/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/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:13:25,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:13:25,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:13:25,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 17:13:25,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 17:13:25,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 17:13:25,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 17:13:25,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 17:13:25,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 17:13:25,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 17:13:25,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 17:13:25,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 17:13:25,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:13:25,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:13:25,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:13:25,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:13:25,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:13:25,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:13:25,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:13:25,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:13:25,412 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:13:25,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:13:25,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:13:25,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:13:25,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:13:25,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:13:25,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:13:25,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:13:25,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:13:25,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:13:25,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:13:25,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:13:25,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:13:25,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:13:25,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:13:25,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:13:25,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:13:25,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:13:25,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:13:25,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:13:25,440 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:13:25,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:13:25,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:13:25,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:13:25,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:13:25,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:13:25,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:13:25,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:13:25,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:13:25,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:13:25,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:13:25,442 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:13:25,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:13:25,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:13:25,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:13:25,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:13:25,659 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:13:25,660 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:13:25,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-03-18 17:13:25,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badf22764/09d8cd445886406f999cb53204604217/FLAGb2f0988c8 [2022-03-18 17:13:26,025 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:13:26,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-03-18 17:13:26,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badf22764/09d8cd445886406f999cb53204604217/FLAGb2f0988c8 [2022-03-18 17:13:26,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badf22764/09d8cd445886406f999cb53204604217 [2022-03-18 17:13:26,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:13:26,457 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:13:26,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:13:26,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:13:26,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:13:26,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6f3adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26, skipping insertion in model container [2022-03-18 17:13:26,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:13:26,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:13:26,608 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2022-03-18 17:13:26,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:13:26,651 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:13:26,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2022-03-18 17:13:26,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:13:26,688 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:13:26,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26 WrapperNode [2022-03-18 17:13:26,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:13:26,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:13:26,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:13:26,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:13:26,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:13:26,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:13:26,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:13:26,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:13:26,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:26,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:13:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:13:26,758 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) [2022-03-18 17:13:26,764 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 [2022-03-18 17:13:26,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:13:26,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:13:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:13:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 17:13:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:13:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:13:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:13:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:13:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 17:13:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 17:13:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:13:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:13:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 17:13:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:13:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 17:13:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:13:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:13:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:13:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:13:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:13:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:13:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:13:26,852 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:13:26,853 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:13:26,973 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:13:26,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:13:26,978 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 17:13:26,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:13:26 BoogieIcfgContainer [2022-03-18 17:13:26,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:13:26,980 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:13:26,980 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:13:26,980 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:13:26,982 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:13:26" (1/1) ... [2022-03-18 17:13:27,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:13:27 BasicIcfg [2022-03-18 17:13:27,000 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:13:27,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:13:27,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:13:27,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:13:27,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:13:26" (1/4) ... [2022-03-18 17:13:27,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1e70ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:13:27, skipping insertion in model container [2022-03-18 17:13:27,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:26" (2/4) ... [2022-03-18 17:13:27,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1e70ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:13:27, skipping insertion in model container [2022-03-18 17:13:27,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:13:26" (3/4) ... [2022-03-18 17:13:27,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1e70ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:13:27, skipping insertion in model container [2022-03-18 17:13:27,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:13:27" (4/4) ... [2022-03-18 17:13:27,009 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.iJordan [2022-03-18 17:13:27,012 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:13:27,012 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:13:27,038 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:13:27,043 INFO L340 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 [2022-03-18 17:13:27,043 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:13:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 17:13:27,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:27,056 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:27,057 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash -868390563, now seen corresponding path program 1 times [2022-03-18 17:13:27,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:27,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290116306] [2022-03-18 17:13:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:27,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:27,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:13:27,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:27,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290116306] [2022-03-18 17:13:27,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290116306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:27,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:27,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 17:13:27,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883665385] [2022-03-18 17:13:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:27,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 17:13:27,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:27,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 17:13:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 17:13:27,304 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:13:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:27,558 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-03-18 17:13:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:13:27,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 17:13:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:27,565 INFO L225 Difference]: With dead ends: 52 [2022-03-18 17:13:27,565 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 17:13:27,566 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:13:27,568 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:27,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:13:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 17:13:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-03-18 17:13:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-18 17:13:27,596 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-03-18 17:13:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:27,597 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-18 17:13:27,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:13:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-18 17:13:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 17:13:27,598 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:27,598 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:27,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:13:27,598 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash -867437251, now seen corresponding path program 1 times [2022-03-18 17:13:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:27,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671953416] [2022-03-18 17:13:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:27,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:13:27,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:27,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671953416] [2022-03-18 17:13:27,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671953416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:27,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:27,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 17:13:27,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422193282] [2022-03-18 17:13:27,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:27,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 17:13:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 17:13:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 17:13:27,683 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:13:27,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:27,836 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-18 17:13:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:13:27,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 17:13:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:27,841 INFO L225 Difference]: With dead ends: 53 [2022-03-18 17:13:27,841 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 17:13:27,845 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:13:27,846 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:27,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 17:13:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-03-18 17:13:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-03-18 17:13:27,862 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2022-03-18 17:13:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:27,862 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-03-18 17:13:27,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:13:27,862 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-03-18 17:13:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 17:13:27,863 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:27,863 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:27,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:13:27,863 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:27,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1607544442, now seen corresponding path program 1 times [2022-03-18 17:13:27,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:27,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555256887] [2022-03-18 17:13:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:27,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:27,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 17:13:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:13:27,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555256887] [2022-03-18 17:13:27,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555256887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:27,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:27,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 17:13:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484853530] [2022-03-18 17:13:27,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:27,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 17:13:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 17:13:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 17:13:27,947 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:13:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:28,097 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-03-18 17:13:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:13:28,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-03-18 17:13:28,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:28,098 INFO L225 Difference]: With dead ends: 55 [2022-03-18 17:13:28,098 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 17:13:28,098 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:13:28,099 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:28,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 17:13:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 17:13:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-03-18 17:13:28,104 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2022-03-18 17:13:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:28,104 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-03-18 17:13:28,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:13:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-03-18 17:13:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 17:13:28,105 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:28,105 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:28,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 17:13:28,105 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1153064602, now seen corresponding path program 1 times [2022-03-18 17:13:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:28,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128284349] [2022-03-18 17:13:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 17:13:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 17:13:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 17:13:28,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:28,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128284349] [2022-03-18 17:13:28,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128284349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:28,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:28,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 17:13:28,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795393106] [2022-03-18 17:13:28,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:28,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 17:13:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 17:13:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 17:13:28,178 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 17:13:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:28,350 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-03-18 17:13:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 17:13:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-18 17:13:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:28,351 INFO L225 Difference]: With dead ends: 59 [2022-03-18 17:13:28,351 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 17:13:28,352 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:13:28,352 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:28,353 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 59 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 17:13:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-18 17:13:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-03-18 17:13:28,357 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2022-03-18 17:13:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:28,357 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-03-18 17:13:28,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 17:13:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-03-18 17:13:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 17:13:28,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:28,358 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:28,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 17:13:28,358 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1359459551, now seen corresponding path program 1 times [2022-03-18 17:13:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:28,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749468559] [2022-03-18 17:13:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 17:13:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 17:13:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 17:13:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 17:13:28,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:28,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749468559] [2022-03-18 17:13:28,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749468559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:28,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:28,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 17:13:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964063039] [2022-03-18 17:13:28,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:28,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 17:13:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 17:13:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 17:13:28,432 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 17:13:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:28,563 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-03-18 17:13:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:13:28,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-18 17:13:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:28,565 INFO L225 Difference]: With dead ends: 64 [2022-03-18 17:13:28,565 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 17:13:28,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:13:28,566 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:28,566 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 17:13:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-18 17:13:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-18 17:13:28,570 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2022-03-18 17:13:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:28,570 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-18 17:13:28,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 17:13:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-18 17:13:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 17:13:28,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:28,571 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:28,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 17:13:28,572 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:28,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1056918318, now seen corresponding path program 1 times [2022-03-18 17:13:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:28,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535761168] [2022-03-18 17:13:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 17:13:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 17:13:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 17:13:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 17:13:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 17:13:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 17:13:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 17:13:28,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535761168] [2022-03-18 17:13:28,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535761168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:28,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:28,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 17:13:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020633686] [2022-03-18 17:13:28,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:28,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 17:13:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 17:13:28,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-18 17:13:28,670 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 17:13:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:28,824 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-03-18 17:13:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 17:13:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 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 47 [2022-03-18 17:13:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:28,826 INFO L225 Difference]: With dead ends: 73 [2022-03-18 17:13:28,826 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 17:13:28,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:13:28,826 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:28,827 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 17:13:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-03-18 17:13:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-18 17:13:28,831 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2022-03-18 17:13:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:28,831 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-18 17:13:28,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 17:13:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-18 17:13:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 17:13:28,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:28,832 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:28,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 17:13:28,833 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1366093938, now seen corresponding path program 1 times [2022-03-18 17:13:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:28,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621027589] [2022-03-18 17:13:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 17:13:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 17:13:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 17:13:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 17:13:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 17:13:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 17:13:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:13:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 17:13:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 17:13:28,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:28,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621027589] [2022-03-18 17:13:28,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621027589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:28,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:28,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 17:13:28,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629221325] [2022-03-18 17:13:28,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:28,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 17:13:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 17:13:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 17:13:28,904 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 17:13:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:29,066 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-03-18 17:13:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:13:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-03-18 17:13:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:29,067 INFO L225 Difference]: With dead ends: 73 [2022-03-18 17:13:29,067 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 17:13:29,068 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 17:13:29,068 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:29,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 17:13:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-03-18 17:13:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 17:13:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-03-18 17:13:29,072 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2022-03-18 17:13:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:29,073 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-03-18 17:13:29,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 17:13:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-03-18 17:13:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 17:13:29,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:29,074 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:29,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 17:13:29,074 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash -430516171, now seen corresponding path program 1 times [2022-03-18 17:13:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417705147] [2022-03-18 17:13:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 17:13:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 17:13:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 17:13:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 17:13:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 17:13:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 17:13:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:13:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 17:13:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-18 17:13:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 17:13:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 17:13:29,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:29,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417705147] [2022-03-18 17:13:29,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417705147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:29,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:29,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 17:13:29,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957083565] [2022-03-18 17:13:29,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:29,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 17:13:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 17:13:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-18 17:13:29,191 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 17:13:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:29,352 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-03-18 17:13:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 17:13:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2022-03-18 17:13:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:29,353 INFO L225 Difference]: With dead ends: 71 [2022-03-18 17:13:29,353 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 17:13:29,354 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-18 17:13:29,354 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:29,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 17:13:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 17:13:29,355 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) [2022-03-18 17:13:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 17:13:29,355 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2022-03-18 17:13:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:29,355 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 17:13:29,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 17:13:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 17:13:29,356 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 17:13:29,358 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 17:13:29,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 17:13:29,360 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:29,361 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 17:13:29,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:13:29 BasicIcfg [2022-03-18 17:13:29,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 17:13:29,363 INFO L158 Benchmark]: Toolchain (without parser) took 2906.25ms. Allocated memory was 192.9MB in the beginning and 276.8MB in the end (delta: 83.9MB). Free memory was 136.3MB in the beginning and 122.3MB in the end (delta: 14.1MB). Peak memory consumption was 99.2MB. Max. memory is 8.0GB. [2022-03-18 17:13:29,363 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory is still 152.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 17:13:29,364 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.60ms. Allocated memory was 192.9MB in the beginning and 276.8MB in the end (delta: 83.9MB). Free memory was 136.2MB in the beginning and 247.9MB in the end (delta: -111.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-03-18 17:13:29,364 INFO L158 Benchmark]: Boogie Preprocessor took 38.35ms. Allocated memory is still 276.8MB. Free memory was 247.9MB in the beginning and 246.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 17:13:29,364 INFO L158 Benchmark]: RCFGBuilder took 250.10ms. Allocated memory is still 276.8MB. Free memory was 246.3MB in the beginning and 233.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-18 17:13:29,364 INFO L158 Benchmark]: IcfgTransformer took 20.76ms. Allocated memory is still 276.8MB. Free memory was 233.8MB in the beginning and 232.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 17:13:29,364 INFO L158 Benchmark]: TraceAbstraction took 2361.41ms. Allocated memory is still 276.8MB. Free memory was 231.7MB in the beginning and 122.3MB in the end (delta: 109.4MB). Peak memory consumption was 111.0MB. Max. memory is 8.0GB. [2022-03-18 17:13:29,365 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory is still 152.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 231.60ms. Allocated memory was 192.9MB in the beginning and 276.8MB in the end (delta: 83.9MB). Free memory was 136.2MB in the beginning and 247.9MB in the end (delta: -111.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.35ms. Allocated memory is still 276.8MB. Free memory was 247.9MB in the beginning and 246.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 250.10ms. Allocated memory is still 276.8MB. Free memory was 246.3MB in the beginning and 233.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 20.76ms. Allocated memory is still 276.8MB. Free memory was 233.8MB in the beginning and 232.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 2361.41ms. Allocated memory is still 276.8MB. Free memory was 231.7MB in the beginning and 122.3MB in the end (delta: 109.4MB). Peak memory consumption was 111.0MB. 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: 19]: 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 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 250 mSDsluCounter, 459 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 489 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1489 IncrementalHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 489 mSolverCounterUnsat, 294 mSDtfsCounter, 1489 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 63, 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, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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! [2022-03-18 17:13:29,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...