340 transitions. [2022-01-31 09:11:36,574 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 340 transitions. Word has length 79 [2022-01-31 09:11:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:11:36,587 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 340 transitions. [2022-01-31 09:11:36,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 13 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:11:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 340 transitions. [2022-01-31 09:11:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 09:11:36,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:11:36,588 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:11:36,613 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 09:11:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 09:11:36,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:11:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:11:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 804294419, now seen corresponding path program 2 times [2022-01-31 09:11:36,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:11:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963035099] [2022-01-31 09:11:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:11:36,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:11:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:37,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:11:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:37,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 09:11:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:37,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:11:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:37,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 09:11:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:37,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 09:11:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 09:11:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 86 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:11:37,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:11:37,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963035099] [2022-01-31 09:11:37,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963035099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:11:37,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181601540] [2022-01-31 09:11:37,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:11:37,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:11:37,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:11:37,648 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 09:11:37,649 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 09:11:37,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:11:37,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:11:37,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 09:11:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:11:37,928 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:11:37,929 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 09:12:05,354 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:12:05,355 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 28 treesize of output 14 [2022-01-31 09:12:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 09:12:05,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:12:05,566 INFO L353 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-01-31 09:12:05,567 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 26 treesize of output 16 [2022-01-31 09:12:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:12:05,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181601540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:12:05,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:12:05,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 15] total 41 [2022-01-31 09:12:05,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757992224] [2022-01-31 09:12:05,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:12:05,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 09:12:05,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:12:05,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 09:12:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1493, Unknown=4, NotChecked=0, Total=1640 [2022-01-31 09:12:05,636 INFO L87 Difference]: Start difference. First operand 276 states and 340 transitions. Second operand has 41 states, 39 states have (on average 2.923076923076923) internal successors, (114), 38 states have internal predecessors, (114), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 09:12:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:12:17,049 INFO L93 Difference]: Finished difference Result 827 states and 1112 transitions. [2022-01-31 09:12:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 09:12:17,049 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.923076923076923) internal successors, (114), 38 states have internal predecessors, (114), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 81 [2022-01-31 09:12:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:12:17,051 INFO L225 Difference]: With dead ends: 827 [2022-01-31 09:12:17,051 INFO L226 Difference]: Without dead ends: 827 [2022-01-31 09:12:17,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 168 SyntacticMatches, 15 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=734, Invalid=6738, Unknown=10, NotChecked=0, Total=7482 [2022-01-31 09:12:17,053 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 632 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:12:17,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 357 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2068 Invalid, 0 Unknown, 212 Unchecked, 1.0s Time] [2022-01-31 09:12:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-31 09:12:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 251. [2022-01-31 09:12:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 208 states have (on average 1.2211538461538463) internal successors, (254), 214 states have internal predecessors, (254), 23 states have call successors, (23), 20 states have call predecessors, (23), 19 states have return successors, (22), 16 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:12:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 299 transitions. [2022-01-31 09:12:17,060 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 299 transitions. Word has length 81 [2022-01-31 09:12:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:12:17,060 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 299 transitions. [2022-01-31 09:12:17,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.923076923076923) internal successors, (114), 38 states have internal predecessors, (114), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 09:12:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 299 transitions. [2022-01-31 09:12:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 09:12:17,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:12:17,061 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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 09:12:17,080 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 09:12:17,277 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,SelfDestructingSolverStorable17 [2022-01-31 09:12:17,278 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:12:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:12:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1366935451, now seen corresponding path program 10 times [2022-01-31 09:12:17,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:12:17,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747301400] [2022-01-31 09:12:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:12:17,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:12:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:12:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 09:12:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:12:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 09:12:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 09:12:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 09:12:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:12:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:12:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 104 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:12:17,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:12:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747301400] [2022-01-31 09:12:17,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747301400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:12:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309835399] [2022-01-31 09:12:17,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:12:17,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:12:17,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:12:17,872 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 09:12:17,873 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 09:12:17,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:12:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:12:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:12:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:12:18,033 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 09:13:05,156 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:13:05,159 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 21 treesize of output 10 [2022-01-31 09:13:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-31 09:13:05,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:13:07,347 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 09:13:07,350 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 09:13:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-31 09:13:07,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309835399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:13:07,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:13:07,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 15] total 40 [2022-01-31 09:13:07,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284834149] [2022-01-31 09:13:07,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:13:07,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 09:13:07,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:13:07,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 09:13:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1423, Unknown=6, NotChecked=0, Total=1560 [2022-01-31 09:13:07,427 INFO L87 Difference]: Start difference. First operand 251 states and 299 transitions. Second operand has 40 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 37 states have internal predecessors, (107), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 09:14:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:14:13,774 INFO L93 Difference]: Finished difference Result 1481 states and 2011 transitions. [2022-01-31 09:14:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 09:14:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 37 states have internal predecessors, (107), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 89 [2022-01-31 09:14:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:14:13,779 INFO L225 Difference]: With dead ends: 1481 [2022-01-31 09:14:13,780 INFO L226 Difference]: Without dead ends: 1481 [2022-01-31 09:14:13,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 175 SyntacticMatches, 21 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5992 ImplicationChecksByTransitivity, 114.3s TimeCoverageRelationStatistics Valid=1455, Invalid=15004, Unknown=53, NotChecked=0, Total=16512 [2022-01-31 09:14:13,784 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 724 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 3023 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 3825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:14:13,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 524 Invalid, 3825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3023 Invalid, 0 Unknown, 265 Unchecked, 1.4s Time] [2022-01-31 09:14:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-01-31 09:14:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 497. [2022-01-31 09:14:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 421 states have (on average 1.2802850356294537) internal successors, (539), 433 states have internal predecessors, (539), 41 states have call successors, (41), 35 states have call predecessors, (41), 34 states have return successors, (40), 28 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 09:14:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 620 transitions. [2022-01-31 09:14:13,797 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 620 transitions. Word has length 89 [2022-01-31 09:14:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:14:13,797 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 620 transitions. [2022-01-31 09:14:13,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 37 states have internal predecessors, (107), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 09:14:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 620 transitions. [2022-01-31 09:14:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 09:14:13,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:14:13,799 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:14:13,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 09:14:14,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:14:14,016 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:14:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:14:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1374694810, now seen corresponding path program 2 times [2022-01-31 09:14:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:14:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034168414] [2022-01-31 09:14:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:14:14,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:14:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:14:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 09:14:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:14:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 09:14:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 09:14:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 09:14:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:14:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 104 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:14:14,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:14:14,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034168414] [2022-01-31 09:14:14,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034168414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:14:14,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463313379] [2022-01-31 09:14:14,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:14:14,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:14:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:14:14,718 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 09:14:14,719 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 09:14:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:14:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:14:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 09:14:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:15:02,541 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:15:02,541 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 21 treesize of output 10 [2022-01-31 09:15:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-31 09:15:02,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:15:04,758 INFO L353 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-01-31 09:15:04,758 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 26 treesize of output 16 [2022-01-31 09:15:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-31 09:15:04,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463313379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:15:04,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:15:04,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 16] total 45 [2022-01-31 09:15:04,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101490772] [2022-01-31 09:15:04,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:15:04,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 09:15:04,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:15:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 09:15:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1816, Unknown=6, NotChecked=0, Total=1980 [2022-01-31 09:15:04,835 INFO L87 Difference]: Start difference. First operand 497 states and 620 transitions. Second operand has 45 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 42 states have internal predecessors, (120), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 09:15:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:15:24,678 INFO L93 Difference]: Finished difference Result 1673 states and 2282 transitions. [2022-01-31 09:15:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 09:15:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 42 states have internal predecessors, (120), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 89 [2022-01-31 09:15:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:15:24,681 INFO L225 Difference]: With dead ends: 1673 [2022-01-31 09:15:24,681 INFO L226 Difference]: Without dead ends: 1673 [2022-01-31 09:15:24,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5553 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=1625, Invalid=15389, Unknown=16, NotChecked=0, Total=17030 [2022-01-31 09:15:24,683 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1114 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:15:24,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 371 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 2121 Invalid, 0 Unknown, 191 Unchecked, 1.2s Time] [2022-01-31 09:15:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-01-31 09:15:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 259. [2022-01-31 09:15:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 214 states have (on average 1.2149532710280373) internal successors, (260), 220 states have internal predecessors, (260), 24 states have call successors, (24), 21 states have call predecessors, (24), 20 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 09:15:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 307 transitions. [2022-01-31 09:15:24,693 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 307 transitions. Word has length 89 [2022-01-31 09:15:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:15:24,694 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 307 transitions. [2022-01-31 09:15:24,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 42 states have internal predecessors, (120), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 09:15:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 307 transitions. [2022-01-31 09:15:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 09:15:24,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:15:24,695 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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 09:15:24,711 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 09:15:24,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:24,911 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:15:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:15:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1227256456, now seen corresponding path program 11 times [2022-01-31 09:15:24,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:15:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609640887] [2022-01-31 09:15:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:15:24,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:15:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:15:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 09:15:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 09:15:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 09:15:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 09:15:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 09:15:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:15:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 09:15:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-31 09:15:25,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:15:25,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609640887] [2022-01-31 09:15:25,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609640887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:15:25,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941977944] [2022-01-31 09:15:25,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:15:25,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:25,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:15:25,050 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 09:15:25,053 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 09:15:25,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 09:15:25,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:15:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:15:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:15:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-31 09:15:25,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:15:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-31 09:15:25,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941977944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:15:25,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:15:25,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:15:25,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54689784] [2022-01-31 09:15:25,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:15:25,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:15:25,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:15:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:15:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:15:25,622 INFO L87 Difference]: Start difference. First operand 259 states and 307 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 16 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-01-31 09:15:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:15:26,010 INFO L93 Difference]: Finished difference Result 590 states and 713 transitions. [2022-01-31 09:15:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 09:15:26,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 16 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 97 [2022-01-31 09:15:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:15:26,012 INFO L225 Difference]: With dead ends: 590 [2022-01-31 09:15:26,012 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 09:15:26,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 09:15:26,013 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 260 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:15:26,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 109 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:15:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 09:15:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 261. [2022-01-31 09:15:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 216 states have (on average 1.212962962962963) internal successors, (262), 222 states have internal predecessors, (262), 24 states have call successors, (24), 21 states have call predecessors, (24), 20 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 09:15:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 309 transitions. [2022-01-31 09:15:26,017 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 309 transitions. Word has length 97 [2022-01-31 09:15:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:15:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 309 transitions. [2022-01-31 09:15:26,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 16 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-01-31 09:15:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 309 transitions. [2022-01-31 09:15:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 09:15:26,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:15:26,019 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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 09:15:26,036 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 09:15:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:26,235 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:15:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:15:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 215733916, now seen corresponding path program 12 times [2022-01-31 09:15:26,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:15:26,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006044432] [2022-01-31 09:15:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:15:26,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:15:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:15:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:15:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 09:15:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 09:15:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 09:15:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 09:15:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 09:15:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 09:15:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 09:15:26,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:15:26,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006044432] [2022-01-31 09:15:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006044432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:15:26,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250647625] [2022-01-31 09:15:26,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:15:26,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:26,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:15:26,519 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 09:15:26,520 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 09:15:26,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 09:15:26,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:15:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:15:26,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:15:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 84 proven. 18 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-31 09:15:27,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:15:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 84 proven. 18 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-31 09:15:27,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250647625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:15:27,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:15:27,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-01-31 09:15:27,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090884436] [2022-01-31 09:15:27,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:15:27,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 09:15:27,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:15:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 09:15:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 09:15:27,838 INFO L87 Difference]: Start difference. First operand 261 states and 309 transitions. Second operand has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 42 states have internal predecessors, (141), 17 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 09:15:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:15:28,736 INFO L93 Difference]: Finished difference Result 341 states and 419 transitions. [2022-01-31 09:15:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:15:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 42 states have internal predecessors, (141), 17 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 99 [2022-01-31 09:15:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:15:28,739 INFO L225 Difference]: With dead ends: 341 [2022-01-31 09:15:28,739 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 09:15:28,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=638, Invalid=3268, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 09:15:28,740 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 435 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:15:28,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 113 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:15:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 09:15:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 279. [2022-01-31 09:15:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 234 states have (on average 1.1965811965811965) internal successors, (280), 240 states have internal predecessors, (280), 24 states have call successors, (24), 21 states have call predecessors, (24), 20 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 09:15:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 327 transitions. [2022-01-31 09:15:28,744 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 327 transitions. Word has length 99 [2022-01-31 09:15:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:15:28,744 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 327 transitions. [2022-01-31 09:15:28,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 42 states have internal predecessors, (141), 17 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 09:15:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 327 transitions. [2022-01-31 09:15:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 09:15:28,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:15:28,745 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:15:28,765 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 09:15:28,959 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,SelfDestructingSolverStorable21 [2022-01-31 09:15:28,959 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:15:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:15:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1198427888, now seen corresponding path program 13 times [2022-01-31 09:15:28,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:15:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925219374] [2022-01-31 09:15:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:15:28,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:15:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:15:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:15:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 09:15:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 09:15:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:15:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 09:15:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 09:15:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 09:15:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 35 proven. 60 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 09:15:29,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:15:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925219374] [2022-01-31 09:15:29,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925219374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:15:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824234160] [2022-01-31 09:15:29,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:15:29,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:15:29,321 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 09:15:29,337 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 09:15:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:15:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:15:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:15:29,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:15:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 46 proven. 49 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 09:15:30,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824234160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:15:30,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:15:30,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2022-01-31 09:15:30,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501895229] [2022-01-31 09:15:30,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:15:30,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 09:15:30,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:15:30,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 09:15:30,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 09:15:30,294 INFO L87 Difference]: Start difference. First operand 279 states and 327 transitions. Second operand has 44 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:15:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:15:30,816 INFO L93 Difference]: Finished difference Result 346 states and 401 transitions. [2022-01-31 09:15:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 09:15:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 104 [2022-01-31 09:15:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:15:30,824 INFO L225 Difference]: With dead ends: 346 [2022-01-31 09:15:30,824 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 09:15:30,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=618, Invalid=2244, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 09:15:30,831 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 315 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:15:30,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 72 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:15:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 09:15:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 281. [2022-01-31 09:15:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 236 states have (on average 1.194915254237288) internal successors, (282), 242 states have internal predecessors, (282), 24 states have call successors, (24), 21 states have call predecessors, (24), 20 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 09:15:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 329 transitions. [2022-01-31 09:15:30,836 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 329 transitions. Word has length 104 [2022-01-31 09:15:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:15:30,836 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 329 transitions. [2022-01-31 09:15:30,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:15:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 329 transitions. [2022-01-31 09:15:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 09:15:30,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:15:30,837 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:15:30,854 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 09:15:31,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 09:15:31,054 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:15:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:15:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1554150732, now seen corresponding path program 14 times [2022-01-31 09:15:31,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:15:31,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881120061] [2022-01-31 09:15:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:15:31,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:15:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:15:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:15:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:15:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 09:15:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 09:15:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 09:15:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 09:15:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 09:15:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:15:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 170 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:15:31,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:15:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881120061] [2022-01-31 09:15:31,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881120061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:15:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008136917] [2022-01-31 09:15:31,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:15:31,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:15:31,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:15:31,866 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 09:15:31,867 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 09:15:31,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:15:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:15:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:15:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:15:32,092 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 09:15:32,130 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:15:32,131 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 09:16:35,060 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:16:35,061 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 21 treesize of output 10 [2022-01-31 09:16:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 09:16:35,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:16:37,296 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 09:16:37,298 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 09:16:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 106 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 09:16:37,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008136917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:16:37,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:16:37,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 17] total 45 [2022-01-31 09:16:37,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516932560] [2022-01-31 09:16:37,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:16:37,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 09:16:37,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:16:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 09:16:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1823, Unknown=7, NotChecked=0, Total=1980 [2022-01-31 09:16:37,433 INFO L87 Difference]: Start difference. First operand 281 states and 329 transitions. Second operand has 45 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 42 states have internal predecessors, (130), 16 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 09:20:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:20:32,347 INFO L93 Difference]: Finished difference Result 3487 states and 4865 transitions. [2022-01-31 09:20:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-01-31 09:20:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 42 states have internal predecessors, (130), 16 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 106 [2022-01-31 09:20:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:20:32,355 INFO L225 Difference]: With dead ends: 3487 [2022-01-31 09:20:32,355 INFO L226 Difference]: Without dead ends: 3487 [2022-01-31 09:20:32,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 251 SyntacticMatches, 22 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40672 ImplicationChecksByTransitivity, 297.5s TimeCoverageRelationStatistics Valid=5697, Invalid=94328, Unknown=147, NotChecked=0, Total=100172 [2022-01-31 09:20:32,361 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 3223 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 4329 mSolverCounterSat, 2643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3224 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 7546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2643 IncrementalHoareTripleChecker+Valid, 4329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:20:32,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3224 Valid, 922 Invalid, 7546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2643 Valid, 4329 Invalid, 0 Unknown, 574 Unchecked, 2.6s Time] [2022-01-31 09:20:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-01-31 09:20:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 443. [2022-01-31 09:20:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 365 states have (on average 1.1917808219178083) internal successors, (435), 377 states have internal predecessors, (435), 42 states have call successors, (42), 36 states have call predecessors, (42), 35 states have return successors, (41), 29 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 09:20:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 518 transitions. [2022-01-31 09:20:32,380 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 518 transitions. Word has length 106 [2022-01-31 09:20:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:20:32,380 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 518 transitions. [2022-01-31 09:20:32,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 42 states have internal predecessors, (130), 16 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 09:20:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 518 transitions. [2022-01-31 09:20:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 09:20:32,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:20:32,382 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:20:32,417 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 09:20:32,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:20:32,599 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:20:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:20:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1834500621, now seen corresponding path program 3 times [2022-01-31 09:20:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:20:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44766785] [2022-01-31 09:20:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:20:32,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:20:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:20:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:20:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:20:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 09:20:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 09:20:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 09:20:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 09:20:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 09:20:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 170 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:20:33,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:20:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44766785] [2022-01-31 09:20:33,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44766785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:20:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455411323] [2022-01-31 09:20:33,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:20:33,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:20:33,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:20:33,740 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 09:20:33,741 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 09:20:34,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 09:20:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:20:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 09:20:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:20:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:20:34,335 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 09:20:35,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:20:35,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:20:35,124 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 17 treesize of output 10 [2022-01-31 09:20:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 09:20:35,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:20:35,394 INFO L353 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-01-31 09:20:35,394 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 26 treesize of output 16 [2022-01-31 09:20:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 106 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 09:20:35,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455411323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:20:35,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:20:35,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20, 18] total 55 [2022-01-31 09:20:35,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368476610] [2022-01-31 09:20:35,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:20:35,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 09:20:35,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:20:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 09:20:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 09:20:35,557 INFO L87 Difference]: Start difference. First operand 443 states and 518 transitions. Second operand has 55 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 09:20:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:20:43,424 INFO L93 Difference]: Finished difference Result 3467 states and 4847 transitions. [2022-01-31 09:20:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 09:20:43,424 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 106 [2022-01-31 09:20:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:20:43,432 INFO L225 Difference]: With dead ends: 3467 [2022-01-31 09:20:43,432 INFO L226 Difference]: Without dead ends: 3467 [2022-01-31 09:20:43,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 261 SyntacticMatches, 14 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14341 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3136, Invalid=39094, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 09:20:43,434 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 3191 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 4109 mSolverCounterSat, 2196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3191 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 6640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2196 IncrementalHoareTripleChecker+Valid, 4109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:20:43,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3191 Valid, 684 Invalid, 6640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2196 Valid, 4109 Invalid, 0 Unknown, 335 Unchecked, 2.3s Time] [2022-01-31 09:20:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2022-01-31 09:20:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 459. [2022-01-31 09:20:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 377 states have (on average 1.1856763925729443) internal successors, (447), 389 states have internal predecessors, (447), 45 states have call successors, (45), 37 states have call predecessors, (45), 36 states have return successors, (44), 32 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-31 09:20:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 536 transitions. [2022-01-31 09:20:43,456 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 536 transitions. Word has length 106 [2022-01-31 09:20:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:20:43,456 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 536 transitions. [2022-01-31 09:20:43,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 09:20:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 536 transitions. [2022-01-31 09:20:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 09:20:43,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:20:43,458 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:20:43,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 09:20:43,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:20:43,671 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:20:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:20:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1555690335, now seen corresponding path program 15 times [2022-01-31 09:20:43,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:20:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654288870] [2022-01-31 09:20:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:20:43,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:20:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:20:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:20:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:20:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 09:20:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 09:20:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 09:20:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 09:20:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 09:20:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 09:20:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:20:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 09:20:44,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:20:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654288870] [2022-01-31 09:20:44,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654288870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:20:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339345056] [2022-01-31 09:20:44,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:20:44,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:20:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:20:44,508 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:20:44,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 09:20:44,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 09:20:44,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:20:44,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:20:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:20:44,924 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 09:22:07,714 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 09:22:07,714 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 21 treesize of output 10 [2022-01-31 09:22:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-01-31 09:22:07,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:09,932 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 09:22:09,934 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 09:22:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 14 proven. 132 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-01-31 09:22:10,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339345056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:10,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:22:10,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19, 18] total 48 [2022-01-31 09:22:10,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25922278] [2022-01-31 09:22:10,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:10,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 09:22:10,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 09:22:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2086, Unknown=8, NotChecked=0, Total=2256 [2022-01-31 09:22:10,088 INFO L87 Difference]: Start difference. First operand 459 states and 536 transitions. Second operand has 48 states, 46 states have (on average 2.891304347826087) internal successors, (133), 45 states have internal predecessors, (133), 18 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18)