/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-tiling/pr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:04:48,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:04:48,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:04:48,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:04:48,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:04:48,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:04:48,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:04:48,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:04:48,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:04:48,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:04:48,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:04:48,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:04:48,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:04:48,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:04:48,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:04:48,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:04:48,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:04:48,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:04:48,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:04:48,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:04:48,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:04:48,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:04:48,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:04:48,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:04:48,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:04:48,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:04:48,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:04:48,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:04:48,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:04:48,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:04:48,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:04:48,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:04:48,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:04:48,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:04:48,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:04:48,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:04:48,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:04:48,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:04:48,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:04:48,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:04:48,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:04:48,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:04:48,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:04:48,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:04:48,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:04:48,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:04:48,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:04:48,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:04:48,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:04:48,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:04:48,299 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:04:48,299 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:04:48,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:04:48,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:04:48,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:04:48,517 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:04:48,518 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:04:48,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr5.c [2022-01-31 09:04:48,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbc541cc2/ecf5b4824df94956852fd59db17b8e04/FLAG61f3e3a5d [2022-01-31 09:04:48,915 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:04:48,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr5.c [2022-01-31 09:04:48,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbc541cc2/ecf5b4824df94956852fd59db17b8e04/FLAG61f3e3a5d [2022-01-31 09:04:48,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbc541cc2/ecf5b4824df94956852fd59db17b8e04 [2022-01-31 09:04:48,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:04:48,939 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:04:48,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:04:48,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:04:48,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:04:48,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:04:48" (1/1) ... [2022-01-31 09:04:48,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5419c6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:48, skipping insertion in model container [2022-01-31 09:04:48,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:04:48" (1/1) ... [2022-01-31 09:04:48,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:04:48,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:04:49,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr5.c[394,407] [2022-01-31 09:04:49,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:04:49,133 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:04:49,143 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr5.c[394,407] [2022-01-31 09:04:49,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:04:49,163 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:04:49,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49 WrapperNode [2022-01-31 09:04:49,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:04:49,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:04:49,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:04:49,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:04:49,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:04:49,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:04:49,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:04:49,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:04:49,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:04:49,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:49,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 09:04:49,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 09:04:49,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:04:49,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:04:49,297 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:04:49,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:04:49,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:04:49,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:04:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:04:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:04:49,299 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:04:49,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:04:49,299 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:04:49,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:04:49,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:04:49,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:04:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:04:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:04:49,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:04:49,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:04:49,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:04:49,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:04:49,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:04:49,367 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:04:49,368 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:04:49,535 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:04:49,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:04:49,541 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:04:49,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:04:49 BoogieIcfgContainer [2022-01-31 09:04:49,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:04:49,543 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:04:49,543 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:04:49,544 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:04:49,547 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:04:49" (1/1) ... [2022-01-31 09:04:49,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:04:49 BasicIcfg [2022-01-31 09:04:49,571 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:04:49,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:04:49,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:04:49,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:04:49,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:04:48" (1/4) ... [2022-01-31 09:04:49,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6268dc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:04:49, skipping insertion in model container [2022-01-31 09:04:49,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:04:49" (2/4) ... [2022-01-31 09:04:49,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6268dc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:04:49, skipping insertion in model container [2022-01-31 09:04:49,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:04:49" (3/4) ... [2022-01-31 09:04:49,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6268dc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:04:49, skipping insertion in model container [2022-01-31 09:04:49,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:04:49" (4/4) ... [2022-01-31 09:04:49,577 INFO L111 eAbstractionObserver]: Analyzing ICFG pr5.cJordan [2022-01-31 09:04:49,581 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:04:49,582 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:04:49,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:04:49,632 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:04:49,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:04:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:04:49,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:49,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:49,652 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1031291974, now seen corresponding path program 1 times [2022-01-31 09:04:49,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:49,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464382272] [2022-01-31 09:04:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:49,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:49,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:49,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464382272] [2022-01-31 09:04:49,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464382272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:49,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:49,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:04:49,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874842587] [2022-01-31 09:04:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:49,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:04:49,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:04:49,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:04:49,968 INFO L87 Difference]: Start difference. First operand has 39 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:50,050 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-01-31 09:04:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:04:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:04:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:50,071 INFO L225 Difference]: With dead ends: 39 [2022-01-31 09:04:50,071 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 09:04:50,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:04:50,078 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:50,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 09:04:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 09:04:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:04:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-01-31 09:04:50,111 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-01-31 09:04:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:50,112 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-01-31 09:04:50,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-01-31 09:04:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:04:50,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:50,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:04:50,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1391782268, now seen corresponding path program 1 times [2022-01-31 09:04:50,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:50,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041710386] [2022-01-31 09:04:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:50,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:50,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:50,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041710386] [2022-01-31 09:04:50,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041710386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:50,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:50,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:04:50,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997276999] [2022-01-31 09:04:50,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:50,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:04:50,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:04:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:04:50,251 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:50,347 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-01-31 09:04:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:04:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:04:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:50,348 INFO L225 Difference]: With dead ends: 39 [2022-01-31 09:04:50,349 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 09:04:50,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:04:50,351 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:50,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 122 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 09:04:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-01-31 09:04:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-01-31 09:04:50,357 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 22 [2022-01-31 09:04:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:50,358 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-01-31 09:04:50,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-01-31 09:04:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:04:50,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:50,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:50,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:04:50,359 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1390858747, now seen corresponding path program 1 times [2022-01-31 09:04:50,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:50,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588699251] [2022-01-31 09:04:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:50,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:50,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:50,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588699251] [2022-01-31 09:04:50,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588699251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:50,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:50,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:04:50,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091977042] [2022-01-31 09:04:50,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:50,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:04:50,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:50,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:04:50,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:04:50,523 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:50,620 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-01-31 09:04:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:04:50,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 09:04:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:50,624 INFO L225 Difference]: With dead ends: 45 [2022-01-31 09:04:50,625 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 09:04:50,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:04:50,630 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:50,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 31 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 09:04:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-31 09:04:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-01-31 09:04:50,643 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2022-01-31 09:04:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:50,643 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-01-31 09:04:50,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-01-31 09:04:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 09:04:50,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:50,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:50,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:04:50,645 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1493835468, now seen corresponding path program 1 times [2022-01-31 09:04:50,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:50,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635588886] [2022-01-31 09:04:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:50,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:51,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635588886] [2022-01-31 09:04:51,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635588886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673208789] [2022-01-31 09:04:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:51,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:51,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:51,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:51,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:04:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 09:04:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:51,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:51,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:51,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:51,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:51,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:51,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:04:51,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:04:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:51,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:51,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-01-31 09:04:51,673 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 24 treesize of output 22 [2022-01-31 09:04:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:51,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673208789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:51,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:51,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2022-01-31 09:04:51,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149999748] [2022-01-31 09:04:51,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:51,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:04:51,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:04:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:04:51,725 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:04:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:52,551 INFO L93 Difference]: Finished difference Result 115 states and 161 transitions. [2022-01-31 09:04:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 09:04:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-01-31 09:04:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:52,553 INFO L225 Difference]: With dead ends: 115 [2022-01-31 09:04:52,553 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 09:04:52,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:04:52,554 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 146 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:52,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 169 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:04:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 09:04:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 61. [2022-01-31 09:04:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 52 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-01-31 09:04:52,565 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 29 [2022-01-31 09:04:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:52,565 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-01-31 09:04:52,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:04:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-01-31 09:04:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 09:04:52,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:52,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:52,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 09:04:52,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:52,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash 988276843, now seen corresponding path program 1 times [2022-01-31 09:04:52,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:52,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204730712] [2022-01-31 09:04:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:52,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:52,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:52,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204730712] [2022-01-31 09:04:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204730712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:52,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:52,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:04:52,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758441501] [2022-01-31 09:04:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:52,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:04:52,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:04:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:04:52,836 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:52,927 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-01-31 09:04:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:04:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-01-31 09:04:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:52,928 INFO L225 Difference]: With dead ends: 67 [2022-01-31 09:04:52,928 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:04:52,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:04:52,929 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:52,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 73 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:04:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2022-01-31 09:04:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.411764705882353) internal successors, (72), 52 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2022-01-31 09:04:52,935 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 29 [2022-01-31 09:04:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:52,935 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2022-01-31 09:04:52,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:04:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2022-01-31 09:04:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 09:04:52,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:52,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:52,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 09:04:52,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash 791763338, now seen corresponding path program 1 times [2022-01-31 09:04:52,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:52,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587500682] [2022-01-31 09:04:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:52,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:53,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:53,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:53,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587500682] [2022-01-31 09:04:53,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587500682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541684313] [2022-01-31 09:04:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:53,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:53,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:53,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:53,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:04:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 09:04:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:53,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:53,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:53,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:53,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:53,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:53,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-01-31 09:04:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:53,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:53,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-01-31 09:04:53,509 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 24 treesize of output 22 [2022-01-31 09:04:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541684313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:53,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:53,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2022-01-31 09:04:53,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058359451] [2022-01-31 09:04:53,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:53,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 09:04:53,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 09:04:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:04:53,546 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:53,966 INFO L93 Difference]: Finished difference Result 110 states and 150 transitions. [2022-01-31 09:04:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:04:53,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-01-31 09:04:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:53,967 INFO L225 Difference]: With dead ends: 110 [2022-01-31 09:04:53,968 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 09:04:53,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:04:53,969 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:53,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 185 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:04:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 09:04:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2022-01-31 09:04:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 62 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-01-31 09:04:53,978 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 29 [2022-01-31 09:04:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:53,979 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-01-31 09:04:53,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-01-31 09:04:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 09:04:53,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:53,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:54,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:54,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 09:04:54,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1611016420, now seen corresponding path program 1 times [2022-01-31 09:04:54,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:54,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027236416] [2022-01-31 09:04:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:54,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:54,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:54,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027236416] [2022-01-31 09:04:54,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027236416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:54,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:54,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:04:54,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137529126] [2022-01-31 09:04:54,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:54,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:04:54,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:04:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:54,243 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:54,295 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2022-01-31 09:04:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:04:54,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-01-31 09:04:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:54,297 INFO L225 Difference]: With dead ends: 69 [2022-01-31 09:04:54,298 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 09:04:54,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:54,298 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:54,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 53 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:04:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 09:04:54,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2022-01-31 09:04:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 54 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:04:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-01-31 09:04:54,313 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 36 [2022-01-31 09:04:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:54,313 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-01-31 09:04:54,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:04:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-01-31 09:04:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 09:04:54,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:54,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:54,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 09:04:54,315 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -401485399, now seen corresponding path program 1 times [2022-01-31 09:04:54,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171038626] [2022-01-31 09:04:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:04:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:54,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:54,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171038626] [2022-01-31 09:04:54,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171038626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:54,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101876328] [2022-01-31 09:04:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:54,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:54,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:54,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:54,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:04:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 09:04:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:54,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:54,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:54,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:54,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:54,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:54,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:04:55,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:04:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:55,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:55,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:04:55,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 09:04:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101876328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:55,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:55,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2022-01-31 09:04:55,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13200353] [2022-01-31 09:04:55,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:55,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 09:04:55,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 09:04:55,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:04:55,858 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:04:57,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:57,353 INFO L93 Difference]: Finished difference Result 189 states and 254 transitions. [2022-01-31 09:04:57,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 09:04:57,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 38 [2022-01-31 09:04:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:57,355 INFO L225 Difference]: With dead ends: 189 [2022-01-31 09:04:57,355 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 09:04:57,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 09:04:57,357 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 297 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:57,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 215 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 767 Invalid, 0 Unknown, 91 Unchecked, 0.6s Time] [2022-01-31 09:04:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 09:04:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 83. [2022-01-31 09:04:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:04:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2022-01-31 09:04:57,365 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 38 [2022-01-31 09:04:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:57,366 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2022-01-31 09:04:57,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:04:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2022-01-31 09:04:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 09:04:57,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:57,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:57,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:57,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:57,584 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2039249078, now seen corresponding path program 1 times [2022-01-31 09:04:57,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:57,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459838554] [2022-01-31 09:04:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:57,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:04:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:04:57,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:57,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459838554] [2022-01-31 09:04:57,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459838554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:57,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:57,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:04:57,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582926023] [2022-01-31 09:04:57,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:04:57,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:04:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:04:57,663 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:04:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:57,730 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2022-01-31 09:04:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:04:57,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-01-31 09:04:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:57,731 INFO L225 Difference]: With dead ends: 89 [2022-01-31 09:04:57,731 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 09:04:57,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:04:57,732 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:57,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 74 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 09:04:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2022-01-31 09:04:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 70 states have (on average 1.3) internal successors, (91), 72 states have internal predecessors, (91), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:04:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2022-01-31 09:04:57,736 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 38 [2022-01-31 09:04:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:57,737 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2022-01-31 09:04:57,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:04:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2022-01-31 09:04:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 09:04:57,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:57,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 09:04:57,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1846893993, now seen corresponding path program 1 times [2022-01-31 09:04:57,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:57,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933652924] [2022-01-31 09:04:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:57,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:04:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:57,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:57,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933652924] [2022-01-31 09:04:57,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933652924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:57,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996723073] [2022-01-31 09:04:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:57,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:57,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:57,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:57,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:04:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:57,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 09:04:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:58,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:58,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:58,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:58,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:58,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:04:58,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:04:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:58,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:58,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:04:58,354 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 30 treesize of output 26 [2022-01-31 09:04:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:04:58,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996723073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:58,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:58,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-31 09:04:58,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511799871] [2022-01-31 09:04:58,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:58,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:04:58,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:04:58,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:04:58,397 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:04:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:58,975 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2022-01-31 09:04:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:04:58,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-01-31 09:04:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:58,976 INFO L225 Difference]: With dead ends: 174 [2022-01-31 09:04:58,976 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 09:04:58,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 09:04:58,977 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:58,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 245 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 788 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2022-01-31 09:04:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 09:04:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2022-01-31 09:04:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 94 states have internal predecessors, (117), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:04:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2022-01-31 09:04:58,984 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 38 [2022-01-31 09:04:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:58,984 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2022-01-31 09:04:58,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:04:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2022-01-31 09:04:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 09:04:58,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:58,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:59,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:59,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 817356590, now seen corresponding path program 1 times [2022-01-31 09:04:59,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816229713] [2022-01-31 09:04:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:59,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:04:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:04:59,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:59,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816229713] [2022-01-31 09:04:59,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816229713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:04:59,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:04:59,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:04:59,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842266133] [2022-01-31 09:04:59,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:04:59,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:04:59,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:59,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:04:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:59,247 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:59,301 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-01-31 09:04:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:04:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-01-31 09:04:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:59,304 INFO L225 Difference]: With dead ends: 104 [2022-01-31 09:04:59,304 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 09:04:59,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:04:59,305 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:59,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 54 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:04:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 09:04:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-01-31 09:04:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.271604938271605) internal successors, (103), 84 states have internal predecessors, (103), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:04:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2022-01-31 09:04:59,313 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 45 [2022-01-31 09:04:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:59,313 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2022-01-31 09:04:59,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:04:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2022-01-31 09:04:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 09:04:59,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:59,314 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:59,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 09:04:59,315 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1157171052, now seen corresponding path program 2 times [2022-01-31 09:04:59,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:59,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660752647] [2022-01-31 09:04:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:59,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:04:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:04:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:59,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660752647] [2022-01-31 09:04:59,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660752647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731412914] [2022-01-31 09:04:59,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:04:59,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:59,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:59,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:59,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:04:59,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:04:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:59,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 09:04:59,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:59,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:59,718 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:04:59,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:59,740 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:59,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:05:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:05:04,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:04,336 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 51 treesize of output 47 [2022-01-31 09:05:04,340 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 399 treesize of output 383 [2022-01-31 09:05:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:05:04,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731412914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:04,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:04,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 31 [2022-01-31 09:05:04,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380299177] [2022-01-31 09:05:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 09:05:04,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 09:05:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=817, Unknown=1, NotChecked=0, Total=930 [2022-01-31 09:05:04,647 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 29 states have internal predecessors, (84), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:05:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:09,215 INFO L93 Difference]: Finished difference Result 255 states and 323 transitions. [2022-01-31 09:05:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 09:05:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 29 states have internal predecessors, (84), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 47 [2022-01-31 09:05:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:09,216 INFO L225 Difference]: With dead ends: 255 [2022-01-31 09:05:09,217 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 09:05:09,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=595, Invalid=3433, Unknown=4, NotChecked=0, Total=4032 [2022-01-31 09:05:09,219 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 154 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:09,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 421 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1042 Invalid, 0 Unknown, 156 Unchecked, 0.7s Time] [2022-01-31 09:05:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 09:05:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 136. [2022-01-31 09:05:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 113 states have (on average 1.238938053097345) internal successors, (140), 116 states have internal predecessors, (140), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 09:05:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2022-01-31 09:05:09,224 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 47 [2022-01-31 09:05:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:09,225 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2022-01-31 09:05:09,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 29 states have internal predecessors, (84), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:05:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2022-01-31 09:05:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:05:09,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:09,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:09,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 09:05:09,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 09:05:09,439 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:09,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1001480951, now seen corresponding path program 3 times [2022-01-31 09:05:09,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:09,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811986095] [2022-01-31 09:05:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:09,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:09,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:09,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:09,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:09,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:09,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811986095] [2022-01-31 09:05:09,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811986095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:09,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291383022] [2022-01-31 09:05:09,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:05:09,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:09,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:09,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:05:09,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:05:09,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:05:09,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:09,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 09:05:09,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:09,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:05:09,925 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:09,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:05:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:16,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:18,531 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 25 treesize of output 23 [2022-01-31 09:05:18,533 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 88 treesize of output 84 [2022-01-31 09:05:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:18,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291383022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:18,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:18,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2022-01-31 09:05:18,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228770597] [2022-01-31 09:05:18,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:18,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 09:05:18,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 09:05:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=922, Unknown=2, NotChecked=0, Total=1056 [2022-01-31 09:05:18,677 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:05:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:22,145 INFO L93 Difference]: Finished difference Result 367 states and 462 transitions. [2022-01-31 09:05:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 09:05:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 56 [2022-01-31 09:05:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:22,147 INFO L225 Difference]: With dead ends: 367 [2022-01-31 09:05:22,147 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 09:05:22,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=533, Invalid=3882, Unknown=7, NotChecked=0, Total=4422 [2022-01-31 09:05:22,149 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 156 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:22,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 277 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 882 Invalid, 0 Unknown, 231 Unchecked, 0.6s Time] [2022-01-31 09:05:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 09:05:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 230. [2022-01-31 09:05:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 194 states have (on average 1.2268041237113403) internal successors, (238), 201 states have internal predecessors, (238), 23 states have call successors, (23), 14 states have call predecessors, (23), 12 states have return successors, (22), 14 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:05:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 283 transitions. [2022-01-31 09:05:22,157 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 283 transitions. Word has length 56 [2022-01-31 09:05:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:22,157 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 283 transitions. [2022-01-31 09:05:22,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:05:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 283 transitions. [2022-01-31 09:05:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:05:22,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:22,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:22,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:22,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:22,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash 631323048, now seen corresponding path program 1 times [2022-01-31 09:05:22,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:22,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383881147] [2022-01-31 09:05:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:22,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:05:22,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:22,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383881147] [2022-01-31 09:05:22,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383881147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:22,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:22,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:05:22,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218126743] [2022-01-31 09:05:22,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:22,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:05:22,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:05:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:05:22,436 INFO L87 Difference]: Start difference. First operand 230 states and 283 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:22,497 INFO L93 Difference]: Finished difference Result 259 states and 317 transitions. [2022-01-31 09:05:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:05:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-01-31 09:05:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:22,499 INFO L225 Difference]: With dead ends: 259 [2022-01-31 09:05:22,499 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 09:05:22,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:05:22,500 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:22,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:05:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 09:05:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2022-01-31 09:05:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 189 states have (on average 1.216931216931217) internal successors, (230), 195 states have internal predecessors, (230), 21 states have call successors, (21), 14 states have call predecessors, (21), 12 states have return successors, (20), 13 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 09:05:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 271 transitions. [2022-01-31 09:05:22,510 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 271 transitions. Word has length 56 [2022-01-31 09:05:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:22,510 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 271 transitions. [2022-01-31 09:05:22,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 271 transitions. [2022-01-31 09:05:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:05:22,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:22,511 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:22,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 09:05:22,511 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 961088809, now seen corresponding path program 1 times [2022-01-31 09:05:22,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580448350] [2022-01-31 09:05:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:22,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:05:22,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580448350] [2022-01-31 09:05:22,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580448350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:22,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:22,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:05:22,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532605570] [2022-01-31 09:05:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:22,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:05:22,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:05:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:05:22,563 INFO L87 Difference]: Start difference. First operand 223 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:22,628 INFO L93 Difference]: Finished difference Result 247 states and 299 transitions. [2022-01-31 09:05:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:05:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-01-31 09:05:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:22,630 INFO L225 Difference]: With dead ends: 247 [2022-01-31 09:05:22,630 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 09:05:22,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:05:22,631 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 51 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:22,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 59 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:05:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 09:05:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 216. [2022-01-31 09:05:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 182 states have (on average 1.1923076923076923) internal successors, (217), 188 states have internal predecessors, (217), 21 states have call successors, (21), 14 states have call predecessors, (21), 12 states have return successors, (20), 13 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 09:05:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2022-01-31 09:05:22,637 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 56 [2022-01-31 09:05:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:22,637 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2022-01-31 09:05:22,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2022-01-31 09:05:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:05:22,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:22,638 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:22,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 09:05:22,638 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1924164534, now seen corresponding path program 1 times [2022-01-31 09:05:22,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:22,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296100173] [2022-01-31 09:05:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:22,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:05:22,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:22,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296100173] [2022-01-31 09:05:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296100173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:22,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:22,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:05:22,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629847154] [2022-01-31 09:05:22,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:22,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:05:22,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:22,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:05:22,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:05:22,692 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:22,764 INFO L93 Difference]: Finished difference Result 289 states and 355 transitions. [2022-01-31 09:05:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:05:22,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-01-31 09:05:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:22,765 INFO L225 Difference]: With dead ends: 289 [2022-01-31 09:05:22,765 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 09:05:22,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:05:22,766 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 40 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:22,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 74 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:05:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 09:05:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 214. [2022-01-31 09:05:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 180 states have (on average 1.1833333333333333) internal successors, (213), 186 states have internal predecessors, (213), 21 states have call successors, (21), 14 states have call predecessors, (21), 12 states have return successors, (20), 13 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 09:05:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 254 transitions. [2022-01-31 09:05:22,772 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 254 transitions. Word has length 56 [2022-01-31 09:05:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:22,773 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 254 transitions. [2022-01-31 09:05:22,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 254 transitions. [2022-01-31 09:05:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:05:22,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:22,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:22,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 09:05:22,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1594398773, now seen corresponding path program 1 times [2022-01-31 09:05:22,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:22,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127834716] [2022-01-31 09:05:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:22,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:05:22,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:22,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127834716] [2022-01-31 09:05:22,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127834716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:22,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:22,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:05:22,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175031107] [2022-01-31 09:05:22,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:22,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:05:22,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:22,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:05:22,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:05:22,820 INFO L87 Difference]: Start difference. First operand 214 states and 254 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:22,874 INFO L93 Difference]: Finished difference Result 217 states and 257 transitions. [2022-01-31 09:05:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:05:22,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-01-31 09:05:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:22,876 INFO L225 Difference]: With dead ends: 217 [2022-01-31 09:05:22,876 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 09:05:22,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:05:22,876 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:22,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:05:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 09:05:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 196. [2022-01-31 09:05:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 163 states have (on average 1.165644171779141) internal successors, (190), 168 states have internal predecessors, (190), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (19), 13 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:05:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2022-01-31 09:05:22,882 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 56 [2022-01-31 09:05:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:22,882 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2022-01-31 09:05:22,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2022-01-31 09:05:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:05:22,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:22,883 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:22,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 09:05:22,883 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash -974571478, now seen corresponding path program 1 times [2022-01-31 09:05:22,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:22,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406974197] [2022-01-31 09:05:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:22,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:23,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:23,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:23,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:23,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:23,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:23,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406974197] [2022-01-31 09:05:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406974197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:23,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259144883] [2022-01-31 09:05:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:23,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:23,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:05:23,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:05:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 09:05:23,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:23,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:05:23,207 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:05:23,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:05:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:23,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:30,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:05:30,078 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 30 treesize of output 26 [2022-01-31 09:05:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:05:30,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259144883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:30,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:30,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 26 [2022-01-31 09:05:30,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926347321] [2022-01-31 09:05:30,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:30,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:05:30,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:05:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=550, Unknown=4, NotChecked=0, Total=650 [2022-01-31 09:05:30,110 INFO L87 Difference]: Start difference. First operand 196 states and 229 transitions. Second operand has 26 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:43,274 INFO L93 Difference]: Finished difference Result 419 states and 507 transitions. [2022-01-31 09:05:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 09:05:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 56 [2022-01-31 09:05:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:43,277 INFO L225 Difference]: With dead ends: 419 [2022-01-31 09:05:43,277 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 09:05:43,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 103 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=630, Invalid=3918, Unknown=8, NotChecked=0, Total=4556 [2022-01-31 09:05:43,279 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 132 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:43,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 388 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1814 Invalid, 0 Unknown, 123 Unchecked, 0.9s Time] [2022-01-31 09:05:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 09:05:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 248. [2022-01-31 09:05:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 202 states have (on average 1.1683168316831682) internal successors, (236), 212 states have internal predecessors, (236), 28 states have call successors, (28), 19 states have call predecessors, (28), 17 states have return successors, (27), 16 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 09:05:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 291 transitions. [2022-01-31 09:05:43,287 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 291 transitions. Word has length 56 [2022-01-31 09:05:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:43,287 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 291 transitions. [2022-01-31 09:05:43,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 291 transitions. [2022-01-31 09:05:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:05:43,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:43,289 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:43,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 09:05:43,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:43,499 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash 764908236, now seen corresponding path program 1 times [2022-01-31 09:05:43,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:43,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686559358] [2022-01-31 09:05:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:43,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:05:43,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:43,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686559358] [2022-01-31 09:05:43,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686559358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:43,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:43,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:05:43,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456026209] [2022-01-31 09:05:43,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:43,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:05:43,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:05:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:05:43,553 INFO L87 Difference]: Start difference. First operand 248 states and 291 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:43,628 INFO L93 Difference]: Finished difference Result 314 states and 381 transitions. [2022-01-31 09:05:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:05:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-01-31 09:05:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:43,631 INFO L225 Difference]: With dead ends: 314 [2022-01-31 09:05:43,631 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 09:05:43,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:05:43,632 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:43,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:05:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 09:05:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 240. [2022-01-31 09:05:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 194 states have (on average 1.1546391752577319) internal successors, (224), 204 states have internal predecessors, (224), 28 states have call successors, (28), 19 states have call predecessors, (28), 17 states have return successors, (27), 16 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 09:05:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 279 transitions. [2022-01-31 09:05:43,641 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 279 transitions. Word has length 56 [2022-01-31 09:05:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:43,642 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 279 transitions. [2022-01-31 09:05:43,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:05:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 279 transitions. [2022-01-31 09:05:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 09:05:43,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:43,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:43,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 09:05:43,643 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1731050897, now seen corresponding path program 1 times [2022-01-31 09:05:43,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873141730] [2022-01-31 09:05:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:43,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:05:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:05:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:05:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:05:43,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873141730] [2022-01-31 09:05:43,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873141730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:43,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:43,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:05:43,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763827096] [2022-01-31 09:05:43,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:43,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:05:43,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:05:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:05:43,685 INFO L87 Difference]: Start difference. First operand 240 states and 279 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:05:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:43,742 INFO L93 Difference]: Finished difference Result 225 states and 257 transitions. [2022-01-31 09:05:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:05:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-01-31 09:05:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:43,743 INFO L225 Difference]: With dead ends: 225 [2022-01-31 09:05:43,743 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 09:05:43,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:05:43,744 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:43,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:05:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 09:05:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 213. [2022-01-31 09:05:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 173 states have (on average 1.138728323699422) internal successors, (197), 180 states have internal predecessors, (197), 23 states have call successors, (23), 18 states have call predecessors, (23), 16 states have return successors, (22), 14 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:05:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 242 transitions. [2022-01-31 09:05:43,753 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 242 transitions. Word has length 63 [2022-01-31 09:05:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:43,753 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 242 transitions. [2022-01-31 09:05:43,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:05:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 242 transitions. [2022-01-31 09:05:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 09:05:43,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:43,754 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:43,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 09:05:43,755 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1148913676, now seen corresponding path program 4 times [2022-01-31 09:05:43,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:43,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151157407] [2022-01-31 09:05:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:43,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:05:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:05:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:05:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 09:05:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:43,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151157407] [2022-01-31 09:05:43,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151157407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:43,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783658763] [2022-01-31 09:05:43,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:05:43,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:43,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:43,942 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:05:43,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:05:44,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:05:44,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 09:05:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:44,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:06:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:06:16,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:17,271 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 35 treesize of output 31 [2022-01-31 09:06:17,285 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 67 treesize of output 59 [2022-01-31 09:06:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:06:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783658763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:17,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:17,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 31 [2022-01-31 09:06:17,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745524242] [2022-01-31 09:06:17,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:17,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 09:06:17,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 09:06:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=816, Unknown=5, NotChecked=0, Total=930 [2022-01-31 09:06:17,336 INFO L87 Difference]: Start difference. First operand 213 states and 242 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 29 states have internal predecessors, (100), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:06:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:31,996 INFO L93 Difference]: Finished difference Result 414 states and 484 transitions. [2022-01-31 09:06:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 09:06:31,997 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 29 states have internal predecessors, (100), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 65 [2022-01-31 09:06:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:31,998 INFO L225 Difference]: With dead ends: 414 [2022-01-31 09:06:31,998 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 09:06:32,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=665, Invalid=5640, Unknown=15, NotChecked=0, Total=6320 [2022-01-31 09:06:32,001 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 218 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:32,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 458 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1299 Invalid, 0 Unknown, 113 Unchecked, 0.8s Time] [2022-01-31 09:06:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 09:06:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 232. [2022-01-31 09:06:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 188 states have (on average 1.1329787234042554) internal successors, (213), 195 states have internal predecessors, (213), 26 states have call successors, (26), 19 states have call predecessors, (26), 17 states have return successors, (25), 17 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 09:06:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2022-01-31 09:06:32,008 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 65 [2022-01-31 09:06:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:32,008 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2022-01-31 09:06:32,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 29 states have internal predecessors, (100), 16 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:06:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2022-01-31 09:06:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 09:06:32,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:32,009 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:32,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:06:32,232 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,SelfDestructingSolverStorable20 [2022-01-31 09:06:32,232 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash -990687127, now seen corresponding path program 5 times [2022-01-31 09:06:32,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:32,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016881869] [2022-01-31 09:06:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:32,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:06:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:06:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:06:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 09:06:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 09:06:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:32,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016881869] [2022-01-31 09:06:32,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016881869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000329834] [2022-01-31 09:06:32,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:06:32,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:32,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:06:32,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:06:32,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 09:06:32,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:06:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:06:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:33,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:33,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000329834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:33,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:33,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2022-01-31 09:06:33,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736938485] [2022-01-31 09:06:33,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:33,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 09:06:33,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 09:06:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:06:33,549 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:06:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:33,904 INFO L93 Difference]: Finished difference Result 408 states and 462 transitions. [2022-01-31 09:06:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:06:33,906 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 74 [2022-01-31 09:06:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:33,907 INFO L225 Difference]: With dead ends: 408 [2022-01-31 09:06:33,907 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 09:06:33,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 09:06:33,908 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 254 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:33,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 99 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:06:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 09:06:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 246. [2022-01-31 09:06:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 202 states have (on average 1.1237623762376239) internal successors, (227), 209 states have internal predecessors, (227), 26 states have call successors, (26), 19 states have call predecessors, (26), 17 states have return successors, (25), 17 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 09:06:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 278 transitions. [2022-01-31 09:06:33,915 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 278 transitions. Word has length 74 [2022-01-31 09:06:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:33,915 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 278 transitions. [2022-01-31 09:06:33,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:06:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 278 transitions. [2022-01-31 09:06:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 09:06:33,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:33,916 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:33,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:06:34,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:34,140 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 669793200, now seen corresponding path program 6 times [2022-01-31 09:06:34,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:34,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98298943] [2022-01-31 09:06:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:34,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:06:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:06:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:06:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:06:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:06:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:34,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:34,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98298943] [2022-01-31 09:06:34,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98298943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:34,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865986145] [2022-01-31 09:06:34,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:06:34,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:34,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:06:34,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:06:34,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 09:06:34,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:06:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 09:06:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:34,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:06:34,809 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:06:34,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:06:34,821 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:06:34,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:06:34,837 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:06:34,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:06:34,850 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:06:34,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:06:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:35,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:36,318 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 51 treesize of output 47 [2022-01-31 09:06:36,321 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 399 treesize of output 383 [2022-01-31 09:06:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 74 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:36,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865986145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:36,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:36,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17] total 44 [2022-01-31 09:06:36,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457960193] [2022-01-31 09:06:36,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:36,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 09:06:36,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 09:06:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1727, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 09:06:36,723 INFO L87 Difference]: Start difference. First operand 246 states and 278 transitions. Second operand has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 42 states have internal predecessors, (141), 21 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:06:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:44,816 INFO L93 Difference]: Finished difference Result 763 states and 912 transitions. [2022-01-31 09:06:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 09:06:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 42 states have internal predecessors, (141), 21 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 81 [2022-01-31 09:06:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:44,818 INFO L225 Difference]: With dead ends: 763 [2022-01-31 09:06:44,818 INFO L226 Difference]: Without dead ends: 763 [2022-01-31 09:06:44,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 161 SyntacticMatches, 40 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12531 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2476, Invalid=28676, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 09:06:44,825 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 642 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 5120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:44,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 1052 Invalid, 5120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1363 Valid, 3321 Invalid, 0 Unknown, 436 Unchecked, 2.3s Time] [2022-01-31 09:06:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-31 09:06:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 324. [2022-01-31 09:06:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 262 states have (on average 1.1259541984732824) internal successors, (295), 275 states have internal predecessors, (295), 41 states have call successors, (41), 22 states have call predecessors, (41), 20 states have return successors, (40), 26 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 09:06:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 376 transitions. [2022-01-31 09:06:44,836 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 376 transitions. Word has length 81 [2022-01-31 09:06:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:44,836 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 376 transitions. [2022-01-31 09:06:44,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 42 states have internal predecessors, (141), 21 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:06:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 376 transitions. [2022-01-31 09:06:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 09:06:44,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:44,838 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:44,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:06:45,061 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,SelfDestructingSolverStorable22 [2022-01-31 09:06:45,061 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1362621765, now seen corresponding path program 7 times [2022-01-31 09:06:45,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:45,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006870963] [2022-01-31 09:06:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:45,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:06:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:06:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:06:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:06:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:06:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:06:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:06:45,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006870963] [2022-01-31 09:06:45,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006870963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628978237] [2022-01-31 09:06:45,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:06:45,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:45,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:45,336 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:06:45,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:06:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:45,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 09:06:45,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:45,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:06:45,624 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:06:45,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:06:45,640 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:06:45,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:06:45,661 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:06:45,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:07:56,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:07:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:07:56,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:59,682 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 17 treesize of output 15 [2022-01-31 09:07:59,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 09:07:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:07:59,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628978237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:59,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:59,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 43 [2022-01-31 09:07:59,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147917310] [2022-01-31 09:07:59,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:59,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 09:07:59,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 09:07:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1641, Unknown=7, NotChecked=0, Total=1806 [2022-01-31 09:07:59,862 INFO L87 Difference]: Start difference. First operand 324 states and 376 transitions. Second operand has 43 states, 43 states have (on average 3.4651162790697674) internal successors, (149), 42 states have internal predecessors, (149), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:08:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:08:09,361 INFO L93 Difference]: Finished difference Result 544 states and 636 transitions. [2022-01-31 09:08:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 09:08:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.4651162790697674) internal successors, (149), 42 states have internal predecessors, (149), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 90 [2022-01-31 09:08:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:08:09,363 INFO L225 Difference]: With dead ends: 544 [2022-01-31 09:08:09,363 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 09:08:09,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 161 SyntacticMatches, 34 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4653 ImplicationChecksByTransitivity, 82.3s TimeCoverageRelationStatistics Valid=1315, Invalid=12241, Unknown=16, NotChecked=0, Total=13572 [2022-01-31 09:08:09,365 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 234 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:08:09,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 511 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1999 Invalid, 0 Unknown, 467 Unchecked, 1.0s Time] [2022-01-31 09:08:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 09:08:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 383. [2022-01-31 09:08:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 309 states have (on average 1.1132686084142396) internal successors, (344), 324 states have internal predecessors, (344), 50 states have call successors, (50), 25 states have call predecessors, (50), 23 states have return successors, (49), 33 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 09:08:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2022-01-31 09:08:09,374 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 90 [2022-01-31 09:08:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:08:09,375 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2022-01-31 09:08:09,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.4651162790697674) internal successors, (149), 42 states have internal predecessors, (149), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:08:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2022-01-31 09:08:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 09:08:09,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:08:09,376 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:08:09,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:08:09,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 09:08:09,599 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:08:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:08:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash 878946438, now seen corresponding path program 1 times [2022-01-31 09:08:09,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:08:09,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830988855] [2022-01-31 09:08:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:09,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:08:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:08:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:08:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:08:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:08:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:08:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:08:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:08:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:08:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 09:08:09,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:08:09,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830988855] [2022-01-31 09:08:09,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830988855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:08:09,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:08:09,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:08:09,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104983377] [2022-01-31 09:08:09,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:08:09,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:08:09,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:08:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:08:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:08:09,652 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:08:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:08:09,713 INFO L93 Difference]: Finished difference Result 340 states and 394 transitions. [2022-01-31 09:08:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:08:09,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 90 [2022-01-31 09:08:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:08:09,715 INFO L225 Difference]: With dead ends: 340 [2022-01-31 09:08:09,715 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 09:08:09,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:08:09,716 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:08:09,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:08:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 09:08:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 323. [2022-01-31 09:08:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 261 states have (on average 1.1111111111111112) internal successors, (290), 273 states have internal predecessors, (290), 41 states have call successors, (41), 22 states have call predecessors, (41), 20 states have return successors, (40), 27 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 09:08:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 371 transitions. [2022-01-31 09:08:09,723 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 371 transitions. Word has length 90 [2022-01-31 09:08:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:08:09,723 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 371 transitions. [2022-01-31 09:08:09,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:08:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 371 transitions. [2022-01-31 09:08:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 09:08:09,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:08:09,725 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:08:09,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 09:08:09,725 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:08:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:08:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1295733659, now seen corresponding path program 1 times [2022-01-31 09:08:09,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:08:09,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509895592] [2022-01-31 09:08:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:09,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:08:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:08:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:08:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:08:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:08:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:08:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:08:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:09,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:08:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:10,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:08:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:08:10,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:08:10,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509895592] [2022-01-31 09:08:10,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509895592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:08:10,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623200339] [2022-01-31 09:08:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:10,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:08:10,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:08:10,018 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:08:10,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:08:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:08:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 09:08:10,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:08:10,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:08:10,288 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:08:10,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:08:10,302 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:08:10,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:08:10,318 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:08:10,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:09:19,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:09:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:09:19,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:22,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:09:22,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 09:09:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:09:22,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623200339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:22,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:22,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 43 [2022-01-31 09:09:22,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682473336] [2022-01-31 09:09:22,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:22,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 09:09:22,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 09:09:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1634, Unknown=7, NotChecked=0, Total=1806 [2022-01-31 09:09:22,531 INFO L87 Difference]: Start difference. First operand 323 states and 371 transitions. Second operand has 43 states, 43 states have (on average 3.4651162790697674) internal successors, (149), 42 states have internal predecessors, (149), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:09:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:39,953 INFO L93 Difference]: Finished difference Result 493 states and 567 transitions. [2022-01-31 09:09:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 09:09:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.4651162790697674) internal successors, (149), 42 states have internal predecessors, (149), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 90 [2022-01-31 09:09:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:39,955 INFO L225 Difference]: With dead ends: 493 [2022-01-31 09:09:39,956 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 09:09:39,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 161 SyntacticMatches, 20 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 88.3s TimeCoverageRelationStatistics Valid=1010, Invalid=7527, Unknown=19, NotChecked=0, Total=8556 [2022-01-31 09:09:39,957 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 193 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:39,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 534 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 1597 Invalid, 0 Unknown, 479 Unchecked, 0.9s Time] [2022-01-31 09:09:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 09:09:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 368. [2022-01-31 09:09:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 294 states have (on average 1.1088435374149659) internal successors, (326), 309 states have internal predecessors, (326), 50 states have call successors, (50), 25 states have call predecessors, (50), 23 states have return successors, (49), 33 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 09:09:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 425 transitions. [2022-01-31 09:09:39,972 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 425 transitions. Word has length 90 [2022-01-31 09:09:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:39,972 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 425 transitions. [2022-01-31 09:09:39,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.4651162790697674) internal successors, (149), 42 states have internal predecessors, (149), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:09:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 425 transitions. [2022-01-31 09:09:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 09:09:39,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:39,974 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:40,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 09:09:40,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 09:09:40,188 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2099195003, now seen corresponding path program 1 times [2022-01-31 09:09:40,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:40,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959669400] [2022-01-31 09:09:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:40,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:09:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:09:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:09:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:09:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:09:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:09:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:09:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:09:40,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959669400] [2022-01-31 09:09:40,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959669400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908801411] [2022-01-31 09:09:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:40,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:40,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:09:40,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:09:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:09:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:40,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:09:40,706 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:09:40,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:09:40,717 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:09:40,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:09:40,728 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:09:40,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:09:41,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:09:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:09:41,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:41,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:09:41,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 09:09:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:09:41,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908801411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:41,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:41,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 36 [2022-01-31 09:09:41,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674680188] [2022-01-31 09:09:41,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:41,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:09:41,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:09:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:09:41,417 INFO L87 Difference]: Start difference. First operand 368 states and 425 transitions. Second operand has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 35 states have internal predecessors, (132), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 09:09:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:46,889 INFO L93 Difference]: Finished difference Result 824 states and 982 transitions. [2022-01-31 09:09:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 09:09:46,889 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 35 states have internal predecessors, (132), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 90 [2022-01-31 09:09:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:46,891 INFO L225 Difference]: With dead ends: 824 [2022-01-31 09:09:46,892 INFO L226 Difference]: Without dead ends: 824 [2022-01-31 09:09:46,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7914 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2286, Invalid=21894, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 09:09:46,894 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 517 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 4042 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 5118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 4042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:46,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 550 Invalid, 5118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 4042 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 09:09:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-31 09:09:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 444. [2022-01-31 09:09:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 354 states have (on average 1.115819209039548) internal successors, (395), 376 states have internal predecessors, (395), 66 states have call successors, (66), 25 states have call predecessors, (66), 23 states have return successors, (65), 42 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 09:09:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 526 transitions. [2022-01-31 09:09:46,905 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 526 transitions. Word has length 90 [2022-01-31 09:09:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:46,905 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 526 transitions. [2022-01-31 09:09:46,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 35 states have internal predecessors, (132), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 09:09:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 526 transitions. [2022-01-31 09:09:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 09:09:46,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:46,907 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:46,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:09:47,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 09:09:47,131 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1226667333, now seen corresponding path program 2 times [2022-01-31 09:09:47,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:47,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804599860] [2022-01-31 09:09:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:47,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:09:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:09:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:09:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:09:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:09:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:09:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:09:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:09:47,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804599860] [2022-01-31 09:09:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804599860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608180013] [2022-01-31 09:09:47,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:09:47,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:47,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:47,337 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:09:47,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:09:47,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:09:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 09:09:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:47,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:09:47,507 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:09:47,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:09:47,523 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:09:47,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:09:47,538 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:09:47,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:10:53,502 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:10:53,502 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 42 treesize of output 20 [2022-01-31 09:10:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:10:53,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:55,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:10:55,685 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 30 treesize of output 26 [2022-01-31 09:10:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:10:55,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608180013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:10:55,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:10:55,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 26 [2022-01-31 09:10:55,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077273649] [2022-01-31 09:10:55,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:10:55,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:10:55,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:10:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:10:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=568, Unknown=7, NotChecked=0, Total=650 [2022-01-31 09:10:55,724 INFO L87 Difference]: Start difference. First operand 444 states and 526 transitions. Second operand has 26 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 09:11:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:11:48,469 INFO L93 Difference]: Finished difference Result 676 states and 793 transitions. [2022-01-31 09:11:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 09:11:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 90 [2022-01-31 09:11:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:11:48,471 INFO L225 Difference]: With dead ends: 676 [2022-01-31 09:11:48,472 INFO L226 Difference]: Without dead ends: 676 [2022-01-31 09:11:48,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 172 SyntacticMatches, 21 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 119.5s TimeCoverageRelationStatistics Valid=671, Invalid=5932, Unknown=39, NotChecked=0, Total=6642 [2022-01-31 09:11:48,473 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 116 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:11:48,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 512 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2456 Invalid, 0 Unknown, 211 Unchecked, 1.1s Time] [2022-01-31 09:11:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-31 09:11:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 522. [2022-01-31 09:11:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 412 states have (on average 1.1213592233009708) internal successors, (462), 440 states have internal predecessors, (462), 78 states have call successors, (78), 33 states have call predecessors, (78), 31 states have return successors, (77), 48 states have call predecessors, (77), 77 states have call successors, (77) [2022-01-31 09:11:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 617 transitions. [2022-01-31 09:11:48,483 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 617 transitions. Word has length 90 [2022-01-31 09:11:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:11:48,483 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 617 transitions. [2022-01-31 09:11:48,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 09:11:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 617 transitions. [2022-01-31 09:11:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 09:11:48,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:11:48,485 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:11:48,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 09:11:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:11:48,707 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:11:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:11:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash 961668748, now seen corresponding path program 3 times [2022-01-31 09:11:48,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:11:48,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409513425] [2022-01-31 09:11:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:11:48,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:11:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:11:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:11:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:11:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:11:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:11:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:11:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:11:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 09:11:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:11:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 117 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:11:48,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:11:48,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409513425] [2022-01-31 09:11:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409513425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:11:48,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504281287] [2022-01-31 09:11:48,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:11:48,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:11:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:11:48,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:11:48,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:11:49,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:11:49,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:11:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 09:11:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:11:49,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:11:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:49,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:11:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:11:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:11:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:11:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:11:49,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:11:49,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:11:49,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:11:49,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-31 09:11:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:11:49,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-31 09:11:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:11:49,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-31 09:11:49,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:11:49,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-31 09:11:49,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:11:49,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:11:49,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-31 09:11:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 09:11:49,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:12:07,303 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_191 Int)) (or (forall ((v_ArrVal_783 Int) (v_ArrVal_789 Int) (v_main_~i~0_190 Int) (v_ArrVal_799 Int)) (or (not (<= (+ v_main_~i~0_191 1) v_main_~i~0_190)) (let ((.cse1 (div c_~CELLCOUNT~0 5))) (let ((.cse0 (<= (+ v_main_~i~0_190 1) .cse1))) (and (or .cse0 (not (= (mod c_~CELLCOUNT~0 5) 0))) (or .cse0 (< c_~CELLCOUNT~0 0)) (<= v_main_~i~0_190 .cse1)))) (<= (select (let ((.cse3 (* 20 v_main_~i~0_190))) (store (store (let ((.cse2 (* 20 v_main_~i~0_191))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 20) |c_main_~#volArray~0.offset| .cse2) v_ArrVal_783) (+ |c_main_~#volArray~0.offset| .cse2 (- 8)) v_ArrVal_789)) (+ .cse3 (- 20) |c_main_~#volArray~0.offset|) 0) (+ .cse3 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_799)) |c_main_~#volArray~0.offset|) c_main_~CCCELVOL2~0))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_191)))) is different from false [2022-01-31 09:12:43,710 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 71 treesize of output 69 [2022-01-31 09:12:43,761 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 96501740 treesize of output 96468972 [2022-01-31 09:16:12,234 WARN L228 SmtUtils]: Spent 3.47m on a formula simplification that was a NOOP. DAG size: 2796 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)