/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/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:46:58,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:46:58,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:46:58,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 16:46:58,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 16:46:58,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 16:46:58,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 16:46:58,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 16:46:58,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 16:46:58,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 16:46:58,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 16:46:58,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 16:46:58,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:46:58,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:46:58,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:46:58,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:46:58,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:46:58,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:46:58,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:46:58,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:46:58,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:46:58,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:46:58,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:46:58,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:46:58,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:46:58,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:46:58,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:46:58,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:46:58,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:46:58,406 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:46:58,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:46:58,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:46:58,408 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:46:58,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:46:58,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:46:58,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:46:58,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:46:58,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:46:58,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:46:58,409 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:46:58,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:46:58,409 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:46:58,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:46:58,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:46:58,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:46:58,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:46:58,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:46:58,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:46:58,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:46:58,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:46:58,411 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:46:58,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:46:58,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:46:58,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:46:58,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:46:58,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:46:58,603 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:46:58,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-02-23 16:46:58,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d17f359/637d64cd3e094aceabbf7c9253a317ed/FLAGe08495008 [2022-02-23 16:46:59,010 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:46:59,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-02-23 16:46:59,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d17f359/637d64cd3e094aceabbf7c9253a317ed/FLAGe08495008 [2022-02-23 16:46:59,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d17f359/637d64cd3e094aceabbf7c9253a317ed [2022-02-23 16:46:59,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:46:59,034 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:46:59,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:46:59,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:46:59,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:46:59,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ef683b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59, skipping insertion in model container [2022-02-23 16:46:59,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:46:59,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:46:59,182 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-02-23 16:46:59,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:46:59,211 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:46:59,220 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-02-23 16:46:59,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:46:59,251 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:46:59,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59 WrapperNode [2022-02-23 16:46:59,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:46:59,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:46:59,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:46:59,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:46:59,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:46:59,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:46:59,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:46:59,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:46:59,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:46:59,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:46:59,318 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) [2022-02-23 16:46:59,328 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 [2022-02-23 16:46:59,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:46:59,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:46:59,345 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:46:59,346 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:46:59,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:46:59,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:46:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:46:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:46:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:46:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:46:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:46:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 16:46:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:46:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:46:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:46:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:46:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:46:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:46:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:46:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:46:59,391 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:46:59,392 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:46:59,549 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:46:59,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:46:59,553 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 16:46:59,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:46:59 BoogieIcfgContainer [2022-02-23 16:46:59,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:46:59,555 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:46:59,555 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:46:59,556 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:46:59,558 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:46:59" (1/1) ... [2022-02-23 16:46:59,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:46:59 BasicIcfg [2022-02-23 16:46:59,570 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:46:59,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:46:59,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:46:59,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:46:59,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:46:59" (1/4) ... [2022-02-23 16:46:59,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198de756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:46:59, skipping insertion in model container [2022-02-23 16:46:59,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:46:59" (2/4) ... [2022-02-23 16:46:59,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198de756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:46:59, skipping insertion in model container [2022-02-23 16:46:59,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:46:59" (3/4) ... [2022-02-23 16:46:59,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198de756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:46:59, skipping insertion in model container [2022-02-23 16:46:59,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:46:59" (4/4) ... [2022-02-23 16:46:59,576 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.cJordan [2022-02-23 16:46:59,580 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:46:59,580 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:46:59,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:46:59,618 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 [2022-02-23 16:46:59,619 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:46:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-02-23 16:46:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 16:46:59,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:46:59,636 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] [2022-02-23 16:46:59,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:46:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:46:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -414317756, now seen corresponding path program 1 times [2022-02-23 16:46:59,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:46:59,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953078939] [2022-02-23 16:46:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:46:59,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:46:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:46:59,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:46:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:46:59,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:46:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:46:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:46:59,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:46:59,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953078939] [2022-02-23 16:46:59,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953078939] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:46:59,779 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:46:59,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:46:59,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703192582] [2022-02-23 16:46:59,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:46:59,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:46:59,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:46:59,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:46:59,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:46:59,803 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-02-23 16:46:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:46:59,852 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-02-23 16:46:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:46:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21 [2022-02-23 16:46:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:46:59,863 INFO L225 Difference]: With dead ends: 27 [2022-02-23 16:46:59,863 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 16:46:59,864 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 [2022-02-23 16:46:59,869 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:46:59,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:46:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 16:46:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-23 16:46:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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) [2022-02-23 16:46:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-02-23 16:46:59,896 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-02-23 16:46:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:46:59,897 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-02-23 16:46:59,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-02-23 16:46:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-02-23 16:46:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 16:46:59,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:46:59,899 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] [2022-02-23 16:46:59,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:46:59,899 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:46:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:46:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1035089572, now seen corresponding path program 1 times [2022-02-23 16:46:59,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:46:59,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864624919] [2022-02-23 16:46:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:46:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:46:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:00,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:00,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864624919] [2022-02-23 16:47:00,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864624919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:47:00,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:47:00,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 16:47:00,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801993134] [2022-02-23 16:47:00,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:47:00,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 16:47:00,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 16:47:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 16:47:00,075 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:47:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:00,160 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-02-23 16:47:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 16:47:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-23 16:47:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:00,162 INFO L225 Difference]: With dead ends: 31 [2022-02-23 16:47:00,162 INFO L226 Difference]: Without dead ends: 31 [2022-02-23 16:47:00,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 16:47:00,163 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:00,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:47:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-23 16:47:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-02-23 16:47:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-02-23 16:47:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-02-23 16:47:00,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2022-02-23 16:47:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:00,169 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-02-23 16:47:00,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:47:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-02-23 16:47:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 16:47:00,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:00,170 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] [2022-02-23 16:47:00,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:47:00,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2124918270, now seen corresponding path program 1 times [2022-02-23 16:47:00,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:00,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401685697] [2022-02-23 16:47:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:47:00,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:00,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401685697] [2022-02-23 16:47:00,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401685697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:47:00,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:47:00,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:47:00,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520850986] [2022-02-23 16:47:00,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:47:00,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:47:00,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:47:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:47:00,248 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-02-23 16:47:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:00,321 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-02-23 16:47:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:47:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 24 [2022-02-23 16:47:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:00,323 INFO L225 Difference]: With dead ends: 33 [2022-02-23 16:47:00,324 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 16:47:00,324 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 [2022-02-23 16:47:00,325 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:00,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:47:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 16:47:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-02-23 16:47:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 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) [2022-02-23 16:47:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-02-23 16:47:00,330 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-02-23 16:47:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-02-23 16:47:00,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-02-23 16:47:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-02-23 16:47:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 16:47:00,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:00,331 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] [2022-02-23 16:47:00,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 16:47:00,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:00,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1237414589, now seen corresponding path program 1 times [2022-02-23 16:47:00,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:00,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837433471] [2022-02-23 16:47:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:00,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 16:47:00,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:00,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837433471] [2022-02-23 16:47:00,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837433471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:47:00,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:47:00,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 16:47:00,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106675292] [2022-02-23 16:47:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:47:00,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 16:47:00,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 16:47:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 16:47:00,412 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:47:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:00,490 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-02-23 16:47:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 16:47:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-02-23 16:47:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:00,493 INFO L225 Difference]: With dead ends: 40 [2022-02-23 16:47:00,493 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 16:47:00,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:47:00,495 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:00,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:47:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 16:47:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-23 16:47:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:47:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-02-23 16:47:00,500 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-02-23 16:47:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:00,500 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-02-23 16:47:00,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:47:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-02-23 16:47:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 16:47:00,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:00,501 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] [2022-02-23 16:47:00,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 16:47:00,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1236491068, now seen corresponding path program 1 times [2022-02-23 16:47:00,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:00,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75248823] [2022-02-23 16:47:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:00,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:00,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:00,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75248823] [2022-02-23 16:47:00,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75248823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:00,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091491504] [2022-02-23 16:47:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:00,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:00,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:00,580 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) [2022-02-23 16:47:00,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:47:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:00,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 16:47:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:00,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:00,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091491504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:00,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:00,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-23 16:47:00,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204808023] [2022-02-23 16:47:00,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:00,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 16:47:00,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 16:47:00,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-23 16:47:00,826 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:00,914 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-02-23 16:47:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:47:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2022-02-23 16:47:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:00,915 INFO L225 Difference]: With dead ends: 59 [2022-02-23 16:47:00,915 INFO L226 Difference]: Without dead ends: 59 [2022-02-23 16:47:00,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-23 16:47:00,918 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:00,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:47:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-23 16:47:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-02-23 16:47:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:47:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-02-23 16:47:00,934 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 24 [2022-02-23 16:47:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:00,934 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-02-23 16:47:00,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-02-23 16:47:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 16:47:00,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:00,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:00,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:47:01,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:01,153 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash 575066086, now seen corresponding path program 2 times [2022-02-23 16:47:01,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:01,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324274747] [2022-02-23 16:47:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:01,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:01,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:01,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:01,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:01,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324274747] [2022-02-23 16:47:01,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324274747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:01,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321312140] [2022-02-23 16:47:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:47:01,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:01,267 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) [2022-02-23 16:47:01,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:47:01,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:47:01,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:47:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 16:47:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 16:47:01,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 16:47:01,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321312140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:01,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:01,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-02-23 16:47:01,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857568932] [2022-02-23 16:47:01,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:01,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 16:47:01,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 16:47:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-23 16:47:01,435 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 16:47:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:01,678 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2022-02-23 16:47:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 16:47:01,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-02-23 16:47:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:01,680 INFO L225 Difference]: With dead ends: 110 [2022-02-23 16:47:01,680 INFO L226 Difference]: Without dead ends: 110 [2022-02-23 16:47:01,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2022-02-23 16:47:01,681 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:01,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 42 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:47:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-23 16:47:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2022-02-23 16:47:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 88 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 16:47:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-02-23 16:47:01,687 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 33 [2022-02-23 16:47:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:01,687 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-02-23 16:47:01,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 16:47:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-02-23 16:47:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 16:47:01,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:01,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:01,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:47:01,906 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 [2022-02-23 16:47:01,907 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1861776890, now seen corresponding path program 1 times [2022-02-23 16:47:01,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:01,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508232560] [2022-02-23 16:47:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:01,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:01,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:01,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-02-23 16:47:01,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:01,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508232560] [2022-02-23 16:47:01,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508232560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:47:01,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:47:01,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:47:01,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906323269] [2022-02-23 16:47:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:47:01,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:47:01,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:47:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:47:01,964 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-02-23 16:47:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:02,012 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2022-02-23 16:47:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:47:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 39 [2022-02-23 16:47:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:02,018 INFO L225 Difference]: With dead ends: 144 [2022-02-23 16:47:02,018 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 16:47:02,019 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 [2022-02-23 16:47:02,019 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:02,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 51 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:47:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 16:47:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2022-02-23 16:47:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 123 states have internal predecessors, (163), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 16:47:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2022-02-23 16:47:02,030 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 39 [2022-02-23 16:47:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:02,030 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2022-02-23 16:47:02,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-02-23 16:47:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2022-02-23 16:47:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 16:47:02,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:02,031 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:02,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 16:47:02,031 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1666296505, now seen corresponding path program 1 times [2022-02-23 16:47:02,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:02,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938252700] [2022-02-23 16:47:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:02,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:02,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:02,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 16:47:02,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:02,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938252700] [2022-02-23 16:47:02,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938252700] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:47:02,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:47:02,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:47:02,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877026450] [2022-02-23 16:47:02,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:47:02,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:47:02,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:47:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:47:02,092 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 16:47:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:02,122 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-02-23 16:47:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:47:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 40 [2022-02-23 16:47:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:02,123 INFO L225 Difference]: With dead ends: 144 [2022-02-23 16:47:02,123 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 16:47:02,123 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 [2022-02-23 16:47:02,126 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:02,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:47:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 16:47:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2022-02-23 16:47:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 127 states have internal predecessors, (167), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 16:47:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2022-02-23 16:47:02,146 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 40 [2022-02-23 16:47:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2022-02-23 16:47:02,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 16:47:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2022-02-23 16:47:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 16:47:02,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:02,147 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:02,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-23 16:47:02,148 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1695849177, now seen corresponding path program 1 times [2022-02-23 16:47:02,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:02,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430719723] [2022-02-23 16:47:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:02,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:02,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:02,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:02,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:02,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430719723] [2022-02-23 16:47:02,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430719723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:02,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790538893] [2022-02-23 16:47:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:02,256 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) [2022-02-23 16:47:02,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:47:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:02,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 16:47:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:02,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:02,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790538893] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:02,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:02,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-23 16:47:02,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812787589] [2022-02-23 16:47:02,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:02,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 16:47:02,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 16:47:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-02-23 16:47:02,598 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:02,795 INFO L93 Difference]: Finished difference Result 258 states and 339 transitions. [2022-02-23 16:47:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 16:47:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-02-23 16:47:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:02,796 INFO L225 Difference]: With dead ends: 258 [2022-02-23 16:47:02,796 INFO L226 Difference]: Without dead ends: 258 [2022-02-23 16:47:02,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=723, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 16:47:02,797 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:02,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 28 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:47:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-23 16:47:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-02-23 16:47:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 246 states have (on average 1.329268292682927) internal successors, (327), 247 states have internal predecessors, (327), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 16:47:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 338 transitions. [2022-02-23 16:47:02,803 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 338 transitions. Word has length 40 [2022-02-23 16:47:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:02,803 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 338 transitions. [2022-02-23 16:47:02,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 338 transitions. [2022-02-23 16:47:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 16:47:02,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:02,804 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:02,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 16:47:03,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:03,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:03,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash 150253017, now seen corresponding path program 2 times [2022-02-23 16:47:03,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:03,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277442412] [2022-02-23 16:47:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:03,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:03,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:03,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:03,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277442412] [2022-02-23 16:47:03,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277442412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:03,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576130254] [2022-02-23 16:47:03,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:47:03,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:03,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:03,214 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) [2022-02-23 16:47:03,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:47:03,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:47:03,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:47:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 16:47:03,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-23 16:47:03,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-23 16:47:03,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576130254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:03,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:03,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 26 [2022-02-23 16:47:03,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595227231] [2022-02-23 16:47:03,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:03,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 16:47:03,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 16:47:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2022-02-23 16:47:03,639 INFO L87 Difference]: Start difference. First operand 257 states and 338 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:04,609 INFO L93 Difference]: Finished difference Result 1062 states and 1392 transitions. [2022-02-23 16:47:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-23 16:47:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2022-02-23 16:47:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:04,612 INFO L225 Difference]: With dead ends: 1062 [2022-02-23 16:47:04,612 INFO L226 Difference]: Without dead ends: 1062 [2022-02-23 16:47:04,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1752, Invalid=4568, Unknown=0, NotChecked=0, Total=6320 [2022-02-23 16:47:04,614 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 429 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:04,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 40 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:47:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-02-23 16:47:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 524. [2022-02-23 16:47:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 507 states have (on average 1.331360946745562) internal successors, (675), 508 states have internal predecessors, (675), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 16:47:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 694 transitions. [2022-02-23 16:47:04,623 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 694 transitions. Word has length 64 [2022-02-23 16:47:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:04,624 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 694 transitions. [2022-02-23 16:47:04,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 694 transitions. [2022-02-23 16:47:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-23 16:47:04,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:04,625 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:04,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-23 16:47:04,841 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 [2022-02-23 16:47:04,842 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash -110856328, now seen corresponding path program 1 times [2022-02-23 16:47:04,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:04,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213788995] [2022-02-23 16:47:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:05,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:05,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:05,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213788995] [2022-02-23 16:47:05,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213788995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:05,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584099017] [2022-02-23 16:47:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:05,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:05,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:05,048 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) [2022-02-23 16:47:05,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 16:47:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:05,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 16:47:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:05,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:05,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584099017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:05,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:05,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-02-23 16:47:05,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255660039] [2022-02-23 16:47:05,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:05,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-23 16:47:05,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-23 16:47:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=1779, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 16:47:05,909 INFO L87 Difference]: Start difference. First operand 524 states and 694 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:06,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:06,362 INFO L93 Difference]: Finished difference Result 3382 states and 4457 transitions. [2022-02-23 16:47:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-23 16:47:06,363 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-02-23 16:47:06,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:06,372 INFO L225 Difference]: With dead ends: 3382 [2022-02-23 16:47:06,372 INFO L226 Difference]: Without dead ends: 3382 [2022-02-23 16:47:06,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1969, Invalid=3433, Unknown=0, NotChecked=0, Total=5402 [2022-02-23 16:47:06,374 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 32 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:47:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2022-02-23 16:47:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1107. [2022-02-23 16:47:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1090 states have (on average 1.3293577981651377) internal successors, (1449), 1091 states have internal predecessors, (1449), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 16:47:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1468 transitions. [2022-02-23 16:47:06,398 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1468 transitions. Word has length 70 [2022-02-23 16:47:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:06,399 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1468 transitions. [2022-02-23 16:47:06,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1468 transitions. [2022-02-23 16:47:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-23 16:47:06,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:06,401 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:06,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-23 16:47:06,615 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,SelfDestructingSolverStorable10 [2022-02-23 16:47:06,615 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1335274040, now seen corresponding path program 2 times [2022-02-23 16:47:06,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:06,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191701] [2022-02-23 16:47:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:06,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:07,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:07,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:07,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191701] [2022-02-23 16:47:07,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191701] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:07,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724700591] [2022-02-23 16:47:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:47:07,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:07,132 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) [2022-02-23 16:47:07,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 16:47:07,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:47:07,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:47:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 16:47:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:08,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:09,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724700591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:09,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:09,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 110 [2022-02-23 16:47:09,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11618500] [2022-02-23 16:47:09,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:09,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-23 16:47:09,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-23 16:47:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5189, Invalid=6801, Unknown=0, NotChecked=0, Total=11990 [2022-02-23 16:47:09,216 INFO L87 Difference]: Start difference. First operand 1107 states and 1468 transitions. Second operand has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:11,051 INFO L93 Difference]: Finished difference Result 6154 states and 8129 transitions. [2022-02-23 16:47:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-23 16:47:11,051 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 124 [2022-02-23 16:47:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:11,066 INFO L225 Difference]: With dead ends: 6154 [2022-02-23 16:47:11,066 INFO L226 Difference]: Without dead ends: 6154 [2022-02-23 16:47:11,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7556 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7819, Invalid=13351, Unknown=0, NotChecked=0, Total=21170 [2022-02-23 16:47:11,070 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 561 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:11,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 42 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 16:47:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2022-02-23 16:47:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 2295. [2022-02-23 16:47:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2278 states have (on average 1.3314310798946445) internal successors, (3033), 2279 states have internal predecessors, (3033), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 16:47:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3052 transitions. [2022-02-23 16:47:11,115 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3052 transitions. Word has length 124 [2022-02-23 16:47:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:11,115 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3052 transitions. [2022-02-23 16:47:11,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3052 transitions. [2022-02-23 16:47:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-02-23 16:47:11,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:11,118 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:11,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 16:47:11,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:11,349 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash 872046520, now seen corresponding path program 3 times [2022-02-23 16:47:11,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:11,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607942237] [2022-02-23 16:47:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:13,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:13,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:13,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607942237] [2022-02-23 16:47:13,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607942237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:13,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469477231] [2022-02-23 16:47:13,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:47:13,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:13,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:13,318 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) [2022-02-23 16:47:13,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 16:47:13,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 16:47:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:47:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 16:47:13,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-02-23 16:47:13,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 16:47:13,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469477231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:47:13,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 16:47:13,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [75] total 79 [2022-02-23 16:47:13,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247461992] [2022-02-23 16:47:13,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:47:13,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 16:47:13,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 16:47:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2642, Invalid=3520, Unknown=0, NotChecked=0, Total=6162 [2022-02-23 16:47:13,666 INFO L87 Difference]: Start difference. First operand 2295 states and 3052 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 16:47:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:13,728 INFO L93 Difference]: Finished difference Result 1858 states and 2467 transitions. [2022-02-23 16:47:13,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 16:47:13,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 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 232 [2022-02-23 16:47:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:13,734 INFO L225 Difference]: With dead ends: 1858 [2022-02-23 16:47:13,734 INFO L226 Difference]: Without dead ends: 1858 [2022-02-23 16:47:13,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2646, Invalid=3674, Unknown=0, NotChecked=0, Total=6320 [2022-02-23 16:47:13,737 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:13,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:47:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-02-23 16:47:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1857. [2022-02-23 16:47:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1843 states have (on average 1.3298969072164948) internal successors, (2451), 1844 states have internal predecessors, (2451), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 16:47:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2466 transitions. [2022-02-23 16:47:13,773 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2466 transitions. Word has length 232 [2022-02-23 16:47:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:13,774 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2466 transitions. [2022-02-23 16:47:13,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 16:47:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2466 transitions. [2022-02-23 16:47:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-02-23 16:47:13,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:13,776 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:13,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 16:47:13,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:13,993 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1465535191, now seen corresponding path program 1 times [2022-02-23 16:47:13,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:13,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294398799] [2022-02-23 16:47:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:15,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:15,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:15,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:15,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294398799] [2022-02-23 16:47:15,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294398799] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:15,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836333621] [2022-02-23 16:47:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:15,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:15,388 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) [2022-02-23 16:47:15,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 16:47:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 73 conjunts are in the unsatisfiable core [2022-02-23 16:47:15,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:17,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:21,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836333621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:21,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:21,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 218 [2022-02-23 16:47:21,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997256882] [2022-02-23 16:47:21,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:21,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-02-23 16:47:21,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:21,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-02-23 16:47:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20741, Invalid=26565, Unknown=0, NotChecked=0, Total=47306 [2022-02-23 16:47:21,948 INFO L87 Difference]: Start difference. First operand 1857 states and 2466 transitions. Second operand has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:27,903 INFO L93 Difference]: Finished difference Result 3802 states and 5059 transitions. [2022-02-23 16:47:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-23 16:47:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 232 [2022-02-23 16:47:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:27,913 INFO L225 Difference]: With dead ends: 3802 [2022-02-23 16:47:27,913 INFO L226 Difference]: Without dead ends: 3802 [2022-02-23 16:47:27,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30668 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=31183, Invalid=52627, Unknown=0, NotChecked=0, Total=83810 [2022-02-23 16:47:27,917 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1738 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:27,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 31 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 16:47:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-02-23 16:47:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3801. [2022-02-23 16:47:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3787 states have (on average 1.3316609453393187) internal successors, (5043), 3788 states have internal predecessors, (5043), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 16:47:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5058 transitions. [2022-02-23 16:47:27,953 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5058 transitions. Word has length 232 [2022-02-23 16:47:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:27,954 INFO L470 AbstractCegarLoop]: Abstraction has 3801 states and 5058 transitions. [2022-02-23 16:47:27,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:47:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5058 transitions. [2022-02-23 16:47:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-02-23 16:47:27,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:27,958 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:27,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 16:47:28,159 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,SelfDestructingSolverStorable13 [2022-02-23 16:47:28,160 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -638197545, now seen corresponding path program 2 times [2022-02-23 16:47:28,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:28,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318783480] [2022-02-23 16:47:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:28,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:47:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:32,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:47:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:32,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:47:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:47:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:32,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:47:32,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318783480] [2022-02-23 16:47:32,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318783480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:47:32,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807260709] [2022-02-23 16:47:32,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:47:32,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:47:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:47:32,920 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) [2022-02-23 16:47:32,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 16:47:33,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:47:33,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:47:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 145 conjunts are in the unsatisfiable core [2022-02-23 16:47:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:47:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:39,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:47:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:47:54,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807260709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:47:54,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:47:54,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 434 [2022-02-23 16:47:54,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694388074] [2022-02-23 16:47:54,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:47:54,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 434 states [2022-02-23 16:47:54,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:47:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 434 interpolants. [2022-02-23 16:47:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82949, Invalid=104973, Unknown=0, NotChecked=0, Total=187922 [2022-02-23 16:47:54,563 INFO L87 Difference]: Start difference. First operand 3801 states and 5058 transitions. Second operand has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:48:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:48:31,977 INFO L93 Difference]: Finished difference Result 7690 states and 10243 transitions. [2022-02-23 16:48:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-02-23 16:48:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 448 [2022-02-23 16:48:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:48:32,030 INFO L225 Difference]: With dead ends: 7690 [2022-02-23 16:48:32,030 INFO L226 Difference]: Without dead ends: 7690 [2022-02-23 16:48:32,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123548 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=124567, Invalid=208939, Unknown=0, NotChecked=0, Total=333506 [2022-02-23 16:48:32,049 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4012 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4013 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:48:32,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4013 Valid, 31 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 16:48:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-02-23 16:48:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7689. [2022-02-23 16:48:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7675 states have (on average 1.3325081433224755) internal successors, (10227), 7676 states have internal predecessors, (10227), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 16:48:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 10242 transitions. [2022-02-23 16:48:32,141 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 10242 transitions. Word has length 448 [2022-02-23 16:48:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:48:32,142 INFO L470 AbstractCegarLoop]: Abstraction has 7689 states and 10242 transitions. [2022-02-23 16:48:32,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 16:48:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 10242 transitions. [2022-02-23 16:48:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-02-23 16:48:32,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:48:32,160 INFO L514 BasicCegarLoop]: trace histogram [286, 286, 285, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:48:32,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 16:48:32,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 16:48:32,377 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:48:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:48:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash 878120151, now seen corresponding path program 3 times [2022-02-23 16:48:32,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:48:32,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967936005] [2022-02-23 16:48:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:48:32,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:48:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:48:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:48:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:48:52,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:48:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:48:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:48:52,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:48:52,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967936005] [2022-02-23 16:48:52,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967936005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:48:52,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922461835] [2022-02-23 16:48:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:48:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:48:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:48:52,030 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) [2022-02-23 16:48:52,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 16:48:52,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 16:48:52,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:48:52,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 16:48:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:48:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 856 proven. 0 refuted. 0 times theorem prover too weak. 121695 trivial. 0 not checked. [2022-02-23 16:48:55,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 16:48:55,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922461835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:48:55,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 16:48:55,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [291] total 298 [2022-02-23 16:48:55,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839283381] [2022-02-23 16:48:55,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:48:55,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 16:48:55,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:48:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 16:48:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41640, Invalid=46866, Unknown=0, NotChecked=0, Total=88506 [2022-02-23 16:48:55,576 INFO L87 Difference]: Start difference. First operand 7689 states and 10242 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 16:48:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:48:55,730 INFO L93 Difference]: Finished difference Result 10245 states and 13643 transitions. [2022-02-23 16:48:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:48:55,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 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 880 [2022-02-23 16:48:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:48:55,758 INFO L225 Difference]: With dead ends: 10245 [2022-02-23 16:48:55,758 INFO L226 Difference]: Without dead ends: 10245 [2022-02-23 16:48:55,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=41644, Invalid=47458, Unknown=0, NotChecked=0, Total=89102 [2022-02-23 16:48:55,762 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:48:55,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 95 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:48:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2022-02-23 16:48:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 10241. [2022-02-23 16:48:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10220 states have (on average 1.3322896281800392) internal successors, (13616), 10224 states have internal predecessors, (13616), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 16:48:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 13639 transitions. [2022-02-23 16:48:55,874 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 13639 transitions. Word has length 880 [2022-02-23 16:48:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:48:55,875 INFO L470 AbstractCegarLoop]: Abstraction has 10241 states and 13639 transitions. [2022-02-23 16:48:55,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 16:48:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 13639 transitions. [2022-02-23 16:48:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-02-23 16:48:55,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:48:55,883 INFO L514 BasicCegarLoop]: trace histogram [286, 286, 270, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:48:55,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 16:48:56,099 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,SelfDestructingSolverStorable15 [2022-02-23 16:48:56,099 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:48:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:48:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash -207718695, now seen corresponding path program 1 times [2022-02-23 16:48:56,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:48:56,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121230706] [2022-02-23 16:48:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:48:56,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:48:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:49:15,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:49:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:49:15,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 16:49:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:49:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:49:15,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:49:15,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121230706] [2022-02-23 16:49:15,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121230706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:49:15,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121327957] [2022-02-23 16:49:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:49:15,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:49:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:49:15,059 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) [2022-02-23 16:49:15,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 16:49:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:49:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 289 conjunts are in the unsatisfiable core [2022-02-23 16:49:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:49:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:49:36,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:50:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:50:26,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121327957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:50:26,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:50:26,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 290, 290] total 866 [2022-02-23 16:50:26,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980659046] [2022-02-23 16:50:26,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:50:26,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 866 states [2022-02-23 16:50:26,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:50:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 866 interpolants. [2022-02-23 16:50:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331781, Invalid=417309, Unknown=0, NotChecked=0, Total=749090 [2022-02-23 16:50:26,878 INFO L87 Difference]: Start difference. First operand 10241 states and 13639 transitions. Second operand has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 17:00:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:00:40,472 INFO L93 Difference]: Finished difference Result 20609 states and 27463 transitions. [2022-02-23 17:00:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 579 states. [2022-02-23 17:00:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 880 [2022-02-23 17:00:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:00:40,502 INFO L225 Difference]: With dead ends: 20609 [2022-02-23 17:00:40,502 INFO L226 Difference]: Without dead ends: 20609 [2022-02-23 17:00:40,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2341 GetRequests, 1189 SyntacticMatches, 0 SemanticMatches, 1152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495932 ImplicationChecksByTransitivity, 148.0s TimeCoverageRelationStatistics Valid=497959, Invalid=832603, Unknown=0, NotChecked=0, Total=1330562 [2022-02-23 17:00:40,590 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7064 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7065 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-23 17:00:40,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7065 Valid, 44 Invalid, 4055 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [892 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-23 17:00:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2022-02-23 17:00:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 20609. [2022-02-23 17:00:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20609 states, 20588 states have (on average 1.332815232174082) internal successors, (27440), 20592 states have internal predecessors, (27440), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 17:00:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 27463 transitions. [2022-02-23 17:00:40,801 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 27463 transitions. Word has length 880 [2022-02-23 17:00:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:00:40,802 INFO L470 AbstractCegarLoop]: Abstraction has 20609 states and 27463 transitions. [2022-02-23 17:00:40,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 17:00:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 27463 transitions. [2022-02-23 17:00:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1745 [2022-02-23 17:00:40,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:00:40,823 INFO L514 BasicCegarLoop]: trace histogram [574, 574, 558, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:00:40,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-23 17:00:41,042 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,SelfDestructingSolverStorable16 [2022-02-23 17:00:41,042 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:00:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:00:41,043 INFO L85 PathProgramCache]: Analyzing trace with hash -441769255, now seen corresponding path program 2 times [2022-02-23 17:00:41,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:00:41,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621937322] [2022-02-23 17:00:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:00:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:00:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat