/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/hard-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 23:07:50,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 23:07:50,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 23:07:50,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 23:07:50,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 23:07:50,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 23:07:50,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 23:07:50,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 23:07:50,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 23:07:50,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 23:07:50,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 23:07:50,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 23:07:50,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 23:07:50,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 23:07:50,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 23:07:50,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 23:07:50,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 23:07:50,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 23:07:50,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 23:07:50,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 23:07:50,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 23:07:50,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 23:07:50,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 23:07:50,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 23:07:50,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 23:07:50,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 23:07:50,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 23:07:50,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 23:07:50,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 23:07:50,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 23:07:50,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 23:07:50,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 23:07:50,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 23:07:50,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 23:07:50,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 23:07:50,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 23:07:50,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 23:07:50,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 23:07:50,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 23:07:50,296 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 23:07:50,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 23:07:50,296 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 23:07:50,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 23:07:50,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 23:07:50,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 23:07:50,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 23:07:50,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 23:07:50,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:07:50,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 23:07:50,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 23:07:50,299 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 23:07:50,299 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 23:07:50,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 23:07:50,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 23:07:50,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 23:07:50,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 23:07:50,530 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 23:07:50,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-02-14 23:07:50,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee447a82/d026a0bdd0684b1b9b39b9e988aed37c/FLAG115318bf6 [2022-02-14 23:07:50,906 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 23:07:50,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-02-14 23:07:50,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee447a82/d026a0bdd0684b1b9b39b9e988aed37c/FLAG115318bf6 [2022-02-14 23:07:50,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee447a82/d026a0bdd0684b1b9b39b9e988aed37c [2022-02-14 23:07:50,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 23:07:50,923 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 23:07:50,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 23:07:50,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 23:07:50,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 23:07:50,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:07:50" (1/1) ... [2022-02-14 23:07:50,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9c28f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:50, skipping insertion in model container [2022-02-14 23:07:50,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:07:50" (1/1) ... [2022-02-14 23:07:50,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 23:07:50,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 23:07:51,110 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/hard-ll_valuebound1.c[538,551] [2022-02-14 23:07:51,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:07:51,150 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 23:07:51,191 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/hard-ll_valuebound1.c[538,551] [2022-02-14 23:07:51,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:07:51,223 INFO L208 MainTranslator]: Completed translation [2022-02-14 23:07:51,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51 WrapperNode [2022-02-14 23:07:51,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 23:07:51,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 23:07:51,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 23:07:51,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 23:07:51,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 23:07:51,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 23:07:51,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 23:07:51,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 23:07:51,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:07:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:07:51,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 23:07:51,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 23:07:51,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 23:07:51,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 23:07:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 23:07:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 23:07:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 23:07:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 23:07:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 23:07:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 23:07:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 23:07:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 23:07:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 23:07:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 23:07:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 23:07:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 23:07:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 23:07:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 23:07:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 23:07:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 23:07:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 23:07:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 23:07:51,398 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 23:07:51,399 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 23:07:51,515 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 23:07:51,520 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 23:07:51,520 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 23:07:51,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:07:51 BoogieIcfgContainer [2022-02-14 23:07:51,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 23:07:51,522 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 23:07:51,522 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 23:07:51,524 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 23:07:51,529 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:07:51" (1/1) ... [2022-02-14 23:07:51,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:07:51 BasicIcfg [2022-02-14 23:07:51,554 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 23:07:51,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 23:07:51,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 23:07:51,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 23:07:51,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:07:50" (1/4) ... [2022-02-14 23:07:51,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65316753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:07:51, skipping insertion in model container [2022-02-14 23:07:51,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:07:51" (2/4) ... [2022-02-14 23:07:51,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65316753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:07:51, skipping insertion in model container [2022-02-14 23:07:51,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:07:51" (3/4) ... [2022-02-14 23:07:51,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65316753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:07:51, skipping insertion in model container [2022-02-14 23:07:51,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:07:51" (4/4) ... [2022-02-14 23:07:51,560 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.cJordan [2022-02-14 23:07:51,569 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 23:07:51,570 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 23:07:51,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 23:07:51,631 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 23:07:51,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 23:07:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 23:07:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:07:51,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:51,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:07:51,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-02-14 23:07:51,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:51,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026593766] [2022-02-14 23:07:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:51,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:51,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:07:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:51,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:07:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:51,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:07:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:51,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:07:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:07:51,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:51,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026593766] [2022-02-14 23:07:51,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026593766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:07:51,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:07:51,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 23:07:51,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522868637] [2022-02-14 23:07:51,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:07:51,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 23:07:51,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 23:07:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:07:51,905 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:07:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:52,016 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-14 23:07:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 23:07:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 23:07:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:52,024 INFO L225 Difference]: With dead ends: 38 [2022-02-14 23:07:52,024 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 23:07:52,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:07:52,028 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:52,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:07:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 23:07:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 23:07:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:07:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-14 23:07:52,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-02-14 23:07:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:52,062 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-14 23:07:52,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:07:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-14 23:07:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:07:52,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:52,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:07:52,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 23:07:52,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-02-14 23:07:52,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:52,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658850323] [2022-02-14 23:07:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:07:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:07:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:07:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:07:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:07:52,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:52,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658850323] [2022-02-14 23:07:52,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658850323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:07:52,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:07:52,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:07:52,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20908824] [2022-02-14 23:07:52,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:07:52,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:07:52,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:07:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:07:52,195 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 23:07:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:52,409 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-02-14 23:07:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:07:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-14 23:07:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:52,413 INFO L225 Difference]: With dead ends: 44 [2022-02-14 23:07:52,413 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 23:07:52,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:07:52,419 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:52,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:07:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 23:07:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-14 23:07:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:07:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-14 23:07:52,428 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-02-14 23:07:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:52,428 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-14 23:07:52,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 23:07:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-14 23:07:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 23:07:52,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:52,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:07:52,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 23:07:52,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-02-14 23:07:52,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:52,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362717751] [2022-02-14 23:07:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:52,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:07:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:07:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:07:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:07:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 23:07:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:07:52,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:52,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362717751] [2022-02-14 23:07:52,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362717751] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:07:52,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:07:52,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:07:52,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770192975] [2022-02-14 23:07:52,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:07:52,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:07:52,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:07:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:07:52,523 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:07:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:52,692 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-02-14 23:07:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:07:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2022-02-14 23:07:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:52,696 INFO L225 Difference]: With dead ends: 48 [2022-02-14 23:07:52,696 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 23:07:52,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:07:52,704 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:52,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:07:52,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 23:07:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-02-14 23:07:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:07:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-02-14 23:07:52,716 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-02-14 23:07:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:52,717 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-02-14 23:07:52,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:07:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-02-14 23:07:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 23:07:52,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:52,718 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:07:52,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 23:07:52,718 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-02-14 23:07:52,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:52,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964736604] [2022-02-14 23:07:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:52,739 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:07:52,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182898707] [2022-02-14 23:07:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:52,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:52,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:07:52,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:07:52,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 23:07:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 23:07:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:07:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-14 23:07:53,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:07:53,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:53,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964736604] [2022-02-14 23:07:53,063 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:07:53,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182898707] [2022-02-14 23:07:53,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182898707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:07:53,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:07:53,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 23:07:53,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700513847] [2022-02-14 23:07:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:07:53,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 23:07:53,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 23:07:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-14 23:07:53,065 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 23:07:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:53,167 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-02-14 23:07:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 23:07:53,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2022-02-14 23:07:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:53,169 INFO L225 Difference]: With dead ends: 56 [2022-02-14 23:07:53,169 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 23:07:53,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:07:53,170 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:53,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 225 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:07:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 23:07:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-14 23:07:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 23:07:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-14 23:07:53,178 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-02-14 23:07:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:53,178 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-14 23:07:53,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 23:07:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-14 23:07:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 23:07:53,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:53,180 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:07:53,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 23:07:53,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:53,402 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-02-14 23:07:53,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:53,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002144804] [2022-02-14 23:07:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:53,415 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:07:53,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518124235] [2022-02-14 23:07:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:53,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:07:53,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:07:53,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 23:07:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 23:07:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:07:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-14 23:07:53,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:07:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-14 23:07:54,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:54,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002144804] [2022-02-14 23:07:54,095 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:07:54,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518124235] [2022-02-14 23:07:54,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518124235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:07:54,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:07:54,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-02-14 23:07:54,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179320603] [2022-02-14 23:07:54,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:07:54,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 23:07:54,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 23:07:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:07:54,097 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-14 23:07:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:54,278 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-02-14 23:07:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 23:07:54,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2022-02-14 23:07:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:54,280 INFO L225 Difference]: With dead ends: 74 [2022-02-14 23:07:54,280 INFO L226 Difference]: Without dead ends: 69 [2022-02-14 23:07:54,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-14 23:07:54,281 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:54,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 232 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:07:54,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-14 23:07:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-02-14 23:07:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 23:07:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-02-14 23:07:54,288 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 45 [2022-02-14 23:07:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:54,288 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-02-14 23:07:54,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-14 23:07:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-02-14 23:07:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 23:07:54,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:54,289 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:07:54,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 23:07:54,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:54,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-02-14 23:07:54,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:54,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768512979] [2022-02-14 23:07:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:54,523 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:07:54,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381384913] [2022-02-14 23:07:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:54,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:54,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:07:54,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:07:54,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 23:07:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-14 23:07:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:07:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-02-14 23:07:54,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:07:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-02-14 23:07:54,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:54,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768512979] [2022-02-14 23:07:54,963 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:07:54,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381384913] [2022-02-14 23:07:54,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381384913] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:07:54,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:07:54,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-02-14 23:07:54,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536316449] [2022-02-14 23:07:54,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:07:54,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:07:54,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:54,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:07:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:07:54,969 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:07:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:55,009 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-02-14 23:07:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:07:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-02-14 23:07:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:55,010 INFO L225 Difference]: With dead ends: 77 [2022-02-14 23:07:55,011 INFO L226 Difference]: Without dead ends: 77 [2022-02-14 23:07:55,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:07:55,011 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:55,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:07:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-14 23:07:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-02-14 23:07:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 23:07:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-02-14 23:07:55,018 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 55 [2022-02-14 23:07:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-02-14 23:07:55,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:07:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-02-14 23:07:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 23:07:55,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:55,020 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:07:55,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 23:07:55,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:55,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -920366345, now seen corresponding path program 1 times [2022-02-14 23:07:55,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:55,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985458351] [2022-02-14 23:07:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:55,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:55,250 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:07:55,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986630456] [2022-02-14 23:07:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:55,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:07:55,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:07:55,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 23:07:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:55,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 23:07:55,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:07:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-14 23:07:55,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:07:55,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:55,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985458351] [2022-02-14 23:07:55,430 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:07:55,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986630456] [2022-02-14 23:07:55,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986630456] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:07:55,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:07:55,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 23:07:55,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751287867] [2022-02-14 23:07:55,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:07:55,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 23:07:55,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 23:07:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 23:07:55,432 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-14 23:07:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:55,461 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-02-14 23:07:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 23:07:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-02-14 23:07:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:55,463 INFO L225 Difference]: With dead ends: 75 [2022-02-14 23:07:55,463 INFO L226 Difference]: Without dead ends: 75 [2022-02-14 23:07:55,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 23:07:55,464 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:55,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:07:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-14 23:07:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-14 23:07:55,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 23:07:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-02-14 23:07:55,481 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 73 [2022-02-14 23:07:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:55,481 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-02-14 23:07:55,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-14 23:07:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-02-14 23:07:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-14 23:07:55,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:55,486 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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, 1, 1] [2022-02-14 23:07:55,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 23:07:55,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:55,708 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-02-14 23:07:55,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:55,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192733845] [2022-02-14 23:07:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:55,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:55,717 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:07:55,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159319320] [2022-02-14 23:07:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:55,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:55,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:07:55,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:07:55,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 23:07:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 23:07:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:07:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-02-14 23:07:56,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:07:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-14 23:07:57,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:07:57,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192733845] [2022-02-14 23:07:57,792 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:07:57,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159319320] [2022-02-14 23:07:57,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159319320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:07:57,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:07:57,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-02-14 23:07:57,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454664969] [2022-02-14 23:07:57,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:07:57,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 23:07:57,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:07:57,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 23:07:57,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-02-14 23:07:57,794 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-02-14 23:07:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:07:58,952 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-02-14 23:07:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 23:07:58,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 75 [2022-02-14 23:07:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:07:58,954 INFO L225 Difference]: With dead ends: 104 [2022-02-14 23:07:58,954 INFO L226 Difference]: Without dead ends: 104 [2022-02-14 23:07:58,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-14 23:07:58,955 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 23:07:58,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 289 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 23:07:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-14 23:07:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2022-02-14 23:07:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 23:07:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-02-14 23:07:58,962 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 75 [2022-02-14 23:07:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:07:58,963 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-02-14 23:07:58,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-02-14 23:07:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-02-14 23:07:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-14 23:07:58,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:07:58,964 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 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, 1] [2022-02-14 23:07:58,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 23:07:59,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:59,187 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:07:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:07:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-02-14 23:07:59,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:07:59,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336484429] [2022-02-14 23:07:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:07:59,202 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:07:59,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519601670] [2022-02-14 23:07:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:07:59,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:07:59,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:07:59,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:07:59,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 23:07:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:07:59,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 23:07:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-02-14 23:08:01,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:08:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-02-14 23:08:05,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:05,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336484429] [2022-02-14 23:08:05,322 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:05,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519601670] [2022-02-14 23:08:05,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519601670] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:08:05,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:08:05,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-02-14 23:08:05,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891983141] [2022-02-14 23:08:05,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:08:05,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 23:08:05,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 23:08:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-02-14 23:08:05,324 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-02-14 23:08:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:10,127 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2022-02-14 23:08:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 23:08:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 86 [2022-02-14 23:08:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:10,128 INFO L225 Difference]: With dead ends: 137 [2022-02-14 23:08:10,129 INFO L226 Difference]: Without dead ends: 137 [2022-02-14 23:08:10,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2022-02-14 23:08:10,130 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 61 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:10,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 407 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-14 23:08:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-14 23:08:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2022-02-14 23:08:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 74 states have internal predecessors, (82), 31 states have call successors, (31), 16 states have call predecessors, (31), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-14 23:08:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2022-02-14 23:08:10,148 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 86 [2022-02-14 23:08:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:10,149 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2022-02-14 23:08:10,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-02-14 23:08:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2022-02-14 23:08:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 23:08:10,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:10,150 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 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, 1, 1, 1] [2022-02-14 23:08:10,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 23:08:10,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:10,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-02-14 23:08:10,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:10,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124500025] [2022-02-14 23:08:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:10,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:10,359 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:10,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019573980] [2022-02-14 23:08:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:10,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:10,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:10,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:08:10,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 23:08:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:10,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 23:08:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-14 23:08:10,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:08:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-14 23:08:11,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:11,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124500025] [2022-02-14 23:08:11,025 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:11,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019573980] [2022-02-14 23:08:11,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019573980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:08:11,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:08:11,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-02-14 23:08:11,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736685835] [2022-02-14 23:08:11,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:08:11,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 23:08:11,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:11,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 23:08:11,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:08:11,027 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:08:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:11,340 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-02-14 23:08:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 23:08:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-02-14 23:08:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:11,342 INFO L225 Difference]: With dead ends: 125 [2022-02-14 23:08:11,342 INFO L226 Difference]: Without dead ends: 106 [2022-02-14 23:08:11,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-14 23:08:11,343 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:11,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 282 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 23:08:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-14 23:08:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-02-14 23:08:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-14 23:08:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-02-14 23:08:11,349 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 91 [2022-02-14 23:08:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:11,349 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-02-14 23:08:11,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:08:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-02-14 23:08:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-14 23:08:11,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:11,350 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:11,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 23:08:11,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:11,563 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:11,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1448579276, now seen corresponding path program 2 times [2022-02-14 23:08:11,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:11,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261928312] [2022-02-14 23:08:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:11,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:11,572 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:11,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306427544] [2022-02-14 23:08:11,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:08:11,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:11,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:08:11,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 23:08:11,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:08:11,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:08:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 23:08:11,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 93 proven. 4 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-02-14 23:08:11,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:08:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-02-14 23:08:12,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:12,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261928312] [2022-02-14 23:08:12,128 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:12,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306427544] [2022-02-14 23:08:12,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306427544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:08:12,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:08:12,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-02-14 23:08:12,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548050086] [2022-02-14 23:08:12,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:08:12,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:08:12,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:08:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:08:12,130 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-14 23:08:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:12,190 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-02-14 23:08:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:08:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2022-02-14 23:08:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:12,191 INFO L225 Difference]: With dead ends: 101 [2022-02-14 23:08:12,192 INFO L226 Difference]: Without dead ends: 101 [2022-02-14 23:08:12,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:08:12,192 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:12,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:08:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-14 23:08:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-14 23:08:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 23:08:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2022-02-14 23:08:12,197 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 108 [2022-02-14 23:08:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:12,197 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2022-02-14 23:08:12,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-14 23:08:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2022-02-14 23:08:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-14 23:08:12,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:12,199 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:12,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 23:08:12,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 23:08:12,411 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2022-02-14 23:08:12,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:12,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758562452] [2022-02-14 23:08:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:12,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:12,420 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:12,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311889831] [2022-02-14 23:08:12,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:08:12,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:12,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:12,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:08:12,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 23:08:12,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:08:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:08:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 23:08:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 234 proven. 21 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-02-14 23:08:12,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:08:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-02-14 23:08:13,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:13,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758562452] [2022-02-14 23:08:13,133 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:13,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311889831] [2022-02-14 23:08:13,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311889831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:08:13,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:08:13,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-02-14 23:08:13,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48578616] [2022-02-14 23:08:13,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:08:13,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 23:08:13,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 23:08:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:08:13,136 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-02-14 23:08:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:13,253 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-02-14 23:08:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:08:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 116 [2022-02-14 23:08:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:13,254 INFO L225 Difference]: With dead ends: 62 [2022-02-14 23:08:13,254 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 23:08:13,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-14 23:08:13,254 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:13,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 270 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:08:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 23:08:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 23:08:13,255 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) [2022-02-14 23:08:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 23:08:13,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-02-14 23:08:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:13,256 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 23:08:13,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-02-14 23:08:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 23:08:13,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 23:08:13,258 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 23:08:13,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 23:08:13,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:13,480 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:13,481 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 23:08:13,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:08:13 BasicIcfg [2022-02-14 23:08:13,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 23:08:13,484 INFO L158 Benchmark]: Toolchain (without parser) took 22561.24ms. Allocated memory was 194.0MB in the beginning and 318.8MB in the end (delta: 124.8MB). Free memory was 137.8MB in the beginning and 185.3MB in the end (delta: -47.5MB). Peak memory consumption was 78.7MB. Max. memory is 8.0GB. [2022-02-14 23:08:13,484 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 154.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 23:08:13,484 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.30ms. Allocated memory was 194.0MB in the beginning and 265.3MB in the end (delta: 71.3MB). Free memory was 137.6MB in the beginning and 238.2MB in the end (delta: -100.6MB). Peak memory consumption was 14.5MB. Max. memory is 8.0GB. [2022-02-14 23:08:13,484 INFO L158 Benchmark]: Boogie Preprocessor took 41.66ms. Allocated memory is still 265.3MB. Free memory was 238.2MB in the beginning and 236.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 23:08:13,485 INFO L158 Benchmark]: RCFGBuilder took 253.11ms. Allocated memory is still 265.3MB. Free memory was 236.8MB in the beginning and 224.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-14 23:08:13,485 INFO L158 Benchmark]: IcfgTransformer took 32.08ms. Allocated memory is still 265.3MB. Free memory was 224.7MB in the beginning and 223.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 23:08:13,485 INFO L158 Benchmark]: TraceAbstraction took 21927.86ms. Allocated memory was 265.3MB in the beginning and 318.8MB in the end (delta: 53.5MB). Free memory was 222.6MB in the beginning and 185.3MB in the end (delta: 37.3MB). Peak memory consumption was 91.9MB. Max. memory is 8.0GB. [2022-02-14 23:08:13,486 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 194.0MB. Free memory is still 154.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 297.30ms. Allocated memory was 194.0MB in the beginning and 265.3MB in the end (delta: 71.3MB). Free memory was 137.6MB in the beginning and 238.2MB in the end (delta: -100.6MB). Peak memory consumption was 14.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.66ms. Allocated memory is still 265.3MB. Free memory was 238.2MB in the beginning and 236.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 253.11ms. Allocated memory is still 265.3MB. Free memory was 236.8MB in the beginning and 224.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 32.08ms. Allocated memory is still 265.3MB. Free memory was 224.7MB in the beginning and 223.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 21927.86ms. Allocated memory was 265.3MB in the beginning and 318.8MB in the end (delta: 53.5MB). Free memory was 222.6MB in the beginning and 185.3MB in the end (delta: 37.3MB). Peak memory consumption was 91.9MB. 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.9s, OverallIterations: 12, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 366 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 319 mSDsluCounter, 2223 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1718 mSDsCounter, 416 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1314 IncrementalHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 416 mSolverCounterUnsat, 505 mSDtfsCounter, 1314 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1335 GetRequests, 1193 SyntacticMatches, 12 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=9, InterpolantAutomatonStates: 98, 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, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 776 NumberOfCodeBlocks, 776 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1333 ConstructedInterpolants, 0 QuantifiedInterpolants, 7037 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1620 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 3367/3483 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! [2022-02-14 23:08:13,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...