/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-examples/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:23:43,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:23:43,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:23:43,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:23:43,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:23:43,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:23:43,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:23:43,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:23:43,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:23:43,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:23:43,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:23:43,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:23:43,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:23:43,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:23:43,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:23:43,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:23:43,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:23:43,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:23:43,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:23:43,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:23:43,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:23:43,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:23:43,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:23:43,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:23:43,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:23:43,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 07:23:43,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 07:23:43,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 07:23:43,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 07:23:43,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 07:23:43,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 07:23:43,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 07:23:43,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 07:23:43,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:23:43,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:23:43,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:23:43,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:23:43,175 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:23:43,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:23:43,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:23:43,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:23:43,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:23:43,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:23:43,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:23:43,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:23:43,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:23:43,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:43,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:23:43,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:23:43,178 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:23:43,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:23:43,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:23:43,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:23:43,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:23:43,384 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:23:43,384 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:23:43,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2022-01-31 07:23:43,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0465a6382/a9fe7f0948ef4cd1befe16ad76250d84/FLAGff8ecbd32 [2022-01-31 07:23:43,786 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:23:43,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2022-01-31 07:23:43,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0465a6382/a9fe7f0948ef4cd1befe16ad76250d84/FLAGff8ecbd32 [2022-01-31 07:23:43,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0465a6382/a9fe7f0948ef4cd1befe16ad76250d84 [2022-01-31 07:23:43,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:23:43,806 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:23:43,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:43,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:23:43,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:23:43,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:43,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5872da81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43, skipping insertion in model container [2022-01-31 07:23:43,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:43,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:23:43,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:23:43,917 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-examples/sorting_selectionsort_ground-2.i[823,836] [2022-01-31 07:23:43,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:43,944 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:23:43,955 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i[823,836] [2022-01-31 07:23:43,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:43,980 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:23:43,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43 WrapperNode [2022-01-31 07:23:43,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:43,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:23:43,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:23:43,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:23:43,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:43,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:44,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:44,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:44,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:44,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:44,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:44,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:23:44,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:23:44,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:23:44,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:23:44,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (1/1) ... [2022-01-31 07:23:44,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:44,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:44,050 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 07:23:44,072 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 07:23:44,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:23:44,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:23:44,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:23:44,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:23:44,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:23:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:23:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:23:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:23:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:23:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:23:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:23:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:23:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:23:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:23:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:23:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:23:44,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:23:44,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:23:44,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:23:44,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:23:44,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:23:44,155 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:23:44,156 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:23:44,265 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:23:44,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:23:44,269 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-31 07:23:44,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:44 BoogieIcfgContainer [2022-01-31 07:23:44,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:23:44,271 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:23:44,271 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:23:44,272 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:23:44,274 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:44" (1/1) ... [2022-01-31 07:23:44,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:44 BasicIcfg [2022-01-31 07:23:44,287 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:23:44,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:23:44,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:23:44,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:23:44,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:23:43" (1/4) ... [2022-01-31 07:23:44,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff181f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:44, skipping insertion in model container [2022-01-31 07:23:44,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:43" (2/4) ... [2022-01-31 07:23:44,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff181f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:44, skipping insertion in model container [2022-01-31 07:23:44,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:44" (3/4) ... [2022-01-31 07:23:44,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff181f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:44, skipping insertion in model container [2022-01-31 07:23:44,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:44" (4/4) ... [2022-01-31 07:23:44,292 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.iJordan [2022-01-31 07:23:44,295 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:23:44,296 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:23:44,338 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:23:44,345 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 07:23:44,345 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:23:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:44,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:44,361 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash -855374569, now seen corresponding path program 1 times [2022-01-31 07:23:44,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275823835] [2022-01-31 07:23:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,537 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 07:23:44,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275823835] [2022-01-31 07:23:44,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275823835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:44,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:44,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:23:44,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676692006] [2022-01-31 07:23:44,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:44,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:44,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:44,571 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,615 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-01-31 07:23:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:23:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,626 INFO L225 Difference]: With dead ends: 45 [2022-01-31 07:23:44,627 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 07:23:44,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:44,631 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 07:23:44,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 07:23:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-01-31 07:23:44,672 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2022-01-31 07:23:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-01-31 07:23:44,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-01-31 07:23:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:44,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:44,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:23:44,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,677 INFO L85 PathProgramCache]: Analyzing trace with hash 690922261, now seen corresponding path program 1 times [2022-01-31 07:23:44,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585410241] [2022-01-31 07:23:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,750 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 07:23:44,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585410241] [2022-01-31 07:23:44,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585410241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:44,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:44,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:44,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058364193] [2022-01-31 07:23:44,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:44,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:44,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:44,754 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,845 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-01-31 07:23:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:23:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,847 INFO L225 Difference]: With dead ends: 42 [2022-01-31 07:23:44,848 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 07:23:44,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:44,852 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 07:23:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 07:23:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-01-31 07:23:44,857 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2022-01-31 07:23:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,857 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-01-31 07:23:44,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-01-31 07:23:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 07:23:44,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:44,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:23:44,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1333887575, now seen corresponding path program 1 times [2022-01-31 07:23:44,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554384611] [2022-01-31 07:23:44,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,904 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 07:23:44,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554384611] [2022-01-31 07:23:44,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554384611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:44,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663242650] [2022-01-31 07:23:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:44,906 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 07:23:44,907 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 07:23:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:23:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:44,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663242650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:44,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:44,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:23:44,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854953339] [2022-01-31 07:23:44,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:44,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:44,987 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:45,011 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2022-01-31 07:23:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 07:23:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:45,012 INFO L225 Difference]: With dead ends: 59 [2022-01-31 07:23:45,012 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 07:23:45,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:45,013 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 24 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:45,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 78 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 07:23:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-01-31 07:23:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-31 07:23:45,018 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2022-01-31 07:23:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:45,018 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-31 07:23:45,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-31 07:23:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 07:23:45,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:45,019 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] [2022-01-31 07:23:45,042 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 07:23:45,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,242 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash 874351277, now seen corresponding path program 1 times [2022-01-31 07:23:45,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385723199] [2022-01-31 07:23:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,305 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 07:23:45,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385723199] [2022-01-31 07:23:45,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385723199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458947148] [2022-01-31 07:23:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:45,309 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 07:23:45,310 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 07:23:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:45,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:45,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458947148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:45,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:45,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:23:45,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900592512] [2022-01-31 07:23:45,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:45,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:45,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:45,395 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:45,418 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-01-31 07:23:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:45,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 07:23:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:45,419 INFO L225 Difference]: With dead ends: 59 [2022-01-31 07:23:45,419 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 07:23:45,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:45,420 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:45,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 81 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 07:23:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2022-01-31 07:23:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-01-31 07:23:45,424 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2022-01-31 07:23:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:45,424 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-01-31 07:23:45,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-01-31 07:23:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 07:23:45,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:45,425 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] [2022-01-31 07:23:45,446 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 07:23:45,635 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 07:23:45,636 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1677805684, now seen corresponding path program 1 times [2022-01-31 07:23:45,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105331325] [2022-01-31 07:23:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,676 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 07:23:45,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105331325] [2022-01-31 07:23:45,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105331325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652481150] [2022-01-31 07:23:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:45,677 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 07:23:45,678 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 07:23:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:45,771 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 07:23:45,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:45,825 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 07:23:45,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652481150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:45,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:45,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:23:45,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958621098] [2022-01-31 07:23:45,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:45,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:45,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:23:45,826 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:45,932 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-01-31 07:23:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:45,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 07:23:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:45,933 INFO L225 Difference]: With dead ends: 52 [2022-01-31 07:23:45,933 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 07:23:45,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:45,935 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:45,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 63 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 07:23:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 07:23:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-01-31 07:23:45,949 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 20 [2022-01-31 07:23:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:45,950 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-01-31 07:23:45,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-01-31 07:23:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 07:23:45,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:45,951 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:45,973 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 07:23:46,167 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 07:23:46,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash -270563118, now seen corresponding path program 2 times [2022-01-31 07:23:46,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:46,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136458551] [2022-01-31 07:23:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:46,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:46,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136458551] [2022-01-31 07:23:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136458551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:46,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:46,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:46,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535249233] [2022-01-31 07:23:46,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:46,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:46,237 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:46,330 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2022-01-31 07:23:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:46,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 07:23:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:46,333 INFO L225 Difference]: With dead ends: 77 [2022-01-31 07:23:46,333 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 07:23:46,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:46,336 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:46,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 42 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 07:23:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-01-31 07:23:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-01-31 07:23:46,345 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 26 [2022-01-31 07:23:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:46,345 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-01-31 07:23:46,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-01-31 07:23:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 07:23:46,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:46,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:46,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 07:23:46,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1771777191, now seen corresponding path program 1 times [2022-01-31 07:23:46,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:46,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757361971] [2022-01-31 07:23:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:23:46,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757361971] [2022-01-31 07:23:46,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757361971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:46,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:46,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:46,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145017731] [2022-01-31 07:23:46,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:46,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:46,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:46,405 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:46,487 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2022-01-31 07:23:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 07:23:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:46,491 INFO L225 Difference]: With dead ends: 73 [2022-01-31 07:23:46,492 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 07:23:46,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:46,495 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:46,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 47 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 07:23:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-01-31 07:23:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2022-01-31 07:23:46,498 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 29 [2022-01-31 07:23:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:46,498 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2022-01-31 07:23:46,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2022-01-31 07:23:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 07:23:46,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:46,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 07:23:46,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 07:23:46,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:46,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1884219428, now seen corresponding path program 1 times [2022-01-31 07:23:46,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:46,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150265270] [2022-01-31 07:23:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:46,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:46,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150265270] [2022-01-31 07:23:46,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150265270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:46,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926462592] [2022-01-31 07:23:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:46,557 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 07:23:46,559 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 07:23:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:23:46,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:46,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:46,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926462592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:46,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:46,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 07:23:46,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830794261] [2022-01-31 07:23:46,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 07:23:46,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 07:23:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:23:46,751 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:46,904 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2022-01-31 07:23:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 07:23:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 07:23:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:46,905 INFO L225 Difference]: With dead ends: 77 [2022-01-31 07:23:46,905 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 07:23:46,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 07:23:46,906 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:46,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 58 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 07:23:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 07:23:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-01-31 07:23:46,909 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 30 [2022-01-31 07:23:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:46,909 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-01-31 07:23:46,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-01-31 07:23:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 07:23:46,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:46,910 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 07:23:46,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 07:23:47,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:47,118 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1218121448, now seen corresponding path program 2 times [2022-01-31 07:23:47,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:47,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491095442] [2022-01-31 07:23:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:47,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:47,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:47,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491095442] [2022-01-31 07:23:47,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491095442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:47,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883593832] [2022-01-31 07:23:47,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:47,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:47,212 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 07:23:47,213 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 07:23:47,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 07:23:47,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:47,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 07:23:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:47,328 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-01-31 07:23:47,328 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 1 case distinctions, treesize of input 22 treesize of output 31 [2022-01-31 07:23:47,352 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 23 treesize of output 7 [2022-01-31 07:23:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-01-31 07:23:47,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:47,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883593832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:47,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:47,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-01-31 07:23:47,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439162847] [2022-01-31 07:23:47,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:47,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 07:23:47,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 07:23:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:23:47,384 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:47,434 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2022-01-31 07:23:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 07:23:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 07:23:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:47,435 INFO L225 Difference]: With dead ends: 86 [2022-01-31 07:23:47,435 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 07:23:47,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-01-31 07:23:47,437 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:47,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 212 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 07:23:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-01-31 07:23:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 74 states have internal predecessors, (91), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2022-01-31 07:23:47,447 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 42 [2022-01-31 07:23:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:47,447 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2022-01-31 07:23:47,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2022-01-31 07:23:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 07:23:47,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:47,452 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 07:23:47,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:47,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:47,655 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1939903538, now seen corresponding path program 1 times [2022-01-31 07:23:47,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:47,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720249517] [2022-01-31 07:23:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:47,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 07:23:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:47,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:47,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720249517] [2022-01-31 07:23:47,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720249517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:47,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738170464] [2022-01-31 07:23:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:47,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:47,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:47,783 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 07:23:47,784 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 07:23:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:47,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:47,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:48,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738170464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:48,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:48,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 07:23:48,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986457521] [2022-01-31 07:23:48,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:48,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 07:23:48,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 07:23:48,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 07:23:48,106 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:48,490 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2022-01-31 07:23:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 07:23:48,490 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-01-31 07:23:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:48,491 INFO L225 Difference]: With dead ends: 107 [2022-01-31 07:23:48,491 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 07:23:48,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 07:23:48,493 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:48,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 73 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 07:23:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-01-31 07:23:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 98 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2022-01-31 07:23:48,500 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 50 [2022-01-31 07:23:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:48,500 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2022-01-31 07:23:48,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2022-01-31 07:23:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 07:23:48,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:48,501 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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 07:23:48,519 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 07:23:48,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,702 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1002558490, now seen corresponding path program 2 times [2022-01-31 07:23:48,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:48,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374528658] [2022-01-31 07:23:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:48,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 07:23:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:48,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374528658] [2022-01-31 07:23:48,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374528658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337884972] [2022-01-31 07:23:48,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:48,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:48,970 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 07:23:48,992 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 07:23:49,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:23:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:23:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:49,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:49,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337884972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:49,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:49,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 07:23:49,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252521333] [2022-01-31 07:23:49,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:49,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 07:23:49,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:49,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 07:23:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:23:49,790 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:50,805 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2022-01-31 07:23:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 07:23:50,806 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2022-01-31 07:23:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:50,807 INFO L225 Difference]: With dead ends: 155 [2022-01-31 07:23:50,807 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 07:23:50,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 07:23:50,810 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:50,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 68 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 07:23:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-01-31 07:23:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 146 states have internal predecessors, (163), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2022-01-31 07:23:50,813 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 74 [2022-01-31 07:23:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:50,813 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2022-01-31 07:23:50,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2022-01-31 07:23:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 07:23:50,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:50,814 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 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 07:23:50,849 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 07:23:51,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:51,028 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1286165526, now seen corresponding path program 3 times [2022-01-31 07:23:51,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:51,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346861387] [2022-01-31 07:23:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:51,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:51,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 07:23:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:51,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:51,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346861387] [2022-01-31 07:23:51,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346861387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:51,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550814821] [2022-01-31 07:23:51,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:23:51,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:51,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:51,918 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 07:23:51,920 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 07:23:51,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 07:23:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 07:23:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2022-01-31 07:23:52,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-01-31 07:23:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550814821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:52,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:52,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2022-01-31 07:23:52,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214543145] [2022-01-31 07:23:52,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:52,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 07:23:52,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 07:23:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 07:23:52,385 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:53,928 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2022-01-31 07:23:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 07:23:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 122 [2022-01-31 07:23:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:53,929 INFO L225 Difference]: With dead ends: 211 [2022-01-31 07:23:53,929 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 07:23:53,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3820, Invalid=8612, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 07:23:53,932 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 300 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:53,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 82 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:23:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 07:23:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 187. [2022-01-31 07:23:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 175 states have (on average 1.1428571428571428) internal successors, (200), 177 states have internal predecessors, (200), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 07:23:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 215 transitions. [2022-01-31 07:23:53,936 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 215 transitions. Word has length 122 [2022-01-31 07:23:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:53,936 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 215 transitions. [2022-01-31 07:23:53,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 215 transitions. [2022-01-31 07:23:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 07:23:53,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:53,937 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:53,953 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 07:23:54,143 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,SelfDestructingSolverStorable11 [2022-01-31 07:23:54,143 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1945409376, now seen corresponding path program 4 times [2022-01-31 07:23:54,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:54,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354278652] [2022-01-31 07:23:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:54,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 07:23:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:23:54,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:54,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354278652] [2022-01-31 07:23:54,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354278652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:54,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799950106] [2022-01-31 07:23:54,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:23:54,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:54,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:54,991 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 07:23:55,023 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 07:23:55,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:23:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 07:23:55,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 07:23:55,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:23:57,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799950106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:57,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:57,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-01-31 07:23:57,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599895944] [2022-01-31 07:23:57,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:57,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 07:23:57,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 07:23:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 07:23:57,602 INFO L87 Difference]: Start difference. First operand 187 states and 215 transitions. Second operand has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:00,757 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2022-01-31 07:24:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 07:24:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-01-31 07:24:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:00,759 INFO L225 Difference]: With dead ends: 285 [2022-01-31 07:24:00,759 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 07:24:00,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 07:24:00,763 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 231 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:00,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 83 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:24:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 07:24:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-01-31 07:24:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 273 states have (on average 1.0915750915750915) internal successors, (298), 275 states have internal predecessors, (298), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 07:24:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 313 transitions. [2022-01-31 07:24:00,768 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 313 transitions. Word has length 133 [2022-01-31 07:24:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:00,768 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 313 transitions. [2022-01-31 07:24:00,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 313 transitions. [2022-01-31 07:24:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 07:24:00,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:00,769 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:24:00,788 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 07:24:00,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 07:24:00,979 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1405990338, now seen corresponding path program 5 times [2022-01-31 07:24:00,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:00,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714238460] [2022-01-31 07:24:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:00,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-01-31 07:24:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:24:03,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:03,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714238460] [2022-01-31 07:24:03,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714238460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:03,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870135137] [2022-01-31 07:24:03,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:24:03,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:03,880 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 07:24:03,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process