/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-tiling/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:49:06,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:49:06,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:49:06,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:49:06,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:49:06,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:49:06,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:49:06,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:49:06,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:49:06,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:49:06,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:49:06,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:49:06,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:49:06,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:49:06,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:49:06,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:49:06,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:49:06,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:49:06,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:49:06,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:49:06,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:49:06,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:49:06,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:49:06,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:49:06,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:49:06,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:49:06,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:49:06,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:49:06,882 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:49:06,888 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:49:06,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:49:06,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:49:06,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:49:06,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:49:06,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:49:06,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:49:06,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:49:06,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:49:06,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:49:06,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:49:06,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:49:06,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:49:06,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:49:06,891 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:49:06,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:49:07,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:49:07,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:49:07,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:49:07,069 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:49:07,069 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:49:07,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2022-01-31 08:49:07,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24f7d41d7/cac4fc6380054bb4921198f61479d273/FLAG8329c85fc [2022-01-31 08:49:07,498 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:49:07,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c [2022-01-31 08:49:07,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24f7d41d7/cac4fc6380054bb4921198f61479d273/FLAG8329c85fc [2022-01-31 08:49:07,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24f7d41d7/cac4fc6380054bb4921198f61479d273 [2022-01-31 08:49:07,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:49:07,529 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:49:07,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:49:07,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:49:07,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:49:07,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a01a8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07, skipping insertion in model container [2022-01-31 08:49:07,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:49:07,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:49:07,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c[396,409] [2022-01-31 08:49:07,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:49:07,725 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:49:07,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c[396,409] [2022-01-31 08:49:07,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:49:07,764 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:49:07,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07 WrapperNode [2022-01-31 08:49:07,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:49:07,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:49:07,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:49:07,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:49:07,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:49:07,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:49:07,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:49:07,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:49:07,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (1/1) ... [2022-01-31 08:49:07,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:49:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:07,845 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 08:49:07,848 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 08:49:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:49:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:49:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:49:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 08:49:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:49:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:49:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:49:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:49:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:49:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:49:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 08:49:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:49:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:49:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:49:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:49:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:49:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:49:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:49:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:49:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:49:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:49:07,923 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:49:07,924 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:49:08,216 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:49:08,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:49:08,220 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 08:49:08,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:49:08 BoogieIcfgContainer [2022-01-31 08:49:08,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:49:08,222 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:49:08,222 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:49:08,223 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:49:08,226 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:49:08" (1/1) ... [2022-01-31 08:49:08,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:49:08 BasicIcfg [2022-01-31 08:49:08,247 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:49:08,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:49:08,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:49:08,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:49:08,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:49:07" (1/4) ... [2022-01-31 08:49:08,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a29c1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:49:08, skipping insertion in model container [2022-01-31 08:49:08,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:07" (2/4) ... [2022-01-31 08:49:08,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a29c1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:49:08, skipping insertion in model container [2022-01-31 08:49:08,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:49:08" (3/4) ... [2022-01-31 08:49:08,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a29c1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:49:08, skipping insertion in model container [2022-01-31 08:49:08,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:49:08" (4/4) ... [2022-01-31 08:49:08,253 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr4.cJordan [2022-01-31 08:49:08,257 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:49:08,257 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:49:08,285 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:49:08,290 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 08:49:08,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:49:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 08:49:08,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:08,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:08,324 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash 644249710, now seen corresponding path program 1 times [2022-01-31 08:49:08,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:08,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19150553] [2022-01-31 08:49:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:08,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,528 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 08:49:08,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:08,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19150553] [2022-01-31 08:49:08,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19150553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:08,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:08,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:49:08,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608059140] [2022-01-31 08:49:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:08,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:49:08,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:49:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:49:08,557 INFO L87 Difference]: Start difference. First operand has 51 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:08,644 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-01-31 08:49:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:49:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 08:49:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:08,651 INFO L225 Difference]: With dead ends: 51 [2022-01-31 08:49:08,651 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 08:49:08,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:49:08,655 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:08,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 66 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:49:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 08:49:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-31 08:49:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:49:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-01-31 08:49:08,679 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 28 [2022-01-31 08:49:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:08,679 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-01-31 08:49:08,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-01-31 08:49:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 08:49:08,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:08,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:08,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:49:08,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 816998281, now seen corresponding path program 1 times [2022-01-31 08:49:08,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:08,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977648674] [2022-01-31 08:49:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:08,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,751 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 08:49:08,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977648674] [2022-01-31 08:49:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977648674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:08,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:08,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:49:08,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009606353] [2022-01-31 08:49:08,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:08,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:49:08,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:49:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:49:08,754 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:08,887 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-01-31 08:49:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:49:08,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 08:49:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:08,890 INFO L225 Difference]: With dead ends: 51 [2022-01-31 08:49:08,890 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 08:49:08,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:49:08,896 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 17 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:08,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:49:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 08:49:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 08:49:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-01-31 08:49:08,906 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2022-01-31 08:49:08,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:08,906 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-01-31 08:49:08,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-01-31 08:49:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 08:49:08,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:08,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:08,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:49:08,908 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:08,909 INFO L85 PathProgramCache]: Analyzing trace with hash 817921802, now seen corresponding path program 1 times [2022-01-31 08:49:08,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:08,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059591947] [2022-01-31 08:49:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:08,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,100 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 08:49:09,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:09,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059591947] [2022-01-31 08:49:09,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059591947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:09,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:09,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:49:09,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670057209] [2022-01-31 08:49:09,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:09,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:49:09,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:49:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:49:09,103 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:09,231 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-01-31 08:49:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:49:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-01-31 08:49:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:09,236 INFO L225 Difference]: With dead ends: 66 [2022-01-31 08:49:09,236 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 08:49:09,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:49:09,241 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:09,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 42 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:49:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 08:49:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2022-01-31 08:49:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 45 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-01-31 08:49:09,246 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 28 [2022-01-31 08:49:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:09,246 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-01-31 08:49:09,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-01-31 08:49:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 08:49:09,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:09,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:09,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:49:09,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1797619207, now seen corresponding path program 1 times [2022-01-31 08:49:09,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:09,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378569888] [2022-01-31 08:49:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:09,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:49:09,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:09,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378569888] [2022-01-31 08:49:09,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378569888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:09,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:09,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:49:09,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083369661] [2022-01-31 08:49:09,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:09,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:49:09,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:49:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:49:09,363 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:09,421 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-01-31 08:49:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:49:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-31 08:49:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:09,430 INFO L225 Difference]: With dead ends: 54 [2022-01-31 08:49:09,430 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 08:49:09,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:49:09,431 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:09,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 54 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:49:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 08:49:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 08:49:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-01-31 08:49:09,439 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 44 [2022-01-31 08:49:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:09,439 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-01-31 08:49:09,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-01-31 08:49:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 08:49:09,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:09,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:09,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:49:09,441 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash 667848, now seen corresponding path program 1 times [2022-01-31 08:49:09,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:09,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976882124] [2022-01-31 08:49:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:09,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:09,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976882124] [2022-01-31 08:49:09,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976882124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:09,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660748502] [2022-01-31 08:49:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:09,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:09,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:09,967 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 08:49:09,980 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 08:49:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:10,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-31 08:49:10,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:10,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:10,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-01-31 08:49:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:10,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 35 [2022-01-31 08:49:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-31 08:49:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:10,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-31 08:49:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:10,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 42 [2022-01-31 08:49:10,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:10,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2022-01-31 08:49:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:10,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:11,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-31 08:49:11,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2022-01-31 08:49:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:49:11,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660748502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:11,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:11,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-01-31 08:49:11,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452501424] [2022-01-31 08:49:11,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:11,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:49:11,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:49:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:49:11,186 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 25 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:11,722 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-01-31 08:49:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:49:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2022-01-31 08:49:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:11,724 INFO L225 Difference]: With dead ends: 81 [2022-01-31 08:49:11,724 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 08:49:11,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:49:11,726 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 166 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:11,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 160 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:49:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 08:49:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2022-01-31 08:49:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.173913043478261) internal successors, (54), 47 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-01-31 08:49:11,731 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 44 [2022-01-31 08:49:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:11,731 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-01-31 08:49:11,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-01-31 08:49:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 08:49:11,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:11,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:11,770 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 08:49:11,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:11,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1973889761, now seen corresponding path program 1 times [2022-01-31 08:49:11,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:11,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537124279] [2022-01-31 08:49:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:11,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:13,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:13,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:13,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:49:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:13,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:13,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537124279] [2022-01-31 08:49:13,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537124279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:13,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134414746] [2022-01-31 08:49:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:13,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:13,198 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 08:49:13,199 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 08:49:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-31 08:49:13,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:13,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:13,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2022-01-31 08:49:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-01-31 08:49:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:13,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 40 [2022-01-31 08:49:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 32 [2022-01-31 08:49:13,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:13,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 44 [2022-01-31 08:49:13,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:13,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-01-31 08:49:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:49:13,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:14,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 106 [2022-01-31 08:49:14,384 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-31 08:49:14,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 163 [2022-01-31 08:49:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:49:14,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134414746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:14,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:14,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 33 [2022-01-31 08:49:14,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450014184] [2022-01-31 08:49:14,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:14,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 08:49:14,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 08:49:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 08:49:14,570 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 33 states, 32 states have (on average 3.65625) internal successors, (117), 31 states have internal predecessors, (117), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:49:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:16,385 INFO L93 Difference]: Finished difference Result 167 states and 202 transitions. [2022-01-31 08:49:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 08:49:16,385 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.65625) internal successors, (117), 31 states have internal predecessors, (117), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 53 [2022-01-31 08:49:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:16,387 INFO L225 Difference]: With dead ends: 167 [2022-01-31 08:49:16,387 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 08:49:16,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 15 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=706, Invalid=4124, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 08:49:16,389 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 420 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:16,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 276 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 786 Invalid, 0 Unknown, 198 Unchecked, 0.5s Time] [2022-01-31 08:49:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 08:49:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 111. [2022-01-31 08:49:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 95 states have (on average 1.168421052631579) internal successors, (111), 97 states have internal predecessors, (111), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 08:49:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-01-31 08:49:16,405 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 53 [2022-01-31 08:49:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:16,406 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-01-31 08:49:16,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.65625) internal successors, (117), 31 states have internal predecessors, (117), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:49:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-01-31 08:49:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 08:49:16,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:16,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:16,425 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 08:49:16,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 08:49:16,625 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:16,626 INFO L85 PathProgramCache]: Analyzing trace with hash -927299719, now seen corresponding path program 1 times [2022-01-31 08:49:16,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:16,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990834161] [2022-01-31 08:49:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:16,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:49:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 08:49:16,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:16,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990834161] [2022-01-31 08:49:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990834161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:16,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:16,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:49:16,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162494637] [2022-01-31 08:49:16,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:16,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:49:16,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:49:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:49:16,674 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:49:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:16,708 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2022-01-31 08:49:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:49:16,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-01-31 08:49:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:16,710 INFO L225 Difference]: With dead ends: 111 [2022-01-31 08:49:16,710 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 08:49:16,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:49:16,710 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:16,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 54 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:49:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 08:49:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-31 08:49:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 97 states have internal predecessors, (108), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 08:49:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2022-01-31 08:49:16,715 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 57 [2022-01-31 08:49:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:16,715 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2022-01-31 08:49:16,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:49:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2022-01-31 08:49:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 08:49:16,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:16,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:16,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 08:49:16,717 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:16,717 INFO L85 PathProgramCache]: Analyzing trace with hash 470397594, now seen corresponding path program 2 times [2022-01-31 08:49:16,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:16,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674319916] [2022-01-31 08:49:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:16,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:49:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:49:16,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674319916] [2022-01-31 08:49:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674319916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:16,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879885730] [2022-01-31 08:49:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:49:16,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:16,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:16,867 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 08:49:16,880 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 08:49:16,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:49:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:49:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:49:17,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:49:17,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879885730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:17,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:17,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2022-01-31 08:49:17,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112680661] [2022-01-31 08:49:17,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:17,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 08:49:17,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 08:49:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-31 08:49:17,305 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 16 states have internal predecessors, (81), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:49:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:17,805 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2022-01-31 08:49:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 08:49:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 16 states have internal predecessors, (81), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2022-01-31 08:49:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:17,807 INFO L225 Difference]: With dead ends: 153 [2022-01-31 08:49:17,807 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 08:49:17,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-31 08:49:17,807 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 342 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:17,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 122 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:49:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 08:49:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2022-01-31 08:49:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 110 states have (on average 1.1) internal successors, (121), 113 states have internal predecessors, (121), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 08:49:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2022-01-31 08:49:17,813 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 57 [2022-01-31 08:49:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:17,813 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2022-01-31 08:49:17,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 16 states have internal predecessors, (81), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:49:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2022-01-31 08:49:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 08:49:17,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:17,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:17,850 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 08:49:18,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:18,032 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 590314728, now seen corresponding path program 3 times [2022-01-31 08:49:18,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:18,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18715423] [2022-01-31 08:49:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:18,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:49:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 08:49:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:18,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18715423] [2022-01-31 08:49:18,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18715423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307386207] [2022-01-31 08:49:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:49:18,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:18,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:18,271 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 08:49:18,297 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 08:49:18,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:49:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:18,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:49:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:18,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-01-31 08:49:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:18,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 63 [2022-01-31 08:49:18,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-01-31 08:49:18,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:49:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:18,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:19,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:49:19,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 08:49:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:49:19,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307386207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:19,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:19,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-31 08:49:19,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052488819] [2022-01-31 08:49:19,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:19,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 08:49:19,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:19,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 08:49:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:49:19,638 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 24 states, 24 states have (on average 5.25) internal successors, (126), 23 states have internal predecessors, (126), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:19,983 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2022-01-31 08:49:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 08:49:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 23 states have internal predecessors, (126), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 62 [2022-01-31 08:49:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:19,985 INFO L225 Difference]: With dead ends: 165 [2022-01-31 08:49:19,985 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 08:49:19,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 08:49:19,985 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 97 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:19,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 175 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 471 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-31 08:49:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 08:49:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 152. [2022-01-31 08:49:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 127 states have (on average 1.094488188976378) internal successors, (139), 130 states have internal predecessors, (139), 14 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 08:49:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-01-31 08:49:19,991 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 62 [2022-01-31 08:49:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:19,991 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-01-31 08:49:19,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 23 states have internal predecessors, (126), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-01-31 08:49:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 08:49:19,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:19,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:20,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:20,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:20,204 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash 233306851, now seen corresponding path program 4 times [2022-01-31 08:49:20,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:20,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385908498] [2022-01-31 08:49:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:20,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:20,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 08:49:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:49:20,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385908498] [2022-01-31 08:49:20,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385908498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539540332] [2022-01-31 08:49:20,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:49:20,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:20,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:20,431 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 08:49:20,432 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 08:49:20,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:49:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:20,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 81 conjunts are in the unsatisfiable core [2022-01-31 08:49:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:20,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:20,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-01-31 08:49:20,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-01-31 08:49:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:20,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 72 [2022-01-31 08:49:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2022-01-31 08:49:20,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:20,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2022-01-31 08:49:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-01-31 08:49:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:20,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:21,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 72 [2022-01-31 08:49:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-01-31 08:49:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:49:21,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-31 08:49:21,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:21,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:49:21,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 52 [2022-01-31 08:49:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:21,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:36,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 154 [2022-01-31 08:49:36,677 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-31 08:49:36,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2263 treesize of output 2215 [2022-01-31 08:49:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 08:49:36,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539540332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:36,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:36,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 17] total 36 [2022-01-31 08:49:36,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855495052] [2022-01-31 08:49:36,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:36,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 08:49:36,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 08:49:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 08:49:36,929 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 36 states, 36 states have (on average 4.333333333333333) internal successors, (156), 34 states have internal predecessors, (156), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:49:40,117 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_main_~MINVAL~0 c_main_~CCCELVOL3~0))) (and (or (<= 0 c_main_~CCCELVOL3~0) .cse0) (forall ((v_ArrVal_740 Int) (v_ArrVal_738 Int) (v_ArrVal_737 Int)) (let ((.cse1 (select (let ((.cse2 (* c_main_~i~0 16))) (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 16) .cse2 |c_main_~#volArray~0.offset|) v_ArrVal_740) (+ .cse2 (- 12) |c_main_~#volArray~0.offset|) v_ArrVal_738) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_737)) (+ |c_main_~#volArray~0.offset| 4)))) (or (<= c_main_~MINVAL~0 .cse1) (= .cse1 0)))) (or (<= c_main_~MINVAL~0 1) .cse0))) is different from false [2022-01-31 08:49:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:40,624 INFO L93 Difference]: Finished difference Result 284 states and 319 transitions. [2022-01-31 08:49:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 08:49:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.333333333333333) internal successors, (156), 34 states have internal predecessors, (156), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 69 [2022-01-31 08:49:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:40,626 INFO L225 Difference]: With dead ends: 284 [2022-01-31 08:49:40,626 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 08:49:40,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 144 SyntacticMatches, 15 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=1002, Invalid=6141, Unknown=1, NotChecked=166, Total=7310 [2022-01-31 08:49:40,628 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 242 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:40,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 378 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1099 Invalid, 0 Unknown, 431 Unchecked, 0.6s Time] [2022-01-31 08:49:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 08:49:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 207. [2022-01-31 08:49:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 182 states have (on average 1.0824175824175823) internal successors, (197), 185 states have internal predecessors, (197), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 08:49:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 226 transitions. [2022-01-31 08:49:40,635 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 226 transitions. Word has length 69 [2022-01-31 08:49:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:40,635 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 226 transitions. [2022-01-31 08:49:40,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.333333333333333) internal successors, (156), 34 states have internal predecessors, (156), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:49:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 226 transitions. [2022-01-31 08:49:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 08:49:40,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:40,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:40,657 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 08:49:40,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:49:40,837 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash -244973304, now seen corresponding path program 5 times [2022-01-31 08:49:40,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:40,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969089390] [2022-01-31 08:49:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:40,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:41,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:41,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:41,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:49:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:41,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 08:49:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:41,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 08:49:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:41,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 08:49:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:49:41,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969089390] [2022-01-31 08:49:41,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969089390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567138257] [2022-01-31 08:49:41,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:49:41,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:41,118 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 08:49:41,147 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 08:49:41,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 08:49:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:41,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 08:49:41,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:49:42,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:49:42,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567138257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:42,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:42,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-01-31 08:49:42,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906603526] [2022-01-31 08:49:42,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:42,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 08:49:42,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:42,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 08:49:42,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-01-31 08:49:42,431 INFO L87 Difference]: Start difference. First operand 207 states and 226 transitions. Second operand has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 30 states have internal predecessors, (151), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 08:49:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:42,925 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2022-01-31 08:49:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 08:49:42,925 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 30 states have internal predecessors, (151), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 80 [2022-01-31 08:49:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:42,928 INFO L225 Difference]: With dead ends: 247 [2022-01-31 08:49:42,928 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 08:49:42,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 08:49:42,934 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 358 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:42,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 111 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:49:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 08:49:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 172. [2022-01-31 08:49:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 151 states have (on average 1.0927152317880795) internal successors, (165), 153 states have internal predecessors, (165), 13 states have call successors, (13), 9 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 08:49:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 190 transitions. [2022-01-31 08:49:42,946 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 190 transitions. Word has length 80 [2022-01-31 08:49:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:42,947 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 190 transitions. [2022-01-31 08:49:42,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 30 states have internal predecessors, (151), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 08:49:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 190 transitions. [2022-01-31 08:49:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 08:49:42,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:42,952 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:42,959 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 08:49:43,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:43,157 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1217132036, now seen corresponding path program 6 times [2022-01-31 08:49:43,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:43,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027174303] [2022-01-31 08:49:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:43,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:43,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:43,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:43,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 08:49:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:43,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 08:49:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:43,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 08:49:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 08:49:43,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027174303] [2022-01-31 08:49:43,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027174303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539587632] [2022-01-31 08:49:43,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:49:43,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:43,324 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 08:49:43,332 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 08:49:43,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 08:49:43,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:49:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-31 08:49:44,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 08:49:44,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539587632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:44,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:44,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 08:49:44,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628941495] [2022-01-31 08:49:44,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:44,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:49:44,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:49:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:49:44,288 INFO L87 Difference]: Start difference. First operand 172 states and 190 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:49:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:44,616 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-01-31 08:49:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:49:44,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 91 [2022-01-31 08:49:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:44,617 INFO L225 Difference]: With dead ends: 292 [2022-01-31 08:49:44,617 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 08:49:44,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-31 08:49:44,618 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 181 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:44,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 89 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:49:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 08:49:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 266. [2022-01-31 08:49:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 235 states have (on average 1.0851063829787233) internal successors, (255), 239 states have internal predecessors, (255), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 08:49:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 292 transitions. [2022-01-31 08:49:44,623 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 292 transitions. Word has length 91 [2022-01-31 08:49:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:44,623 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 292 transitions. [2022-01-31 08:49:44,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:49:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 292 transitions. [2022-01-31 08:49:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 08:49:44,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:44,625 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:44,649 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 08:49:44,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:44,836 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash -389726266, now seen corresponding path program 7 times [2022-01-31 08:49:44,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:44,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104034054] [2022-01-31 08:49:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:44,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 08:49:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 08:49:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 08:49:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 08:49:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-31 08:49:45,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104034054] [2022-01-31 08:49:45,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104034054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134131299] [2022-01-31 08:49:45,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:49:45,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:45,108 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 08:49:45,124 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 08:49:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:45,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 08:49:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:45,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:45,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2022-01-31 08:49:45,437 INFO L353 Elim1Store]: treesize reduction 620, result has 9.0 percent of original size [2022-01-31 08:49:45,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 127 treesize of output 124 [2022-01-31 08:49:45,463 INFO L353 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2022-01-31 08:49:45,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 52 [2022-01-31 08:49:45,498 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:49:45,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:45,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 66 [2022-01-31 08:49:45,563 INFO L353 Elim1Store]: treesize reduction 542, result has 9.2 percent of original size [2022-01-31 08:49:45,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 124 treesize of output 118 [2022-01-31 08:49:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:45,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:45,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:45,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 31 [2022-01-31 08:49:51,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:49:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 08:49:51,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:54,565 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_155 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_155)) (forall ((v_ArrVal_1183 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) |c_main_~#volArray~0.offset| (* 16 v_main_~i~0_155)) v_ArrVal_1183) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) is different from false [2022-01-31 08:49:56,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2022-01-31 08:49:56,450 INFO L353 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-01-31 08:49:56,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164328 treesize of output 152424