/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:07:39,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:07:39,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:07:39,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:07:39,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:07:39,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:07:39,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:07:39,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:07:39,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:07:39,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:07:39,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:07:39,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:07:39,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:07:39,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:07:39,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:07:39,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:07:39,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:07:39,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:07:39,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:07:39,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:07:39,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:07:39,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:07:39,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:07:39,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:07:39,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:07:39,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:07:39,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:07:39,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:07:39,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:07:39,119 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:07:39,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:07:39,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:07:39,120 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:07:39,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:07:39,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:07:39,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:07:39,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:07:39,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:07:39,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:07:39,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:07:39,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:07:39,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:07:39,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:07:39,123 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:07:39,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:07:39,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:07:39,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:07:39,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:07:39,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:07:39,367 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:07:39,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2022-01-31 08:07:39,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9d2851c/bb566bf1c2f4401da788af0611bf204b/FLAG5f626212d [2022-01-31 08:07:39,794 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:07:39,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2022-01-31 08:07:39,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9d2851c/bb566bf1c2f4401da788af0611bf204b/FLAG5f626212d [2022-01-31 08:07:39,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9d2851c/bb566bf1c2f4401da788af0611bf204b [2022-01-31 08:07:39,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:07:39,814 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:07:39,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:07:39,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:07:39,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:07:39,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:07:39" (1/1) ... [2022-01-31 08:07:39,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c336d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:39, skipping insertion in model container [2022-01-31 08:07:39,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:07:39" (1/1) ... [2022-01-31 08:07:39,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:07:39,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:07:39,983 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel-2.i[852,865] [2022-01-31 08:07:39,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:07:40,012 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:07:40,025 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel-2.i[852,865] [2022-01-31 08:07:40,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:07:40,041 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:07:40,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40 WrapperNode [2022-01-31 08:07:40,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:07:40,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:07:40,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:07:40,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:07:40,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:07:40,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:07:40,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:07:40,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:07:40,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:07:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:40,120 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 08:07:40,124 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 08:07:40,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:07:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:07:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:07:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:07:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:07:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:07:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:07:40,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:07:40,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:07:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:07:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:07:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:07:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:07:40,208 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:07:40,209 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:07:40,299 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:07:40,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:07:40,305 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:07:40,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:40 BoogieIcfgContainer [2022-01-31 08:07:40,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:07:40,307 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:07:40,307 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:07:40,308 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:07:40,311 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:40" (1/1) ... [2022-01-31 08:07:40,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:07:40 BasicIcfg [2022-01-31 08:07:40,326 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:07:40,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:07:40,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:07:40,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:07:40,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:07:39" (1/4) ... [2022-01-31 08:07:40,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bb371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:07:40, skipping insertion in model container [2022-01-31 08:07:40,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:40" (2/4) ... [2022-01-31 08:07:40,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bb371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:07:40, skipping insertion in model container [2022-01-31 08:07:40,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:40" (3/4) ... [2022-01-31 08:07:40,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bb371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:07:40, skipping insertion in model container [2022-01-31 08:07:40,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:07:40" (4/4) ... [2022-01-31 08:07:40,333 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.iJordan [2022-01-31 08:07:40,338 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:07:40,339 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:07:40,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:07:40,414 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 08:07:40,415 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:07:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:07:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:07:40,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:40,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:40,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1960105654, now seen corresponding path program 1 times [2022-01-31 08:07:40,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:40,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118043075] [2022-01-31 08:07:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:40,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:40,653 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 08:07:40,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:40,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118043075] [2022-01-31 08:07:40,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118043075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:40,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:40,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:07:40,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158928410] [2022-01-31 08:07:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:40,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:07:40,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:07:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:07:40,698 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:40,754 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-01-31 08:07:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:07:40,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:07:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:40,763 INFO L225 Difference]: With dead ends: 23 [2022-01-31 08:07:40,763 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 08:07:40,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:07:40,778 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:40,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:40,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 08:07:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 08:07:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-31 08:07:40,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2022-01-31 08:07:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:40,812 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-31 08:07:40,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-31 08:07:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 08:07:40,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:40,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:40,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:07:40,814 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1888991259, now seen corresponding path program 1 times [2022-01-31 08:07:40,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490689672] [2022-01-31 08:07:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:40,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:40,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:40,939 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 08:07:40,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:40,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490689672] [2022-01-31 08:07:40,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490689672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:40,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:40,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:07:40,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444816220] [2022-01-31 08:07:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:40,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:07:40,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:07:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:07:40,942 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:40,996 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-01-31 08:07:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:07:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 08:07:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:40,997 INFO L225 Difference]: With dead ends: 18 [2022-01-31 08:07:40,997 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 08:07:41,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:07:41,002 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:41,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 08:07:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-01-31 08:07:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-01-31 08:07:41,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-01-31 08:07:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:41,007 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-01-31 08:07:41,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-01-31 08:07:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 08:07:41,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:41,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:41,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:07:41,008 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1910552696, now seen corresponding path program 1 times [2022-01-31 08:07:41,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:41,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076025872] [2022-01-31 08:07:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:41,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:41,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:41,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:41,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076025872] [2022-01-31 08:07:41,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076025872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:41,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473637294] [2022-01-31 08:07:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:41,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:41,080 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 08:07:41,081 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 08:07:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:07:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:41,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:41,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473637294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:41,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:41,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:07:41,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406015048] [2022-01-31 08:07:41,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:41,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:07:41,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:07:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:07:41,315 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:41,388 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-01-31 08:07:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:07:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 08:07:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:41,389 INFO L225 Difference]: With dead ends: 23 [2022-01-31 08:07:41,389 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 08:07:41,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:07:41,391 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:41,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 08:07:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 08:07:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-01-31 08:07:41,395 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2022-01-31 08:07:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:41,395 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-01-31 08:07:41,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-01-31 08:07:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:07:41,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:41,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:41,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:41,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:41,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:41,602 INFO L85 PathProgramCache]: Analyzing trace with hash 587258353, now seen corresponding path program 2 times [2022-01-31 08:07:41,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:41,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257672019] [2022-01-31 08:07:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:41,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:07:41,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257672019] [2022-01-31 08:07:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257672019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:41,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:41,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:07:41,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891528791] [2022-01-31 08:07:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:41,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:07:41,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:07:41,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:41,744 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:41,814 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-31 08:07:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:07:41,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 08:07:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:41,817 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:07:41,817 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 08:07:41,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:07:41,824 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:41,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 08:07:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 08:07:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-01-31 08:07:41,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-01-31 08:07:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:41,834 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-01-31 08:07:41,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-01-31 08:07:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 08:07:41,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:41,835 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:41,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:07:41,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1753080139, now seen corresponding path program 1 times [2022-01-31 08:07:41,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:41,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780883909] [2022-01-31 08:07:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:41,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:41,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780883909] [2022-01-31 08:07:41,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780883909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701047973] [2022-01-31 08:07:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:41,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:41,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:41,960 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 08:07:41,983 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 08:07:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:07:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:42,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:42,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701047973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:42,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:42,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:07:42,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992312530] [2022-01-31 08:07:42,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:42,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:07:42,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:07:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:07:42,175 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:42,311 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-31 08:07:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:07:42,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 08:07:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:42,312 INFO L225 Difference]: With dead ends: 37 [2022-01-31 08:07:42,312 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 08:07:42,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:07:42,313 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:42,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 08:07:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 08:07:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-01-31 08:07:42,317 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2022-01-31 08:07:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:42,317 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-01-31 08:07:42,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-01-31 08:07:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 08:07:42,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:42,319 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:42,346 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 08:07:42,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:42,532 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2021925177, now seen corresponding path program 2 times [2022-01-31 08:07:42,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158460485] [2022-01-31 08:07:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:42,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:42,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:42,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:42,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158460485] [2022-01-31 08:07:42,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158460485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:42,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898718676] [2022-01-31 08:07:42,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:07:42,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:42,720 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 08:07:42,721 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 08:07:42,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:07:42,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:07:42,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:42,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:43,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898718676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:43,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:43,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:07:43,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701955576] [2022-01-31 08:07:43,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:43,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:07:43,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:07:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:07:43,153 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:43,567 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-01-31 08:07:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:07:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 08:07:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:43,569 INFO L225 Difference]: With dead ends: 61 [2022-01-31 08:07:43,569 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 08:07:43,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:07:43,571 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:43,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 37 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:07:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 08:07:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 08:07:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-01-31 08:07:43,577 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 36 [2022-01-31 08:07:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:43,577 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-01-31 08:07:43,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-01-31 08:07:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 08:07:43,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:43,578 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:43,596 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 08:07:43,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:43,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:43,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1372897813, now seen corresponding path program 3 times [2022-01-31 08:07:43,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:43,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441911918] [2022-01-31 08:07:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:43,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:44,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:44,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441911918] [2022-01-31 08:07:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441911918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422737393] [2022-01-31 08:07:44,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:07:44,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:44,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:44,159 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 08:07:44,179 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 08:07:44,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 08:07:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:07:44,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:44,353 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 15 treesize of output 11 [2022-01-31 08:07:44,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:07:44,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-31 08:07:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 08:07:44,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:44,682 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 18 treesize of output 16 [2022-01-31 08:07:44,687 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 28 [2022-01-31 08:07:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 08:07:44,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422737393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:44,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:44,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 7, 7] total 34 [2022-01-31 08:07:44,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242050396] [2022-01-31 08:07:44,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:44,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 08:07:44,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 08:07:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 08:07:44,753 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:45,411 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2022-01-31 08:07:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 08:07:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 08:07:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:45,414 INFO L225 Difference]: With dead ends: 69 [2022-01-31 08:07:45,414 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 08:07:45,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=957, Invalid=2825, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 08:07:45,416 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:45,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 62 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 148 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-01-31 08:07:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 08:07:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 08:07:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-01-31 08:07:45,421 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2022-01-31 08:07:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:45,421 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-01-31 08:07:45,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-01-31 08:07:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 08:07:45,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:45,422 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:45,450 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 08:07:45,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:45,623 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1096645074, now seen corresponding path program 4 times [2022-01-31 08:07:45,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:45,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45659084] [2022-01-31 08:07:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:45,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:46,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:07:46,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45659084] [2022-01-31 08:07:46,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45659084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854741155] [2022-01-31 08:07:46,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:07:46,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:46,029 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 08:07:46,055 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 08:07:46,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:07:46,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:46,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 08:07:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:07:46,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:07:47,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854741155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:47,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:47,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-01-31 08:07:47,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045396373] [2022-01-31 08:07:47,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:47,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 08:07:47,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 08:07:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 08:07:47,065 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:48,282 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2022-01-31 08:07:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 08:07:48,283 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 08:07:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:48,284 INFO L225 Difference]: With dead ends: 115 [2022-01-31 08:07:48,284 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 08:07:48,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 08:07:48,288 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:48,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 32 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:07:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 08:07:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-01-31 08:07:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-01-31 08:07:48,310 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 64 [2022-01-31 08:07:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:48,311 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-01-31 08:07:48,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-01-31 08:07:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 08:07:48,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:48,314 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:48,339 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 08:07:48,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:48,515 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1630801661, now seen corresponding path program 5 times [2022-01-31 08:07:48,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:48,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174013243] [2022-01-31 08:07:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:48,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:49,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:07:49,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:49,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174013243] [2022-01-31 08:07:49,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174013243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:49,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910982129] [2022-01-31 08:07:49,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:07:49,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:49,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:49,532 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 08:07:49,562 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 08:08:27,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-01-31 08:08:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 08:08:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:27,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:30,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910982129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:30,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:30,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-01-31 08:08:30,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791400861] [2022-01-31 08:08:30,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:30,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 08:08:30,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:30,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 08:08:30,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 08:08:30,552 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:34,086 INFO L93 Difference]: Finished difference Result 215 states and 216 transitions. [2022-01-31 08:08:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 08:08:34,087 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 08:08:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:34,089 INFO L225 Difference]: With dead ends: 215 [2022-01-31 08:08:34,089 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 08:08:34,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 08:08:34,098 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 255 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:34,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 42 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:08:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 08:08:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-01-31 08:08:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2022-01-31 08:08:34,107 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 114 [2022-01-31 08:08:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:34,107 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2022-01-31 08:08:34,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2022-01-31 08:08:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 08:08:34,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:34,110 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:34,163 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 08:08:34,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:34,336 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash 887564051, now seen corresponding path program 6 times [2022-01-31 08:08:34,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:34,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011275998] [2022-01-31 08:08:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:34,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:37,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:08:37,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011275998] [2022-01-31 08:08:37,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011275998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549887204] [2022-01-31 08:08:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:08:37,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:37,737 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 08:08:37,737 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 08:08:37,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 08:08:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 08:08:37,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:38,129 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 15 treesize of output 11 [2022-01-31 08:08:38,347 INFO L353 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-01-31 08:08:38,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 39 [2022-01-31 08:08:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-01-31 08:08:38,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-01-31 08:08:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549887204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:39,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:39,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 9, 9] total 114 [2022-01-31 08:08:39,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409752772] [2022-01-31 08:08:39,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:39,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 08:08:39,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 08:08:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5094, Invalid=7788, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 08:08:39,257 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 112 states have internal predecessors, (228), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:44,256 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2022-01-31 08:08:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 08:08:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 112 states have internal predecessors, (228), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 08:08:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:44,258 INFO L225 Difference]: With dead ends: 226 [2022-01-31 08:08:44,258 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 08:08:44,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7387 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15267, Invalid=33795, Unknown=0, NotChecked=0, Total=49062 [2022-01-31 08:08:44,262 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 221 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:44,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 50 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 292 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-01-31 08:08:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 08:08:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2022-01-31 08:08:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2022-01-31 08:08:44,271 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 214 [2022-01-31 08:08:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:44,271 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2022-01-31 08:08:44,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 112 states have internal predecessors, (228), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2022-01-31 08:08:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 08:08:44,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:44,274 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:44,295 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 08:08:44,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:44,488 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash 658115006, now seen corresponding path program 7 times [2022-01-31 08:08:44,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306825841] [2022-01-31 08:08:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:44,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:47,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:08:47,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306825841] [2022-01-31 08:08:47,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306825841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375332548] [2022-01-31 08:08:47,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:08:47,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:47,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:47,999 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 08:08:47,999 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 08:08:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-31 08:08:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:08:48,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:08:58,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375332548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:58,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:58,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-01-31 08:08:58,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768828937] [2022-01-31 08:08:58,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:58,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-01-31 08:08:58,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:58,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-01-31 08:08:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 08:08:58,009 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:09:11,258 INFO L93 Difference]: Finished difference Result 423 states and 424 transitions. [2022-01-31 08:09:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-31 08:09:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2022-01-31 08:09:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:09:11,260 INFO L225 Difference]: With dead ends: 423 [2022-01-31 08:09:11,260 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 08:09:11,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2022-01-31 08:09:11,269 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 410 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:09:11,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 42 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:09:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 08:09:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2022-01-31 08:09:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 418 states have (on average 1.0047846889952152) internal successors, (420), 418 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 424 transitions. [2022-01-31 08:09:11,280 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 424 transitions. Word has length 220 [2022-01-31 08:09:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:09:11,281 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 424 transitions. [2022-01-31 08:09:11,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 424 transitions. [2022-01-31 08:09:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 08:09:11,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:09:11,289 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:09:11,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:09:11,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 08:09:11,504 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:09:11,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:09:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash 644014925, now seen corresponding path program 8 times [2022-01-31 08:09:11,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:09:11,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129448912] [2022-01-31 08:09:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:09:11,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:09:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:24,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:09:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:09:24,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:09:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129448912] [2022-01-31 08:09:24,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129448912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:09:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367767592] [2022-01-31 08:09:24,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:09:24,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:09:24,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:09:24,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:09:24,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:09:24,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:09:24,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:09:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 202 conjunts are in the unsatisfiable core [2022-01-31 08:09:24,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:09:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:09:25,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:10:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:10:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367767592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:10:01,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:10:01,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [204, 203, 203] total 406 [2022-01-31 08:10:01,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823741390] [2022-01-31 08:10:01,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:10:01,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 406 states [2022-01-31 08:10:01,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:10:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 406 interpolants. [2022-01-31 08:10:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81812, Invalid=82618, Unknown=0, NotChecked=0, Total=164430 [2022-01-31 08:10:01,890 INFO L87 Difference]: Start difference. First operand 423 states and 424 transitions. Second operand has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:10:55,035 INFO L93 Difference]: Finished difference Result 827 states and 828 transitions. [2022-01-31 08:10:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2022-01-31 08:10:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 422 [2022-01-31 08:10:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:10:55,038 INFO L225 Difference]: With dead ends: 827 [2022-01-31 08:10:55,038 INFO L226 Difference]: Without dead ends: 827 [2022-01-31 08:10:55,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101901 ImplicationChecksByTransitivity, 96.9s TimeCoverageRelationStatistics Valid=244623, Invalid=407433, Unknown=0, NotChecked=0, Total=652056 [2022-01-31 08:10:55,075 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1015 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 08:10:55,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 47 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 08:10:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-31 08:10:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-01-31 08:10:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 822 states have (on average 1.002433090024331) internal successors, (824), 822 states have internal predecessors, (824), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 828 transitions. [2022-01-31 08:10:55,091 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 828 transitions. Word has length 422 [2022-01-31 08:10:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:10:55,091 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 828 transitions. [2022-01-31 08:10:55,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 828 transitions. [2022-01-31 08:10:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2022-01-31 08:10:55,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:10:55,108 INFO L514 BasicCegarLoop]: trace histogram [402, 402, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:10:55,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:10:55,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:10:55,328 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:10:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:10:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash 282729003, now seen corresponding path program 9 times [2022-01-31 08:10:55,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:10:55,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053607827] [2022-01-31 08:10:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:10:55,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:10:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:11:45,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:11:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:11:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:11:45,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:11:45,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053607827] [2022-01-31 08:11:45,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053607827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:11:45,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288492882] [2022-01-31 08:11:45,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:11:45,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:11:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:11:45,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:11:45,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:11:45,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 08:11:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:11:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 08:11:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:11:46,588 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 15 treesize of output 11 [2022-01-31 08:11:48,201 INFO L353 Elim1Store]: treesize reduction 68, result has 47.3 percent of original size [2022-01-31 08:11:48,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 79 [2022-01-31 08:11:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-01-31 08:11:49,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:11:51,265 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 65 treesize of output 57 [2022-01-31 08:11:51,271 INFO L353 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-01-31 08:11:51,271 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 109 treesize of output 1 [2022-01-31 08:11:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-01-31 08:11:51,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288492882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:11:51,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:11:51,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 13, 13] total 426 [2022-01-31 08:11:51,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856715477] [2022-01-31 08:11:51,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:11:51,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 426 states [2022-01-31 08:11:51,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:11:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 426 interpolants. [2022-01-31 08:11:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81908, Invalid=99142, Unknown=0, NotChecked=0, Total=181050 [2022-01-31 08:11:52,014 INFO L87 Difference]: Start difference. First operand 827 states and 828 transitions. Second operand has 426 states, 426 states have (on average 1.9812206572769953) internal successors, (844), 424 states have internal predecessors, (844), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:13:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:13:00,119 INFO L93 Difference]: Finished difference Result 843 states and 847 transitions. [2022-01-31 08:13:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 425 states. [2022-01-31 08:13:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 426 states, 426 states have (on average 1.9812206572769953) internal successors, (844), 424 states have internal predecessors, (844), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 826 [2022-01-31 08:13:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:13:00,123 INFO L225 Difference]: With dead ends: 843 [2022-01-31 08:13:00,124 INFO L226 Difference]: Without dead ends: 838 [2022-01-31 08:13:00,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2478 GetRequests, 1633 SyntacticMatches, 1 SemanticMatches, 844 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98621 ImplicationChecksByTransitivity, 115.7s TimeCoverageRelationStatistics Valid=245738, Invalid=469132, Unknown=0, NotChecked=0, Total=714870 [2022-01-31 08:13:00,160 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 845 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:13:00,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 125 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1041 Invalid, 0 Unknown, 172 Unchecked, 1.0s Time] [2022-01-31 08:13:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-31 08:13:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 837. [2022-01-31 08:13:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 832 states have (on average 1.0024038461538463) internal successors, (834), 832 states have internal predecessors, (834), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:13:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 838 transitions. [2022-01-31 08:13:00,173 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 838 transitions. Word has length 826 [2022-01-31 08:13:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:13:00,174 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 838 transitions. [2022-01-31 08:13:00,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 426 states, 426 states have (on average 1.9812206572769953) internal successors, (844), 424 states have internal predecessors, (844), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:13:00,175 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 838 transitions. [2022-01-31 08:13:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2022-01-31 08:13:00,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:13:00,181 INFO L514 BasicCegarLoop]: trace histogram [403, 403, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:13:00,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 08:13:00,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:13:00,382 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:13:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:13:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash -21892770, now seen corresponding path program 10 times [2022-01-31 08:13:00,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:13:00,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254338377] [2022-01-31 08:13:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:13:00,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:13:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:50,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:13:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 162481 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-31 08:13:50,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:13:50,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254338377] [2022-01-31 08:13:50,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254338377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:13:50,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417878529] [2022-01-31 08:13:50,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:13:50,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:13:50,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:13:50,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:13:50,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:13:51,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:13:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:13:51,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 3750 conjuncts, 405 conjunts are in the unsatisfiable core [2022-01-31 08:13:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:13:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 162481 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-31 08:13:53,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:16:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 162481 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-31 08:16:22,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417878529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:16:22,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:16:22,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [407, 406, 406] total 812 [2022-01-31 08:16:22,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663777748] [2022-01-31 08:16:22,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:16:22,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 812 states [2022-01-31 08:16:22,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:16:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 812 interpolants. [2022-01-31 08:16:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328457, Invalid=330075, Unknown=0, NotChecked=0, Total=658532 [2022-01-31 08:16:22,471 INFO L87 Difference]: Start difference. First operand 837 states and 838 transitions. Second operand has 812 states, 812 states have (on average 2.0061576354679804) internal successors, (1629), 811 states have internal predecessors, (1629), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)