/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/cohencu-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:42:12,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:42:12,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:42:12,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:42:12,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:42:12,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:42:12,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:42:12,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:42:12,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:42:12,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:42:12,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:42:12,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:42:12,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:42:12,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:42:12,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:42:12,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:42:12,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:42:12,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:42:12,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:42:12,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:42:12,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:42:12,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:42:12,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:42:12,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:42:12,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:42:12,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:42:12,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:42:12,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:42:12,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:42:12,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:42:12,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:42:12,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:42:12,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:42:12,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:42:12,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:42:12,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:42:12,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:42:12,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:42:12,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:42:12,471 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:42:12,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:42:12,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:42:12,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:42:12,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:42:12,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:42:12,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:42:12,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:42:12,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:42:12,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:42:12,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:42:12,473 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:42:12,473 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:42:12,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:42:12,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:42:12,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:42:12,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:42:12,730 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:42:12,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2022-01-31 13:42:12,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/652b59dfc/bfb40efded8144f9b20eb46939feb852/FLAGcb834d5da [2022-01-31 13:42:13,096 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:42:13,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2022-01-31 13:42:13,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/652b59dfc/bfb40efded8144f9b20eb46939feb852/FLAGcb834d5da [2022-01-31 13:42:13,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/652b59dfc/bfb40efded8144f9b20eb46939feb852 [2022-01-31 13:42:13,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:42:13,514 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:42:13,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:42:13,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:42:13,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:42:13,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d49867c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13, skipping insertion in model container [2022-01-31 13:42:13,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:42:13,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:42:13,655 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/cohencu-ll_valuebound1.c[588,601] [2022-01-31 13:42:13,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:42:13,696 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:42:13,705 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/cohencu-ll_valuebound1.c[588,601] [2022-01-31 13:42:13,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:42:13,723 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:42:13,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13 WrapperNode [2022-01-31 13:42:13,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:42:13,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:42:13,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:42:13,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:42:13,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:42:13,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:42:13,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:42:13,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:42:13,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:13,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:42:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:13,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 13:42:13,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 13:42:13,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:42:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:42:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:42:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:42:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:42:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:42:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:42:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:42:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:42:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:42:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-01-31 13:42:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:42:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:42:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:42:13,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:42:13,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:42:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:42:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:42:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:42:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:42:13,874 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:42:13,876 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:42:13,976 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:42:13,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:42:13,981 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 13:42:13,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:42:13 BoogieIcfgContainer [2022-01-31 13:42:13,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:42:13,983 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:42:13,984 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:42:13,988 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:42:13,990 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:42:13" (1/1) ... [2022-01-31 13:42:14,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:42:14 BasicIcfg [2022-01-31 13:42:14,005 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:42:14,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:42:14,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:42:14,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:42:14,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:42:13" (1/4) ... [2022-01-31 13:42:14,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbe72ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:42:14, skipping insertion in model container [2022-01-31 13:42:14,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:42:13" (2/4) ... [2022-01-31 13:42:14,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbe72ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:42:14, skipping insertion in model container [2022-01-31 13:42:14,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:42:13" (3/4) ... [2022-01-31 13:42:14,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbe72ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:42:14, skipping insertion in model container [2022-01-31 13:42:14,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:42:14" (4/4) ... [2022-01-31 13:42:14,012 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound1.cJordan [2022-01-31 13:42:14,015 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:42:14,016 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:42:14,051 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:42:14,056 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 13:42:14,056 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:42:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 13:42:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 13:42:14,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:14,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:14,072 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-01-31 13:42:14,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942690404] [2022-01-31 13:42:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:14,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:42:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:14,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:42:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:42:14,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:14,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942690404] [2022-01-31 13:42:14,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942690404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:42:14,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:42:14,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:42:14,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542236492] [2022-01-31 13:42:14,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:42:14,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:42:14,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:42:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:42:14,257 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:42:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:14,352 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-01-31 13:42:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:42:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2022-01-31 13:42:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:14,360 INFO L225 Difference]: With dead ends: 36 [2022-01-31 13:42:14,360 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 13:42:14,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:42:14,364 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:14,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:42:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 13:42:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 13:42:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 13:42:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-01-31 13:42:14,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-01-31 13:42:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:14,426 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-01-31 13:42:14,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:42:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-01-31 13:42:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 13:42:14,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:14,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:14,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:42:14,441 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-01-31 13:42:14,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:14,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780595228] [2022-01-31 13:42:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:14,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:42:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:42:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:42:14,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:14,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780595228] [2022-01-31 13:42:14,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780595228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:42:14,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:42:14,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 13:42:14,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349515457] [2022-01-31 13:42:14,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:42:14,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 13:42:14,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:14,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 13:42:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:42:14,602 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:42:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:14,793 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-01-31 13:42:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:42:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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 17 [2022-01-31 13:42:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:14,797 INFO L225 Difference]: With dead ends: 35 [2022-01-31 13:42:14,797 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 13:42:14,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:42:14,806 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:14,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:42:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 13:42:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 13:42:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 13:42:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-01-31 13:42:14,821 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-01-31 13:42:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:14,821 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-01-31 13:42:14,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:42:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-01-31 13:42:14,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 13:42:14,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:14,822 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:14,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 13:42:14,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-01-31 13:42:14,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184658448] [2022-01-31 13:42:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:14,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:14,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:14,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612139065] [2022-01-31 13:42:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:14,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:14,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:14,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:42:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:14,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:42:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:42:15,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:42:15,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:15,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184658448] [2022-01-31 13:42:15,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:15,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612139065] [2022-01-31 13:42:15,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612139065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:42:15,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:42:15,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:42:15,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158441375] [2022-01-31 13:42:15,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:42:15,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:42:15,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:15,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:42:15,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:42:15,052 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:42:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:15,106 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-01-31 13:42:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:42:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 13:42:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:15,109 INFO L225 Difference]: With dead ends: 52 [2022-01-31 13:42:15,109 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 13:42:15,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:42:15,112 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:15,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:42:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 13:42:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-01-31 13:42:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 13:42:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-01-31 13:42:15,131 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-01-31 13:42:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:15,132 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-01-31 13:42:15,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:42:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-01-31 13:42:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 13:42:15,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:15,133 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:15,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:15,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:15,362 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-01-31 13:42:15,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057351559] [2022-01-31 13:42:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:15,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:15,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:15,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816399908] [2022-01-31 13:42:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:15,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:15,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:15,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:15,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:42:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:42:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:42:15,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:42:15,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057351559] [2022-01-31 13:42:15,521 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816399908] [2022-01-31 13:42:15,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816399908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:42:15,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:42:15,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:42:15,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481574319] [2022-01-31 13:42:15,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:42:15,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:42:15,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:42:15,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:42:15,528 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 13:42:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:15,579 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-01-31 13:42:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:42:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-01-31 13:42:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:15,582 INFO L225 Difference]: With dead ends: 56 [2022-01-31 13:42:15,582 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 13:42:15,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:42:15,584 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:15,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:42:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 13:42:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-01-31 13:42:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 13:42:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-01-31 13:42:15,595 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-01-31 13:42:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:15,595 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-01-31 13:42:15,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 13:42:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-01-31 13:42:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 13:42:15,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:15,597 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:15,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:15,809 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,SelfDestructingSolverStorable3 [2022-01-31 13:42:15,810 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-01-31 13:42:15,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807656078] [2022-01-31 13:42:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:15,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:15,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:15,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052410406] [2022-01-31 13:42:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:15,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:15,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:15,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:15,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 13:42:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:42:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 13:42:15,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:42:15,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:15,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807656078] [2022-01-31 13:42:15,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052410406] [2022-01-31 13:42:15,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052410406] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:42:15,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:42:15,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:42:15,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347813661] [2022-01-31 13:42:15,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:42:15,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:42:15,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:42:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:42:15,977 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-01-31 13:42:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:16,040 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-01-31 13:42:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:42:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 32 [2022-01-31 13:42:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:16,042 INFO L225 Difference]: With dead ends: 64 [2022-01-31 13:42:16,043 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 13:42:16,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:42:16,044 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:16,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:42:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 13:42:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 13:42:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 13:42:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-01-31 13:42:16,055 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-01-31 13:42:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:16,056 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-01-31 13:42:16,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-01-31 13:42:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-01-31 13:42:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 13:42:16,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:16,058 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-01-31 13:42:16,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:16,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:16,284 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:16,285 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-01-31 13:42:16,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:16,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624990610] [2022-01-31 13:42:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:16,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:16,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868578067] [2022-01-31 13:42:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:16,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:16,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 13:42:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:42:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 13:42:16,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 13:42:16,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:16,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624990610] [2022-01-31 13:42:16,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:16,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868578067] [2022-01-31 13:42:16,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868578067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:42:16,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:42:16,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 13:42:16,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247607659] [2022-01-31 13:42:16,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:16,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:42:16,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:42:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:42:16,662 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 13:42:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:16,990 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-01-31 13:42:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:42:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-01-31 13:42:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:16,992 INFO L225 Difference]: With dead ends: 75 [2022-01-31 13:42:16,993 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 13:42:16,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:42:16,994 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:16,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:42:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 13:42:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-01-31 13:42:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 13:42:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-01-31 13:42:17,019 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-01-31 13:42:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:17,020 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-01-31 13:42:17,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 13:42:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-01-31 13:42:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 13:42:17,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:17,021 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-01-31 13:42:17,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:17,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:17,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-01-31 13:42:17,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:17,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580536856] [2022-01-31 13:42:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:17,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:17,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:17,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976251517] [2022-01-31 13:42:17,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:42:17,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:17,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:17,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:17,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 13:42:17,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:42:17,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:42:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:42:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 13:42:17,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 13:42:17,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:17,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580536856] [2022-01-31 13:42:17,589 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976251517] [2022-01-31 13:42:17,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976251517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:42:17,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:42:17,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 13:42:17,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844058854] [2022-01-31 13:42:17,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:42:17,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:42:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:42:17,591 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 13:42:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:17,677 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-01-31 13:42:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:42:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2022-01-31 13:42:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:17,678 INFO L225 Difference]: With dead ends: 79 [2022-01-31 13:42:17,678 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 13:42:17,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 13:42:17,679 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:17,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 240 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:42:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 13:42:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-01-31 13:42:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 13:42:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-01-31 13:42:17,685 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-01-31 13:42:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:17,685 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-01-31 13:42:17,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 13:42:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-01-31 13:42:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 13:42:17,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:17,687 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:17,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 13:42:17,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:17,899 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-01-31 13:42:17,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:17,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389648649] [2022-01-31 13:42:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:17,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:17,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128240255] [2022-01-31 13:42:17,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:42:17,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:17,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:17,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:17,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 13:42:17,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 13:42:17,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:42:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 13:42:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 13:42:18,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 13:42:18,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389648649] [2022-01-31 13:42:18,398 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128240255] [2022-01-31 13:42:18,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128240255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:42:18,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:42:18,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 13:42:18,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525831408] [2022-01-31 13:42:18,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:18,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:42:18,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:42:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:42:18,400 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 13:42:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:18,666 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-01-31 13:42:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:42:18,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2022-01-31 13:42:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:18,667 INFO L225 Difference]: With dead ends: 91 [2022-01-31 13:42:18,667 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 13:42:18,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:42:18,668 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:18,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 212 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:42:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 13:42:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-01-31 13:42:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 48 states have internal predecessors, (48), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 13:42:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-01-31 13:42:18,673 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-01-31 13:42:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:18,673 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-01-31 13:42:18,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 13:42:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-01-31 13:42:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 13:42:18,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:18,675 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:18,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:18,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:18,880 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-01-31 13:42:18,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431343871] [2022-01-31 13:42:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:18,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:18,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:18,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335250837] [2022-01-31 13:42:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:18,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:18,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:18,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:18,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 13:42:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:18,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 13:42:18,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-31 13:42:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:19,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431343871] [2022-01-31 13:42:19,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335250837] [2022-01-31 13:42:19,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335250837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:42:19,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:42:19,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-01-31 13:42:19,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926128450] [2022-01-31 13:42:19,488 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:19,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 13:42:19,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:19,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 13:42:19,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:42:19,492 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 13:42:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:19,591 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-01-31 13:42:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:42:19,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-01-31 13:42:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:19,595 INFO L225 Difference]: With dead ends: 93 [2022-01-31 13:42:19,595 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 13:42:19,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:42:19,597 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:19,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:42:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 13:42:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-01-31 13:42:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 13:42:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-01-31 13:42:19,613 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-01-31 13:42:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:19,614 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-01-31 13:42:19,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 13:42:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-01-31 13:42:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 13:42:19,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:19,620 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:19,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:19,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:19,839 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-01-31 13:42:19,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:19,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361328795] [2022-01-31 13:42:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:19,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:19,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:19,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710809362] [2022-01-31 13:42:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:19,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:19,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:19,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:19,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 13:42:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:42:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 13:42:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-01-31 13:42:20,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:28,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:28,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361328795] [2022-01-31 13:42:28,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:28,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710809362] [2022-01-31 13:42:28,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710809362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:42:28,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:42:28,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-01-31 13:42:28,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657188519] [2022-01-31 13:42:28,483 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:28,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 13:42:28,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 13:42:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-31 13:42:28,485 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 13:42:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:29,657 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-01-31 13:42:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 13:42:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2022-01-31 13:42:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:29,659 INFO L225 Difference]: With dead ends: 101 [2022-01-31 13:42:29,659 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 13:42:29,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-31 13:42:29,660 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:29,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 205 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:42:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 13:42:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-01-31 13:42:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 13:42:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-01-31 13:42:29,665 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-01-31 13:42:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:29,665 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-01-31 13:42:29,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 13:42:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-01-31 13:42:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 13:42:29,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:29,666 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:29,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:29,867 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,SelfDestructingSolverStorable9 [2022-01-31 13:42:29,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-01-31 13:42:29,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132352465] [2022-01-31 13:42:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:29,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:29,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735371107] [2022-01-31 13:42:29,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 13:42:29,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:29,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:29,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:29,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 13:42:29,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 13:42:29,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:42:29,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 13:42:29,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-01-31 13:42:30,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-01-31 13:42:30,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:30,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132352465] [2022-01-31 13:42:30,410 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:30,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735371107] [2022-01-31 13:42:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735371107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:42:30,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:42:30,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 13:42:30,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393095200] [2022-01-31 13:42:30,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:30,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 13:42:30,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 13:42:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:42:30,413 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-01-31 13:42:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:30,796 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-01-31 13:42:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:42:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 81 [2022-01-31 13:42:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:30,797 INFO L225 Difference]: With dead ends: 104 [2022-01-31 13:42:30,797 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 13:42:30,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:42:30,798 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:30,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 195 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:42:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 13:42:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-01-31 13:42:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 13:42:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-01-31 13:42:30,804 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-01-31 13:42:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:30,804 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-01-31 13:42:30,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-01-31 13:42:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-01-31 13:42:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 13:42:30,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:30,805 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:30,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:31,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:31,020 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-01-31 13:42:31,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:31,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883249788] [2022-01-31 13:42:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:31,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:31,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:31,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548121710] [2022-01-31 13:42:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:42:31,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:31,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:31,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 13:42:31,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:42:31,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:42:31,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 13:42:31,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 13:42:31,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:31,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883249788] [2022-01-31 13:42:31,712 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548121710] [2022-01-31 13:42:31,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548121710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:42:31,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:42:31,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-01-31 13:42:31,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226443998] [2022-01-31 13:42:31,713 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:31,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:42:31,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:42:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:42:31,714 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 13:42:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:31,846 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-01-31 13:42:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:42:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-01-31 13:42:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:31,847 INFO L225 Difference]: With dead ends: 116 [2022-01-31 13:42:31,847 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 13:42:31,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-31 13:42:31,848 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:31,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 290 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:42:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 13:42:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-01-31 13:42:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 13:42:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-01-31 13:42:31,853 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-01-31 13:42:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:31,853 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-01-31 13:42:31,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 13:42:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-01-31 13:42:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 13:42:31,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:31,854 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:31,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:32,075 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,SelfDestructingSolverStorable11 [2022-01-31 13:42:32,076 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-01-31 13:42:32,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:32,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744552488] [2022-01-31 13:42:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:32,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:32,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:32,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400349451] [2022-01-31 13:42:32,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:42:32,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:32,085 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:32,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 13:42:32,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:42:32,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:42:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 13:42:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-01-31 13:42:32,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:32,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744552488] [2022-01-31 13:42:32,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400349451] [2022-01-31 13:42:32,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400349451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:42:32,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:42:32,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-01-31 13:42:32,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939236375] [2022-01-31 13:42:32,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:32,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:42:32,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:42:32,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:42:32,674 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-31 13:42:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:32,788 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-01-31 13:42:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:42:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-01-31 13:42:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:32,789 INFO L225 Difference]: With dead ends: 124 [2022-01-31 13:42:32,789 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 13:42:32,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-31 13:42:32,790 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:32,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 299 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:42:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 13:42:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-01-31 13:42:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 26 states have call successors, (26), 20 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 13:42:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-01-31 13:42:32,795 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-01-31 13:42:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:32,795 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-01-31 13:42:32,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-31 13:42:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-01-31 13:42:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 13:42:32,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:32,797 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:32,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:33,011 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,SelfDestructingSolverStorable12 [2022-01-31 13:42:33,011 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-01-31 13:42:33,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:33,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958732432] [2022-01-31 13:42:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:33,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:33,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:33,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003363628] [2022-01-31 13:42:33,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:42:33,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:33,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:33,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 13:42:33,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 13:42:33,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:42:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 13:42:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-01-31 13:42:33,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:33,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958732432] [2022-01-31 13:42:33,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003363628] [2022-01-31 13:42:33,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003363628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:42:33,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:42:33,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-01-31 13:42:33,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85344114] [2022-01-31 13:42:33,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:33,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 13:42:33,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 13:42:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-31 13:42:33,611 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 13:42:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:33,746 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-01-31 13:42:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 13:42:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2022-01-31 13:42:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:33,747 INFO L225 Difference]: With dead ends: 117 [2022-01-31 13:42:33,747 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 13:42:33,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-31 13:42:33,748 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:33,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 187 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:42:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 13:42:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-01-31 13:42:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 21 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 13:42:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-01-31 13:42:33,752 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-01-31 13:42:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:33,753 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-01-31 13:42:33,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 13:42:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-01-31 13:42:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 13:42:33,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:42:33,754 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:42:33,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:33,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 13:42:33,978 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:42:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:42:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-01-31 13:42:33,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:42:33,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324951192] [2022-01-31 13:42:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:42:33,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:42:33,991 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:42:33,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259499966] [2022-01-31 13:42:33,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:42:33,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:42:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:42:33,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:42:33,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 13:42:34,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 13:42:34,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:42:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 13:42:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:42:45,504 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 13:42:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 261 proven. 74 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-01-31 13:42:45,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:42:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-01-31 13:42:51,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:42:51,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324951192] [2022-01-31 13:42:51,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:42:51,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259499966] [2022-01-31 13:42:51,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259499966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:42:51,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:42:51,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-01-31 13:42:51,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605897775] [2022-01-31 13:42:51,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:42:51,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 13:42:51,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:42:51,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 13:42:51,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-31 13:42:51,173 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-01-31 13:42:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:42:51,990 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-01-31 13:42:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 13:42:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 134 [2022-01-31 13:42:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:42:51,991 INFO L225 Difference]: With dead ends: 113 [2022-01-31 13:42:51,991 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 13:42:51,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-01-31 13:42:51,992 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:42:51,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 148 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:42:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 13:42:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 13:42:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 13:42:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 13:42:51,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-01-31 13:42:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:42:51,993 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 13:42:51,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-01-31 13:42:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 13:42:51,993 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 13:42:51,995 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 13:42:52,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 13:42:52,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 13:42:52,203 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-01-31 13:42:52,204 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 13:42:52,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:42:52 BasicIcfg [2022-01-31 13:42:52,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 13:42:52,206 INFO L158 Benchmark]: Toolchain (without parser) took 38692.24ms. Allocated memory was 205.5MB in the beginning and 296.7MB in the end (delta: 91.2MB). Free memory was 150.3MB in the beginning and 202.0MB in the end (delta: -51.7MB). Peak memory consumption was 40.3MB. Max. memory is 8.0GB. [2022-01-31 13:42:52,206 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 205.5MB. Free memory is still 166.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 13:42:52,206 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.60ms. Allocated memory was 205.5MB in the beginning and 296.7MB in the end (delta: 91.2MB). Free memory was 150.1MB in the beginning and 267.0MB in the end (delta: -116.8MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-01-31 13:42:52,207 INFO L158 Benchmark]: Boogie Preprocessor took 23.18ms. Allocated memory is still 296.7MB. Free memory was 267.0MB in the beginning and 265.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 13:42:52,207 INFO L158 Benchmark]: RCFGBuilder took 233.22ms. Allocated memory is still 296.7MB. Free memory was 265.4MB in the beginning and 253.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 13:42:52,207 INFO L158 Benchmark]: IcfgTransformer took 21.61ms. Allocated memory is still 296.7MB. Free memory was 253.4MB in the beginning and 251.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 13:42:52,207 INFO L158 Benchmark]: TraceAbstraction took 38199.09ms. Allocated memory is still 296.7MB. Free memory was 251.3MB in the beginning and 202.0MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. [2022-01-31 13:42:52,208 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 205.5MB. Free memory is still 166.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.60ms. Allocated memory was 205.5MB in the beginning and 296.7MB in the end (delta: 91.2MB). Free memory was 150.1MB in the beginning and 267.0MB in the end (delta: -116.8MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.18ms. Allocated memory is still 296.7MB. Free memory was 267.0MB in the beginning and 265.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 233.22ms. Allocated memory is still 296.7MB. Free memory was 265.4MB in the beginning and 253.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 21.61ms. Allocated memory is still 296.7MB. Free memory was 253.4MB in the beginning and 251.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 38199.09ms. Allocated memory is still 296.7MB. Free memory was 251.3MB in the beginning and 202.0MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38.2s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 227 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 163 mSDsluCounter, 2770 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2168 mSDsCounter, 369 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1646 IncrementalHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 369 mSolverCounterUnsat, 602 mSDtfsCounter, 1646 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1533 GetRequests, 1371 SyntacticMatches, 11 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=12, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 30.0s InterpolantComputationTime, 985 NumberOfCodeBlocks, 797 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1342 ConstructedInterpolants, 0 QuantifiedInterpolants, 5774 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1925 ConjunctsInSsa, 255 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5635/5874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 13:42:52,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...