/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/standard_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:37:18,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:37:18,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:37:18,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:37:18,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:37:18,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:37:18,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:37:18,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:37:18,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:37:18,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:37:18,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:37:18,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:37:18,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:37:18,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:37:18,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:37:18,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:37:18,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:37:18,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:37:18,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:37:18,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:37:18,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:37:18,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:37:18,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:37:18,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:37:18,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:37:18,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:37:18,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:37:18,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:37:18,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:37:18,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:37:18,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:37:18,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:37:18,976 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:37:18,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:37:18,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:37:18,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:37:18,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:37:18,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:37:18,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:37:18,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:37:18,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:37:18,977 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:37:18,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:37:18,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:37:18,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:37:18,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:37:18,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:37:18,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:37:18,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:37:18,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:37:18,979 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:37:18,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:37:19,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:37:19,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:37:19,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:37:19,178 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:37:19,179 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:37:19,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2022-01-31 07:37:19,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b967218c/efd6e5cefb4f41ada353af2ad42e560f/FLAGf8c0eca6a [2022-01-31 07:37:19,581 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:37:19,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2022-01-31 07:37:19,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b967218c/efd6e5cefb4f41ada353af2ad42e560f/FLAGf8c0eca6a [2022-01-31 07:37:19,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b967218c/efd6e5cefb4f41ada353af2ad42e560f [2022-01-31 07:37:19,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:37:19,597 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:37:19,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:37:19,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:37:19,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:37:19,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d01f713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19, skipping insertion in model container [2022-01-31 07:37:19,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:37:19,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:37:19,729 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/standard_copy1_ground-2.i[816,829] [2022-01-31 07:37:19,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:37:19,740 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:37:19,747 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/standard_copy1_ground-2.i[816,829] [2022-01-31 07:37:19,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:37:19,759 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:37:19,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19 WrapperNode [2022-01-31 07:37:19,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:37:19,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:37:19,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:37:19,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:37:19,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:37:19,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:37:19,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:37:19,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:37:19,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (1/1) ... [2022-01-31 07:37:19,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:37:19,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:19,806 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 07:37:19,824 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 07:37:19,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:37:19,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:37:19,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:37:19,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:37:19,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:37:19,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:37:19,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:37:19,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:37:19,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:37:19,834 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:37:19,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:37:19,900 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:37:19,901 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:37:20,004 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:37:20,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:37:20,009 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 07:37:20,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:37:20 BoogieIcfgContainer [2022-01-31 07:37:20,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:37:20,011 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:37:20,011 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:37:20,028 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:37:20,030 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:37:20" (1/1) ... [2022-01-31 07:37:20,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:37:20 BasicIcfg [2022-01-31 07:37:20,050 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:37:20,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:37:20,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:37:20,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:37:20,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:37:19" (1/4) ... [2022-01-31 07:37:20,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b63ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:37:20, skipping insertion in model container [2022-01-31 07:37:20,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:19" (2/4) ... [2022-01-31 07:37:20,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b63ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:37:20, skipping insertion in model container [2022-01-31 07:37:20,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:37:20" (3/4) ... [2022-01-31 07:37:20,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b63ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:37:20, skipping insertion in model container [2022-01-31 07:37:20,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:37:20" (4/4) ... [2022-01-31 07:37:20,055 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.iJordan [2022-01-31 07:37:20,058 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:37:20,058 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:37:20,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:37:20,113 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 07:37:20,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:37:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:37:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 07:37:20,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:20,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:20,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:20,141 INFO L85 PathProgramCache]: Analyzing trace with hash -839270659, now seen corresponding path program 1 times [2022-01-31 07:37:20,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:20,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111101740] [2022-01-31 07:37:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:20,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:20,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:20,282 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 07:37:20,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:20,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111101740] [2022-01-31 07:37:20,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111101740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:37:20,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:37:20,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:37:20,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111022934] [2022-01-31 07:37:20,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:37:20,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:37:20,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:37:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:37:20,318 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 07:37:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:20,348 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-01-31 07:37:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:37:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-01-31 07:37:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:20,363 INFO L225 Difference]: With dead ends: 27 [2022-01-31 07:37:20,363 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 07:37:20,365 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 07:37:20,373 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:20,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 07:37:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 07:37:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 07:37:20,397 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 07:37:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:20,397 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 07:37:20,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 07:37:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 07:37:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 07:37:20,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:20,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:20,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:37:20,399 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1759221441, now seen corresponding path program 1 times [2022-01-31 07:37:20,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107570252] [2022-01-31 07:37:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:20,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:20,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:20,490 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 07:37:20,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:20,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107570252] [2022-01-31 07:37:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107570252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:37:20,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:37:20,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:37:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670940998] [2022-01-31 07:37:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:37:20,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:37:20,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:37:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:37:20,495 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 07:37:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:20,544 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-01-31 07:37:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:37:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-01-31 07:37:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:20,546 INFO L225 Difference]: With dead ends: 24 [2022-01-31 07:37:20,546 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 07:37:20,550 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 07:37:20,551 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:20,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 07:37:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-31 07:37:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-31 07:37:20,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2022-01-31 07:37:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:20,560 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-31 07:37:20,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 07:37:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-31 07:37:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 07:37:20,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:20,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:20,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:37:20,566 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:20,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1271531299, now seen corresponding path program 1 times [2022-01-31 07:37:20,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:20,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859672893] [2022-01-31 07:37:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:20,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:20,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:20,639 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 07:37:20,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:20,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859672893] [2022-01-31 07:37:20,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859672893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:20,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762029410] [2022-01-31 07:37:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:20,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:20,644 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 07:37:20,645 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 07:37:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:20,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:37:20,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:20,779 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 07:37:20,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:37:20,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762029410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:37:20,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:37:20,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:37:20,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734694206] [2022-01-31 07:37:20,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:37:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:37:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:37:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:37:20,786 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 07:37:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:20,793 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 07:37:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:37:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2022-01-31 07:37:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:20,795 INFO L225 Difference]: With dead ends: 25 [2022-01-31 07:37:20,795 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 07:37:20,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 07:37:20,799 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:20,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 07:37:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-31 07:37:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 07:37:20,805 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-01-31 07:37:20,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:20,805 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 07:37:20,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 07:37:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 07:37:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 07:37:20,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:20,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:20,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 07:37:21,026 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 07:37:21,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash 852859995, now seen corresponding path program 1 times [2022-01-31 07:37:21,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:21,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723409956] [2022-01-31 07:37:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:21,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:21,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:37:21,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:21,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723409956] [2022-01-31 07:37:21,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723409956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:21,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996223482] [2022-01-31 07:37:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:21,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:21,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:21,088 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 07:37:21,089 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 07:37:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:37:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:37:21,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:37:21,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996223482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:21,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:21,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:37:21,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9947236] [2022-01-31 07:37:21,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:21,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:37:21,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:37:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:37:21,282 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 07:37:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:21,374 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-01-31 07:37:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:37:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 19 [2022-01-31 07:37:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:21,376 INFO L225 Difference]: With dead ends: 30 [2022-01-31 07:37:21,376 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 07:37:21,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 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 07:37:21,378 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:21,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 07:37:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 07:37:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-31 07:37:21,385 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2022-01-31 07:37:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:21,386 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-31 07:37:21,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 07:37:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-31 07:37:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 07:37:21,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:21,387 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:21,421 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 07:37:21,603 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 07:37:21,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 218898357, now seen corresponding path program 2 times [2022-01-31 07:37:21,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:21,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179103698] [2022-01-31 07:37:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:21,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:21,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:21,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179103698] [2022-01-31 07:37:21,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179103698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302587723] [2022-01-31 07:37:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:37:21,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:21,696 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 07:37:21,700 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 07:37:21,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:37:21,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:37:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:21,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:21,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302587723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:21,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:21,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:37:21,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291295462] [2022-01-31 07:37:21,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:21,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:37:21,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:37:21,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:37:21,873 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 07:37:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:21,948 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-01-31 07:37:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:37:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 25 [2022-01-31 07:37:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:21,949 INFO L225 Difference]: With dead ends: 36 [2022-01-31 07:37:21,949 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 07:37:21,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 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 07:37:21,950 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:21,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 07:37:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 07:37:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 07:37:21,953 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2022-01-31 07:37:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:21,953 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 07:37:21,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 07:37:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 07:37:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 07:37:21,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:21,954 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:21,975 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 07:37:22,173 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 07:37:22,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1317253551, now seen corresponding path program 3 times [2022-01-31 07:37:22,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:22,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910442919] [2022-01-31 07:37:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:22,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:22,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:22,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:22,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910442919] [2022-01-31 07:37:22,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910442919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:22,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586935816] [2022-01-31 07:37:22,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:37:22,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:22,252 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 07:37:22,254 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 07:37:22,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 07:37:22,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:37:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:22,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:22,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586935816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:22,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:22,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-31 07:37:22,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465191448] [2022-01-31 07:37:22,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:22,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 07:37:22,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 07:37:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:37:22,519 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 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 07:37:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:22,735 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-01-31 07:37:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 07:37:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 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 31 [2022-01-31 07:37:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:22,738 INFO L225 Difference]: With dead ends: 51 [2022-01-31 07:37:22,738 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 07:37:22,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 07:37:22,740 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:22,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 07:37:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 07:37:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-01-31 07:37:22,745 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 31 [2022-01-31 07:37:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:22,746 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-01-31 07:37:22,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 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 07:37:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-01-31 07:37:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 07:37:22,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:22,748 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:22,765 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 07:37:22,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:22,966 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1044308417, now seen corresponding path program 4 times [2022-01-31 07:37:22,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:22,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465524541] [2022-01-31 07:37:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:22,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:23,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:23,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:23,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465524541] [2022-01-31 07:37:23,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465524541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:23,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99835904] [2022-01-31 07:37:23,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:37:23,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:23,040 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 07:37:23,075 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 07:37:23,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:37:23,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 07:37:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:23,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:23,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99835904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:23,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:23,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 07:37:23,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255729133] [2022-01-31 07:37:23,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:23,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 07:37:23,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 07:37:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:37:23,306 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 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 07:37:23,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:23,477 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-01-31 07:37:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:37:23,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 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 45 [2022-01-31 07:37:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:23,478 INFO L225 Difference]: With dead ends: 64 [2022-01-31 07:37:23,478 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 07:37:23,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:37:23,479 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:23,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 07:37:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 07:37:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 07:37:23,482 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 45 [2022-01-31 07:37:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:23,482 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 07:37:23,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 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 07:37:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 07:37:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 07:37:23,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:23,483 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:23,500 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 07:37:23,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:23,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash 727404051, now seen corresponding path program 5 times [2022-01-31 07:37:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:23,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039136319] [2022-01-31 07:37:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:23,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:23,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:23,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039136319] [2022-01-31 07:37:23,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039136319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959414561] [2022-01-31 07:37:23,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:37:23,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:23,835 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 07:37:23,836 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 07:37:24,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-31 07:37:24,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:37:24,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 07:37:24,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 07:37:25,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959414561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:25,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:25,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 38 [2022-01-31 07:37:25,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775010935] [2022-01-31 07:37:25,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:25,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 07:37:25,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 07:37:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 07:37:25,006 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 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 07:37:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:25,613 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-01-31 07:37:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 07:37:25,613 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 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 59 [2022-01-31 07:37:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:25,614 INFO L225 Difference]: With dead ends: 91 [2022-01-31 07:37:25,614 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 07:37:25,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1140, Invalid=4116, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 07:37:25,617 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:25,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 56 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 07:37:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 07:37:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-01-31 07:37:25,622 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 59 [2022-01-31 07:37:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:25,622 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-01-31 07:37:25,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 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 07:37:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-01-31 07:37:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 07:37:25,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:25,623 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:25,649 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 07:37:25,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:25,837 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash -584734823, now seen corresponding path program 6 times [2022-01-31 07:37:25,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:25,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562206243] [2022-01-31 07:37:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:25,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:26,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 07:37:26,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562206243] [2022-01-31 07:37:26,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562206243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268719030] [2022-01-31 07:37:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:37:26,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:26,035 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 07:37:26,036 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 07:37:31,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-01-31 07:37:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:31,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:37:31,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-01-31 07:37:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-01-31 07:37:32,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268719030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:32,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:32,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 63 [2022-01-31 07:37:32,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972621206] [2022-01-31 07:37:32,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:32,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 07:37:32,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 07:37:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1249, Invalid=2657, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 07:37:32,942 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 states have internal predecessors, (136), 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 07:37:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:34,325 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2022-01-31 07:37:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 07:37:34,325 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 states have internal predecessors, (136), 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 85 [2022-01-31 07:37:34,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:34,327 INFO L225 Difference]: With dead ends: 141 [2022-01-31 07:37:34,327 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 07:37:34,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3741, Invalid=11265, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 07:37:34,332 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:34,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 46 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:37:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 07:37:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-31 07:37:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-01-31 07:37:34,337 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 85 [2022-01-31 07:37:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:34,337 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-01-31 07:37:34,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 states have internal predecessors, (136), 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 07:37:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-01-31 07:37:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 07:37:34,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:34,338 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:34,363 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 07:37:34,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:34,553 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1607236231, now seen corresponding path program 7 times [2022-01-31 07:37:34,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282026738] [2022-01-31 07:37:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:34,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:34,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:34,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282026738] [2022-01-31 07:37:34,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282026738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297243674] [2022-01-31 07:37:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:37:34,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:34,757 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 07:37:34,758 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 07:37:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 07:37:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:35,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:35,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297243674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:35,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:35,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 07:37:35,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008825803] [2022-01-31 07:37:35,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:35,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 07:37:35,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:35,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 07:37:35,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 07:37:35,455 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 07:37:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:35,960 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2022-01-31 07:37:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 07:37:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 135 [2022-01-31 07:37:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:35,961 INFO L225 Difference]: With dead ends: 172 [2022-01-31 07:37:35,962 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 07:37:35,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 07:37:35,963 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:35,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 43 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:35,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 07:37:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-01-31 07:37:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-01-31 07:37:35,971 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 135 [2022-01-31 07:37:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:35,971 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-01-31 07:37:35,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 07:37:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-01-31 07:37:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 07:37:35,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:35,972 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:35,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 07:37:36,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 07:37:36,192 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash -203878297, now seen corresponding path program 8 times [2022-01-31 07:37:36,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:36,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210029395] [2022-01-31 07:37:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:36,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:36,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:36,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210029395] [2022-01-31 07:37:36,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210029395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:36,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835482096] [2022-01-31 07:37:36,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:37:36,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:36,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:36,665 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 07:37:36,677 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 07:37:36,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:37:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:36,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 07:37:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:37,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:38,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835482096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:38,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:38,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-01-31 07:37:38,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752969967] [2022-01-31 07:37:38,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:38,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 07:37:38,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 07:37:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 07:37:38,254 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 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 07:37:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:39,737 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2022-01-31 07:37:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 07:37:39,737 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 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 167 [2022-01-31 07:37:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:39,738 INFO L225 Difference]: With dead ends: 236 [2022-01-31 07:37:39,738 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 07:37:39,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6113, Invalid=10143, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 07:37:39,742 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 171 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:39,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 53 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:37:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 07:37:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-01-31 07:37:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2022-01-31 07:37:39,754 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 167 [2022-01-31 07:37:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:39,755 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2022-01-31 07:37:39,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 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 07:37:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2022-01-31 07:37:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 07:37:39,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:39,757 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:39,782 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 07:37:39,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:39,976 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1316766681, now seen corresponding path program 9 times [2022-01-31 07:37:39,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251831404] [2022-01-31 07:37:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:39,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:41,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5960 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:41,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:41,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251831404] [2022-01-31 07:37:41,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251831404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:41,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174145936] [2022-01-31 07:37:41,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:37:41,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:41,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:41,392 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 07:37:41,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 07:49:05,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-01-31 07:49:05,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:49:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 07:49:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:49:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-01-31 07:49:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:49:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-01-31 07:49:10,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174145936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:49:10,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:49:10,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 49, 49] total 160 [2022-01-31 07:49:10,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76625990] [2022-01-31 07:49:10,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:49:10,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-01-31 07:49:10,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:49:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-01-31 07:49:10,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6641, Invalid=18799, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 07:49:10,503 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand has 160 states, 160 states have (on average 2.0625) internal successors, (330), 159 states have internal predecessors, (330), 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 07:49:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:49:17,524 INFO L93 Difference]: Finished difference Result 335 states and 337 transitions. [2022-01-31 07:49:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 07:49:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.0625) internal successors, (330), 159 states have internal predecessors, (330), 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 231 [2022-01-31 07:49:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:49:17,528 INFO L225 Difference]: With dead ends: 335 [2022-01-31 07:49:17,528 INFO L226 Difference]: Without dead ends: 335 [2022-01-31 07:49:17,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22069 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=19917, Invalid=80255, Unknown=0, NotChecked=0, Total=100172 [2022-01-31 07:49:17,535 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 330 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:49:17,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 86 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:49:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-31 07:49:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 334. [2022-01-31 07:49:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 328 states have (on average 1.0091463414634145) internal successors, (331), 328 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:49:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 336 transitions. [2022-01-31 07:49:17,547 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 336 transitions. Word has length 231 [2022-01-31 07:49:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:49:17,548 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 336 transitions. [2022-01-31 07:49:17,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 2.0625) internal successors, (330), 159 states have internal predecessors, (330), 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 07:49:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 336 transitions. [2022-01-31 07:49:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 07:49:17,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:49:17,555 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:49:17,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 07:49:17,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 07:49:17,779 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:49:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:49:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash -521421467, now seen corresponding path program 10 times [2022-01-31 07:49:17,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:49:17,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384103823] [2022-01-31 07:49:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:49:17,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:49:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:49:19,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:49:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:49:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12805 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2022-01-31 07:49:19,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:49:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384103823] [2022-01-31 07:49:19,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384103823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:49:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327614982] [2022-01-31 07:49:19,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:49:19,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:49:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:49:19,190 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:49:19,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 07:49:19,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:49:19,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:49:19,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-31 07:49:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:49:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12805 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2022-01-31 07:49:24,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:49:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12805 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2022-01-31 07:49:33,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327614982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:49:33,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:49:33,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 97, 97] total 257 [2022-01-31 07:49:33,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102630068] [2022-01-31 07:49:33,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:49:33,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2022-01-31 07:49:33,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:49:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2022-01-31 07:49:33,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20482, Invalid=45310, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 07:49:33,112 INFO L87 Difference]: Start difference. First operand 334 states and 336 transitions. Second operand has 257 states, 257 states have (on average 2.0389105058365757) internal successors, (524), 256 states have internal predecessors, (524), 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 07:49:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:49:50,543 INFO L93 Difference]: Finished difference Result 529 states and 531 transitions. [2022-01-31 07:49:50,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-01-31 07:49:50,543 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 2.0389105058365757) internal successors, (524), 256 states have internal predecessors, (524), 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 329 [2022-01-31 07:49:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:49:50,545 INFO L225 Difference]: With dead ends: 529 [2022-01-31 07:49:50,545 INFO L226 Difference]: Without dead ends: 529 [2022-01-31 07:49:50,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54551 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=61440, Invalid=199170, Unknown=0, NotChecked=0, Total=260610 [2022-01-31 07:49:50,558 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 619 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:49:50,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 71 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 07:49:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-31 07:49:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 528. [2022-01-31 07:49:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.0057471264367817) internal successors, (525), 522 states have internal predecessors, (525), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:49:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 530 transitions. [2022-01-31 07:49:50,566 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 530 transitions. Word has length 329 [2022-01-31 07:49:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:49:50,566 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 530 transitions. [2022-01-31 07:49:50,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 2.0389105058365757) internal successors, (524), 256 states have internal predecessors, (524), 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 07:49:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 530 transitions. [2022-01-31 07:49:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-01-31 07:49:50,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:49:50,572 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:49:50,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 07:49:50,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 07:49:50,794 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:49:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:49:50,795 INFO L85 PathProgramCache]: Analyzing trace with hash 439767747, now seen corresponding path program 11 times [2022-01-31 07:49:50,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:49:50,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413918081] [2022-01-31 07:49:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:49:50,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:49:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:49:52,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:49:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:49:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 40196 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2022-01-31 07:49:52,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:49:52,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413918081] [2022-01-31 07:49:52,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413918081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:49:52,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753261722] [2022-01-31 07:49:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:49:52,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:49:52,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:49:52,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:49:52,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process