/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/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:51:04,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:51:04,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:51:04,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 20:51:04,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 20:51:04,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 20:51:04,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 20:51:04,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 20:51:04,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 20:51:04,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 20:51:04,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 20:51:04,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 20:51:04,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:51:04,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:51:04,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:51:04,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:51:04,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:51:04,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:51:04,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:51:04,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:51:04,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:51:04,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:51:04,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:51:04,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:51:04,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:51:04,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:51:04,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:51:04,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:51:04,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:51:04,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:51:04,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:51:04,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:51:04,829 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:51:04,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:51:04,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:51:04,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:51:04,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:51:04,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:51:04,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:51:04,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:51:04,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:51:04,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:51:04,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:51:04,832 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:51:04,833 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:51:05,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:51:05,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:51:05,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:51:05,058 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:51:05,059 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:51:05,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-02-14 20:51:05,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45afb7412/2aab53e2487c4f29b5f4e9ee15cdf20f/FLAGf4786d1c1 [2022-02-14 20:51:05,471 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:51:05,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-02-14 20:51:05,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45afb7412/2aab53e2487c4f29b5f4e9ee15cdf20f/FLAGf4786d1c1 [2022-02-14 20:51:05,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45afb7412/2aab53e2487c4f29b5f4e9ee15cdf20f [2022-02-14 20:51:05,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:51:05,887 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:51:05,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:51:05,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:51:05,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:51:05,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:51:05" (1/1) ... [2022-02-14 20:51:05,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51992fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:05, skipping insertion in model container [2022-02-14 20:51:05,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:51:05" (1/1) ... [2022-02-14 20:51:05,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:51:05,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:51:06,086 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/sendmail-close-angle.i[893,906] [2022-02-14 20:51:06,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:51:06,114 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:51:06,131 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/sendmail-close-angle.i[893,906] [2022-02-14 20:51:06,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:51:06,158 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:51:06,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06 WrapperNode [2022-02-14 20:51:06,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:51:06,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:51:06,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:51:06,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:51:06,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:51:06,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:51:06,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:51:06,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:51:06,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:51:06,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:06,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 20:51:06,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 20:51:06,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:51:06,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:51:06,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:51:06,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 20:51:06,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:51:06,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:51:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:51:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:51:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:51:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:51:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:51:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:51:06,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 20:51:06,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:51:06,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 20:51:06,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:51:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:51:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:51:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:51:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:51:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:51:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:51:06,331 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:51:06,332 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:51:06,429 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:51:06,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:51:06,434 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 20:51:06,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:06 BoogieIcfgContainer [2022-02-14 20:51:06,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:51:06,437 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:51:06,437 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:51:06,438 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:51:06,440 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:06" (1/1) ... [2022-02-14 20:51:06,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:51:06 BasicIcfg [2022-02-14 20:51:06,456 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:51:06,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:51:06,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:51:06,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:51:06,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:51:05" (1/4) ... [2022-02-14 20:51:06,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a86e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:51:06, skipping insertion in model container [2022-02-14 20:51:06,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:06" (2/4) ... [2022-02-14 20:51:06,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a86e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:51:06, skipping insertion in model container [2022-02-14 20:51:06,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:06" (3/4) ... [2022-02-14 20:51:06,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a86e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:51:06, skipping insertion in model container [2022-02-14 20:51:06,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:51:06" (4/4) ... [2022-02-14 20:51:06,463 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.iJordan [2022-02-14 20:51:06,467 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:51:06,467 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:51:06,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:51:06,527 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 20:51:06,528 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:51:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 20:51:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-14 20:51:06,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:06,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:06,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1933732557, now seen corresponding path program 1 times [2022-02-14 20:51:06,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:06,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945622338] [2022-02-14 20:51:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:06,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:06,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945622338] [2022-02-14 20:51:06,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945622338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:06,786 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:06,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 20:51:06,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390693185] [2022-02-14 20:51:06,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 20:51:06,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 20:51:06,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:51:06,825 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-02-14 20:51:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:06,918 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-02-14 20:51:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 20:51:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 15 [2022-02-14 20:51:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:06,928 INFO L225 Difference]: With dead ends: 36 [2022-02-14 20:51:06,928 INFO L226 Difference]: Without dead ends: 30 [2022-02-14 20:51:06,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:51:06,939 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:06,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-14 20:51:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-14 20:51:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 20:51:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-02-14 20:51:06,981 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-02-14 20:51:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:06,982 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-02-14 20:51:06,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-02-14 20:51:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-02-14 20:51:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-14 20:51:06,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:06,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:06,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:51:06,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash 213262551, now seen corresponding path program 1 times [2022-02-14 20:51:06,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:06,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464328193] [2022-02-14 20:51:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:06,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:07,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:07,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464328193] [2022-02-14 20:51:07,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464328193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:07,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:07,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 20:51:07,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053517692] [2022-02-14 20:51:07,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:07,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:51:07,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:51:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:51:07,087 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2022-02-14 20:51:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:07,278 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-02-14 20:51:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:51:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 16 [2022-02-14 20:51:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:07,280 INFO L225 Difference]: With dead ends: 34 [2022-02-14 20:51:07,280 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 20:51:07,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:51:07,282 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:07,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 20:51:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-14 20:51:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 20:51:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-14 20:51:07,290 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2022-02-14 20:51:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:07,290 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-14 20:51:07,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2022-02-14 20:51:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-14 20:51:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 20:51:07,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:07,292 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:51:07,292 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1077134525, now seen corresponding path program 1 times [2022-02-14 20:51:07,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:07,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847781293] [2022-02-14 20:51:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:07,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 20:51:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:07,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:07,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847781293] [2022-02-14 20:51:07,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847781293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:07,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:07,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 20:51:07,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923496246] [2022-02-14 20:51:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:07,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 20:51:07,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 20:51:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:51:07,400 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-02-14 20:51:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:07,568 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-02-14 20:51:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:51:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 21 [2022-02-14 20:51:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:07,573 INFO L225 Difference]: With dead ends: 47 [2022-02-14 20:51:07,573 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 20:51:07,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:51:07,581 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:07,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 20:51:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-02-14 20:51:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 20:51:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-02-14 20:51:07,595 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2022-02-14 20:51:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-02-14 20:51:07,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-02-14 20:51:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-02-14 20:51:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 20:51:07,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:07,596 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:07,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 20:51:07,597 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2113482804, now seen corresponding path program 1 times [2022-02-14 20:51:07,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:07,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822970479] [2022-02-14 20:51:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:51:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 20:51:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 20:51:07,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:07,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822970479] [2022-02-14 20:51:07,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822970479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:07,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:07,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 20:51:07,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595245233] [2022-02-14 20:51:07,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:07,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 20:51:07,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 20:51:07,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:51:07,694 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-02-14 20:51:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:07,888 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-02-14 20:51:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:51:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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 29 [2022-02-14 20:51:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:07,890 INFO L225 Difference]: With dead ends: 54 [2022-02-14 20:51:07,890 INFO L226 Difference]: Without dead ends: 54 [2022-02-14 20:51:07,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:51:07,892 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:07,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 66 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-14 20:51:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-02-14 20:51:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 20:51:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-02-14 20:51:07,899 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2022-02-14 20:51:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:07,900 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-02-14 20:51:07,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-02-14 20:51:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-02-14 20:51:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-14 20:51:07,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:07,901 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:07,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 20:51:07,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:07,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1308577884, now seen corresponding path program 1 times [2022-02-14 20:51:07,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:07,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355991084] [2022-02-14 20:51:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:07,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 20:51:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:07,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 20:51:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:51:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 20:51:08,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:08,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355991084] [2022-02-14 20:51:08,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355991084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:08,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:08,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 20:51:08,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470231177] [2022-02-14 20:51:08,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:08,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 20:51:08,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:08,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 20:51:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-14 20:51:08,011 INFO L87 Difference]: Start difference. First operand 49 states and 60 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 20:51:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:08,287 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2022-02-14 20:51:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 20:51:08,288 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-02-14 20:51:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:08,290 INFO L225 Difference]: With dead ends: 73 [2022-02-14 20:51:08,290 INFO L226 Difference]: Without dead ends: 68 [2022-02-14 20:51:08,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:51:08,295 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:08,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:51:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-14 20:51:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-02-14 20:51:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 20:51:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-02-14 20:51:08,307 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2022-02-14 20:51:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:08,308 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-02-14 20:51:08,308 INFO L471 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 20:51:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-02-14 20:51:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 20:51:08,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:08,309 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:08,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-14 20:51:08,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:08,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1447644068, now seen corresponding path program 1 times [2022-02-14 20:51:08,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:08,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954606704] [2022-02-14 20:51:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:08,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:51:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 20:51:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:51:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 20:51:08,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:08,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954606704] [2022-02-14 20:51:08,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954606704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:08,393 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:08,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 20:51:08,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403572724] [2022-02-14 20:51:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:08,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 20:51:08,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 20:51:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-14 20:51:08,395 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 20:51:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:08,605 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-02-14 20:51:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 20:51:08,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-02-14 20:51:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:08,607 INFO L225 Difference]: With dead ends: 75 [2022-02-14 20:51:08,607 INFO L226 Difference]: Without dead ends: 75 [2022-02-14 20:51:08,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:51:08,608 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:08,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 56 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:51:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-14 20:51:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-02-14 20:51:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 20:51:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-02-14 20:51:08,614 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2022-02-14 20:51:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:08,615 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-02-14 20:51:08,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 20:51:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-02-14 20:51:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 20:51:08,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:08,616 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:08,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-14 20:51:08,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1060067119, now seen corresponding path program 1 times [2022-02-14 20:51:08,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:08,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072036944] [2022-02-14 20:51:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:51:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 20:51:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:51:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 20:51:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 20:51:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 20:51:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 20:51:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 20:51:08,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:08,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072036944] [2022-02-14 20:51:08,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072036944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:08,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082252303] [2022-02-14 20:51:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:08,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:08,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:51:08,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:51:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 20:51:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 20:51:09,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:51:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 20:51:09,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082252303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:51:09,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:51:09,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-14 20:51:09,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608825431] [2022-02-14 20:51:09,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:51:09,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 20:51:09,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 20:51:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-14 20:51:09,447 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-14 20:51:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:10,095 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-02-14 20:51:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 20:51:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 57 [2022-02-14 20:51:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:10,102 INFO L225 Difference]: With dead ends: 113 [2022-02-14 20:51:10,102 INFO L226 Difference]: Without dead ends: 100 [2022-02-14 20:51:10,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-02-14 20:51:10,103 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 118 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:10,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 70 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 20:51:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-14 20:51:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-02-14 20:51:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 59 states have internal predecessors, (61), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 20:51:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-02-14 20:51:10,115 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 57 [2022-02-14 20:51:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:10,117 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-02-14 20:51:10,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-14 20:51:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-02-14 20:51:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-14 20:51:10,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:10,119 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:10,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 20:51:10,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:10,342 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1512463065, now seen corresponding path program 1 times [2022-02-14 20:51:10,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:10,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371987340] [2022-02-14 20:51:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:51:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 20:51:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:51:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 20:51:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 20:51:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:51:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 20:51:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 20:51:10,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:10,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371987340] [2022-02-14 20:51:10,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371987340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:10,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708109707] [2022-02-14 20:51:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:10,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:10,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:10,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:51:10,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:51:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:10,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 20:51:10,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 20:51:10,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:51:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 20:51:10,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708109707] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:51:10,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:51:10,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2022-02-14 20:51:10,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238872773] [2022-02-14 20:51:10,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:51:10,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 20:51:10,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:10,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 20:51:10,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:51:10,863 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-14 20:51:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:11,143 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-02-14 20:51:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 20:51:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 59 [2022-02-14 20:51:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:11,147 INFO L225 Difference]: With dead ends: 96 [2022-02-14 20:51:11,147 INFO L226 Difference]: Without dead ends: 96 [2022-02-14 20:51:11,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-02-14 20:51:11,149 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:11,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 71 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:51:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-14 20:51:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-14 20:51:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 62 states have internal predecessors, (64), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 20:51:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-02-14 20:51:11,166 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 59 [2022-02-14 20:51:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:11,167 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-02-14 20:51:11,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-14 20:51:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-02-14 20:51:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-14 20:51:11,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:11,168 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:11,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:51:11,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-02-14 20:51:11,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1765383868, now seen corresponding path program 2 times [2022-02-14 20:51:11,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:11,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432865568] [2022-02-14 20:51:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:51:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 20:51:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:51:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 20:51:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 20:51:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:51:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 20:51:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 20:51:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 20:51:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 20:51:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 20:51:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-02-14 20:51:11,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:11,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432865568] [2022-02-14 20:51:11,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432865568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:11,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046906376] [2022-02-14 20:51:11,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:51:11,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:11,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:51:11,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 20:51:11,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:51:11,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:51:11,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 20:51:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 20:51:12,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:51:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 20:51:12,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046906376] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:51:12,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:51:12,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-14 20:51:12,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977542719] [2022-02-14 20:51:12,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:51:12,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-14 20:51:12,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-14 20:51:12,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-14 20:51:12,299 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-02-14 20:51:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:13,193 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2022-02-14 20:51:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 20:51:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) Word has length 84 [2022-02-14 20:51:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:13,195 INFO L225 Difference]: With dead ends: 111 [2022-02-14 20:51:13,195 INFO L226 Difference]: Without dead ends: 111 [2022-02-14 20:51:13,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=479, Invalid=1971, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 20:51:13,197 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:13,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 92 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 20:51:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-14 20:51:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2022-02-14 20:51:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 65 states have internal predecessors, (67), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 20:51:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-02-14 20:51:13,205 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 84 [2022-02-14 20:51:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:13,205 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-02-14 20:51:13,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-02-14 20:51:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-02-14 20:51:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-14 20:51:13,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:13,207 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:13,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-14 20:51:13,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:13,428 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 446349519, now seen corresponding path program 2 times [2022-02-14 20:51:13,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:13,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501821298] [2022-02-14 20:51:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:51:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 20:51:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:51:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 20:51:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 20:51:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:51:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 20:51:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 20:51:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 20:51:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 20:51:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 20:51:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 20:51:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 20:51:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 20:51:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 20:51:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-02-14 20:51:13,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:13,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501821298] [2022-02-14 20:51:13,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501821298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:51:13,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361858931] [2022-02-14 20:51:13,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:51:13,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:13,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:13,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:51:13,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 20:51:13,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:51:13,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:51:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 20:51:13,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:51:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-02-14 20:51:13,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:51:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-02-14 20:51:14,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361858931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:51:14,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:51:14,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-02-14 20:51:14,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910699292] [2022-02-14 20:51:14,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:51:14,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 20:51:14,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 20:51:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-14 20:51:14,221 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-02-14 20:51:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:14,542 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2022-02-14 20:51:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 20:51:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-02-14 20:51:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:14,543 INFO L225 Difference]: With dead ends: 98 [2022-02-14 20:51:14,543 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 20:51:14,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 240 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-02-14 20:51:14,544 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:14,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:51:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 20:51:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 20:51:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 20:51:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 20:51:14,545 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2022-02-14 20:51:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:14,545 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 20:51:14,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-02-14 20:51:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 20:51:14,545 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 20:51:14,547 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 20:51:14,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 20:51:14,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:51:14,766 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:14,767 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 20:51:14,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:51:14 BasicIcfg [2022-02-14 20:51:14,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 20:51:14,770 INFO L158 Benchmark]: Toolchain (without parser) took 8882.79ms. Allocated memory was 186.6MB in the beginning and 275.8MB in the end (delta: 89.1MB). Free memory was 137.1MB in the beginning and 137.3MB in the end (delta: -230.8kB). Peak memory consumption was 89.5MB. Max. memory is 8.0GB. [2022-02-14 20:51:14,770 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 153.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:51:14,770 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.47ms. Allocated memory was 186.6MB in the beginning and 229.6MB in the end (delta: 43.0MB). Free memory was 136.9MB in the beginning and 206.0MB in the end (delta: -69.1MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2022-02-14 20:51:14,771 INFO L158 Benchmark]: Boogie Preprocessor took 45.76ms. Allocated memory is still 229.6MB. Free memory was 206.0MB in the beginning and 204.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 20:51:14,771 INFO L158 Benchmark]: RCFGBuilder took 230.11ms. Allocated memory is still 229.6MB. Free memory was 204.5MB in the beginning and 192.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 20:51:14,771 INFO L158 Benchmark]: IcfgTransformer took 19.15ms. Allocated memory is still 229.6MB. Free memory was 192.9MB in the beginning and 191.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 20:51:14,772 INFO L158 Benchmark]: TraceAbstraction took 8312.22ms. Allocated memory was 229.6MB in the beginning and 275.8MB in the end (delta: 46.1MB). Free memory was 191.3MB in the beginning and 137.3MB in the end (delta: 54.0MB). Peak memory consumption was 101.7MB. Max. memory is 8.0GB. [2022-02-14 20:51:14,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 153.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 270.47ms. Allocated memory was 186.6MB in the beginning and 229.6MB in the end (delta: 43.0MB). Free memory was 136.9MB in the beginning and 206.0MB in the end (delta: -69.1MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.76ms. Allocated memory is still 229.6MB. Free memory was 206.0MB in the beginning and 204.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 230.11ms. Allocated memory is still 229.6MB. Free memory was 204.5MB in the beginning and 192.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.15ms. Allocated memory is still 229.6MB. Free memory was 192.9MB in the beginning and 191.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 8312.22ms. Allocated memory was 229.6MB in the beginning and 275.8MB in the end (delta: 46.1MB). Free memory was 191.3MB in the beginning and 137.3MB in the end (delta: 54.0MB). Peak memory consumption was 101.7MB. 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, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 676 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 668 mSDsluCounter, 600 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 301 mSDsCounter, 927 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2556 IncrementalHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 927 mSolverCounterUnsat, 299 mSDtfsCounter, 2556 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 893 GetRequests, 699 SyntacticMatches, 14 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, InterpolantAutomatonStates: 114, 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, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 761 NumberOfCodeBlocks, 761 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1050 ConstructedInterpolants, 0 QuantifiedInterpolants, 3625 SizeOfPredicates, 16 NumberOfNonLiveVariables, 688 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2730/2923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 20:51:14,800 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...