/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/nla-digbench-scaling/dijkstra-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:12:30,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:12:30,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:12:30,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:12:30,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:12:30,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:12:30,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:12:30,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:12:30,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:12:30,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:12:30,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:12:30,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:12:30,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:12:30,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:12:30,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:12:30,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:12:30,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:12:30,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:12:30,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:12:30,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:12:30,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:12:30,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:12:30,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:12:30,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:12:30,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:12:30,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 22:12:30,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 22:12:30,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 22:12:30,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 22:12:30,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 22:12:30,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 22:12:30,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 22:12:30,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 22:12:30,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:12:30,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:12:30,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:12:30,398 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:12:30,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:12:30,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:12:30,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:12:30,408 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:12:30,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:12:30,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:12:30,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:12:30,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:12:30,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:12:30,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:12:30,409 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:12:30,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:12:30,409 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:12:30,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:12:30,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:12:30,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:12:30,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:12:30,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:12:30,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:12:30,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:12:30,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:12:30,411 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:12:30,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:12:30,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:12:30,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:12:30,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:12:30,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:12:30,645 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:12:30,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2022-02-14 22:12:30,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03ea6525e/653c9b3d0faf4668b6e3227d3932b915/FLAGd2d16f999 [2022-02-14 22:12:31,070 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:12:31,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2022-02-14 22:12:31,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03ea6525e/653c9b3d0faf4668b6e3227d3932b915/FLAGd2d16f999 [2022-02-14 22:12:31,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03ea6525e/653c9b3d0faf4668b6e3227d3932b915 [2022-02-14 22:12:31,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:12:31,514 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:12:31,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:12:31,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:12:31,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:12:31,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfe56c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31, skipping insertion in model container [2022-02-14 22:12:31,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:12:31,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:12:31,669 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2022-02-14 22:12:31,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:12:31,718 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:12:31,726 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2022-02-14 22:12:31,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:12:31,743 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:12:31,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31 WrapperNode [2022-02-14 22:12:31,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:12:31,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:12:31,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:12:31,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:12:31,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:12:31,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:12:31,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:12:31,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:12:31,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (1/1) ... [2022-02-14 22:12:31,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:12:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:12:31,791 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) [2022-02-14 22:12:31,799 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 [2022-02-14 22:12:31,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:12:31,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:12:31,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:12:31,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:12:31,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:12:31,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:12:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:12:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:12:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:12:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:12:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 22:12:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:12:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:12:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:12:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:12:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:12:31,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:12:31,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:12:31,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:12:31,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:12:31,881 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:12:31,883 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:12:32,035 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:12:32,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:12:32,040 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 22:12:32,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:12:32 BoogieIcfgContainer [2022-02-14 22:12:32,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:12:32,041 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:12:32,041 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:12:32,042 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:12:32,044 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:12:32" (1/1) ... [2022-02-14 22:12:32,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:12:32 BasicIcfg [2022-02-14 22:12:32,062 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:12:32,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:12:32,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:12:32,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:12:32,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:12:31" (1/4) ... [2022-02-14 22:12:32,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b70348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:12:32, skipping insertion in model container [2022-02-14 22:12:32,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:12:31" (2/4) ... [2022-02-14 22:12:32,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b70348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:12:32, skipping insertion in model container [2022-02-14 22:12:32,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:12:32" (3/4) ... [2022-02-14 22:12:32,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b70348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:12:32, skipping insertion in model container [2022-02-14 22:12:32,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:12:32" (4/4) ... [2022-02-14 22:12:32,069 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.cJordan [2022-02-14 22:12:32,073 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:12:32,073 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:12:32,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:12:32,122 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 [2022-02-14 22:12:32,122 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:12:32,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 22:12:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:12:32,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:12:32,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:12:32,145 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:12:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:12:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-02-14 22:12:32,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:12:32,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569523615] [2022-02-14 22:12:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:12:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:32,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:12:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:12:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:32,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 22:12:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:12:32,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:12:32,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569523615] [2022-02-14 22:12:32,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569523615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:12:32,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:12:32,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:12:32,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671749533] [2022-02-14 22:12:32,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:12:32,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:12:32,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:12:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:12:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:12:32,382 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:12:34,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:12:36,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:12:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:12:36,567 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-02-14 22:12:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:12:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 22:12:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:12:36,573 INFO L225 Difference]: With dead ends: 38 [2022-02-14 22:12:36,574 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 22:12:36,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:12:36,576 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:12:36,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-02-14 22:12:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 22:12:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 22:12:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:12:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-14 22:12:36,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-14 22:12:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:12:36,603 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-14 22:12:36,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:12:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-14 22:12:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 22:12:36,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:12:36,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:12:36,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:12:36,604 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:12:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:12:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-02-14 22:12:36,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:12:36,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606908645] [2022-02-14 22:12:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:12:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:36,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:12:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:12:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:36,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 22:12:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:12:36,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:12:36,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606908645] [2022-02-14 22:12:36,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606908645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:12:36,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:12:36,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 22:12:36,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055054869] [2022-02-14 22:12:36,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:12:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:12:36,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:12:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:12:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:12:36,858 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:12:40,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:12:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:12:42,026 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-02-14 22:12:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:12:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-14 22:12:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:12:42,028 INFO L225 Difference]: With dead ends: 50 [2022-02-14 22:12:42,028 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 22:12:42,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:12:42,030 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:12:42,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 51 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-02-14 22:12:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 22:12:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-14 22:12:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 22:12:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-14 22:12:42,037 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-14 22:12:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:12:42,038 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-14 22:12:42,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:12:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-14 22:12:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-14 22:12:42,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:12:42,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:12:42,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 22:12:42,039 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:12:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:12:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-02-14 22:12:42,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:12:42,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377345629] [2022-02-14 22:12:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:42,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:12:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:12:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:12:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:42,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 22:12:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-14 22:12:42,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:12:42,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377345629] [2022-02-14 22:12:42,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377345629] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:12:42,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:12:42,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 22:12:42,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485874941] [2022-02-14 22:12:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:12:42,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:12:42,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:12:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:12:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:12:42,146 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:12:45,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:12:47,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:12:49,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:12:51,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:12:53,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:12:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:12:53,788 INFO L93 Difference]: Finished difference Result 75 states and 110 transitions. [2022-02-14 22:12:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:12:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-02-14 22:12:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:12:53,790 INFO L225 Difference]: With dead ends: 75 [2022-02-14 22:12:53,790 INFO L226 Difference]: Without dead ends: 71 [2022-02-14 22:12:53,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:12:53,791 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 88 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:12:53,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 211 Invalid, 5 Unknown, 0 Unchecked, 11.5s Time] [2022-02-14 22:12:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-14 22:12:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2022-02-14 22:12:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 22:12:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-02-14 22:12:53,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 26 [2022-02-14 22:12:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:12:53,805 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-02-14 22:12:53,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:12:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-02-14 22:12:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 22:12:53,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:12:53,806 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:12:53,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 22:12:53,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:12:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:12:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-02-14 22:12:53,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:12:53,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313433763] [2022-02-14 22:12:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:12:53,817 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:12:53,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155843526] [2022-02-14 22:12:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:12:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:12:53,819 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) [2022-02-14 22:12:53,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:12:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:12:53,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:12:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:12:54,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:12:54,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:12:54,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313433763] [2022-02-14 22:12:54,098 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:12:54,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155843526] [2022-02-14 22:12:54,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155843526] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:12:54,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:12:54,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:12:54,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997213256] [2022-02-14 22:12:54,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:12:54,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:12:54,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:12:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:12:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:12:54,103 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:12:54,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:12:54,617 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2022-02-14 22:12:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:12:54,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-02-14 22:12:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:12:54,619 INFO L225 Difference]: With dead ends: 72 [2022-02-14 22:12:54,619 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 22:12:54,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:12:54,620 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:12:54,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 22:12:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 22:12:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-14 22:12:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 22:12:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-02-14 22:12:54,626 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 34 [2022-02-14 22:12:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:12:54,626 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-02-14 22:12:54,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:12:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-02-14 22:12:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 22:12:54,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:12:54,627 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:12:54,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 22:12:54,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:12:54,834 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:12:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:12:54,835 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-02-14 22:12:54,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:12:54,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21674289] [2022-02-14 22:12:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:54,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:12:54,857 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:12:54,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302886657] [2022-02-14 22:12:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:12:54,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:12:54,858 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) [2022-02-14 22:12:54,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:12:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:12:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:12:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:12:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-14 22:12:55,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:12:55,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:12:55,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21674289] [2022-02-14 22:12:55,019 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:12:55,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302886657] [2022-02-14 22:12:55,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302886657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:12:55,019 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:12:55,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:12:55,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508381396] [2022-02-14 22:12:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:12:55,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:12:55,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:12:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:12:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:12:55,021 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:12:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:12:55,497 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2022-02-14 22:12:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:12:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-14 22:12:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:12:55,499 INFO L225 Difference]: With dead ends: 66 [2022-02-14 22:12:55,499 INFO L226 Difference]: Without dead ends: 65 [2022-02-14 22:12:55,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:12:55,500 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:12:55,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 22:12:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-14 22:12:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-14 22:12:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-14 22:12:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2022-02-14 22:12:55,505 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 36 [2022-02-14 22:12:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:12:55,506 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2022-02-14 22:12:55,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:12:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2022-02-14 22:12:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-14 22:12:55,507 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:12:55,507 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:12:55,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 22:12:55,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:12:55,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:12:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:12:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-02-14 22:12:55,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:12:55,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013806516] [2022-02-14 22:12:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:55,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:12:55,731 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:12:55,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146275722] [2022-02-14 22:12:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:12:55,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:12:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:12:55,733 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) [2022-02-14 22:12:55,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process