/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:23:50,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:23:50,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:23:50,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:23:50,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:23:50,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:23:50,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:23:50,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:23:50,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:23:50,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:23:50,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:23:50,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:23:50,112 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:23:50,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:23:50,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:23:50,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:23:50,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:23:50,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:23:50,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:23:50,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:23:50,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:23:50,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:23:50,148 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:23:50,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:23:50,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:23:50,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:23:50,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:23:50,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:23:50,151 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:23:50,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:23:50,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:23:50,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:23:50,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:23:50,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:23:50,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:23:50,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:23:50,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:23:50,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:23:50,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:23:50,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:23:50,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:23:50,154 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:23:50,154 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:23:50,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:23:50,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:23:50,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:23:50,355 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:23:50,355 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:23:50,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-03-20 08:23:50,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e215021/99793dbb278e498490b2149971ed0992/FLAGbe64e3378 [2022-03-20 08:23:50,833 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:23:50,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-03-20 08:23:50,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e215021/99793dbb278e498490b2149971ed0992/FLAGbe64e3378 [2022-03-20 08:23:50,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e215021/99793dbb278e498490b2149971ed0992 [2022-03-20 08:23:50,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:23:50,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:23:50,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:23:50,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:23:50,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:23:50,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:23:50" (1/1) ... [2022-03-20 08:23:50,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e51dee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:50, skipping insertion in model container [2022-03-20 08:23:50,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:23:50" (1/1) ... [2022-03-20 08:23:50,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:23:50,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:23:51,035 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] [2022-03-20 08:23:51,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:23:51,054 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:23:51,065 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] [2022-03-20 08:23:51,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:23:51,078 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:23:51,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51 WrapperNode [2022-03-20 08:23:51,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:23:51,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:23:51,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:23:51,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:23:51,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:23:51,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:23:51,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:23:51,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:23:51,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:23:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:23:51,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:23:51,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:23:51,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:23:51,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:23:51,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:23:51,189 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:23:51,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:23:51,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:23:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:23:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:23:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:23:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:23:51,268 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:23:51,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:23:51,385 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:23:51,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:23:51,389 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:23:51,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:23:51 BoogieIcfgContainer [2022-03-20 08:23:51,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:23:51,391 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:23:51,391 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:23:51,392 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:23:51,393 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:23:51" (1/1) ... [2022-03-20 08:23:51,395 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:23:51,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:23:51 BasicIcfg [2022-03-20 08:23:51,404 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:23:51,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:23:51,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:23:51,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:23:51,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:23:50" (1/4) ... [2022-03-20 08:23:51,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d71cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:23:51, skipping insertion in model container [2022-03-20 08:23:51,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:23:51" (2/4) ... [2022-03-20 08:23:51,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d71cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:23:51, skipping insertion in model container [2022-03-20 08:23:51,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:23:51" (3/4) ... [2022-03-20 08:23:51,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d71cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:23:51, skipping insertion in model container [2022-03-20 08:23:51,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:23:51" (4/4) ... [2022-03-20 08:23:51,409 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.iqvasr [2022-03-20 08:23:51,412 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:23:51,413 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:23:51,449 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:23:51,455 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:23:51,455 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:23:51,467 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) [2022-03-20 08:23:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:23:51,469 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:51,470 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:23:51,470 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1933732557, now seen corresponding path program 1 times [2022-03-20 08:23:51,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:51,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049084844] [2022-03-20 08:23:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:51,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:51,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:23:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:51,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049084844] [2022-03-20 08:23:51,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049084844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:23:51,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:23:51,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:23:51,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820541748] [2022-03-20 08:23:51,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:23:51,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:23:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:51,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:23:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:23:51,644 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) [2022-03-20 08:23:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:51,695 INFO L93 Difference]: Finished difference Result 62 states and 93 transitions. [2022-03-20 08:23:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:23:51,697 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 [2022-03-20 08:23:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:51,702 INFO L225 Difference]: With dead ends: 62 [2022-03-20 08:23:51,702 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:23:51,704 INFO L912 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 [2022-03-20 08:23:51,706 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:51,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:23:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:23:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 08:23:51,728 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) [2022-03-20 08:23:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-20 08:23:51,729 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-03-20 08:23:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:51,730 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-20 08:23:51,730 INFO L479 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) [2022-03-20 08:23:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-20 08:23:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:23:51,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:51,731 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:23:51,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:23:51,731 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash 213262551, now seen corresponding path program 1 times [2022-03-20 08:23:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351674108] [2022-03-20 08:23:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:23:51,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:51,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351674108] [2022-03-20 08:23:51,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351674108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:23:51,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:23:51,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:23:51,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859436645] [2022-03-20 08:23:51,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:23:51,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:23:51,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:23:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:23:51,797 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) [2022-03-20 08:23:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:51,938 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-03-20 08:23:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:23:51,939 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 [2022-03-20 08:23:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:51,940 INFO L225 Difference]: With dead ends: 36 [2022-03-20 08:23:51,940 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 08:23:51,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:23:51,947 INFO L913 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 [2022-03-20 08:23:51,949 INFO L914 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] [2022-03-20 08:23:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 08:23:51,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 08:23:51,956 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) [2022-03-20 08:23:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-20 08:23:51,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2022-03-20 08:23:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:51,958 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-20 08:23:51,958 INFO L479 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) [2022-03-20 08:23:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-20 08:23:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:23:51,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:51,959 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:23:51,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:23:51,959 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1077134525, now seen corresponding path program 1 times [2022-03-20 08:23:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:51,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235031064] [2022-03-20 08:23:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:51,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 08:23:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:23:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235031064] [2022-03-20 08:23:52,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235031064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:23:52,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:23:52,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 08:23:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479678860] [2022-03-20 08:23:52,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:23:52,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:23:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:23:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:23:52,093 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) [2022-03-20 08:23:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:52,321 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-03-20 08:23:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:23:52,321 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 [2022-03-20 08:23:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:52,322 INFO L225 Difference]: With dead ends: 49 [2022-03-20 08:23:52,322 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 08:23:52,322 INFO L912 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 [2022-03-20 08:23:52,323 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:52,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:23:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 08:23:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-03-20 08:23:52,330 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) [2022-03-20 08:23:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-03-20 08:23:52,341 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2022-03-20 08:23:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:52,341 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-03-20 08:23:52,341 INFO L479 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) [2022-03-20 08:23:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-03-20 08:23:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 08:23:52,342 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:52,342 INFO L499 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] [2022-03-20 08:23:52,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 08:23:52,343 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:52,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2113482804, now seen corresponding path program 1 times [2022-03-20 08:23:52,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:52,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996159234] [2022-03-20 08:23:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:52,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 08:23:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:23:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:23:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996159234] [2022-03-20 08:23:52,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996159234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:23:52,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:23:52,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 08:23:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50345988] [2022-03-20 08:23:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:23:52,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:23:52,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:23:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:23:52,408 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) [2022-03-20 08:23:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:52,579 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-03-20 08:23:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:23:52,579 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 [2022-03-20 08:23:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:52,581 INFO L225 Difference]: With dead ends: 56 [2022-03-20 08:23:52,581 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 08:23:52,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:23:52,590 INFO L913 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 [2022-03-20 08:23:52,592 INFO L914 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] [2022-03-20 08:23:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 08:23:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-03-20 08:23:52,601 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) [2022-03-20 08:23:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-03-20 08:23:52,602 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2022-03-20 08:23:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:52,602 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-03-20 08:23:52,602 INFO L479 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) [2022-03-20 08:23:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-03-20 08:23:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 08:23:52,603 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:52,603 INFO L499 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] [2022-03-20 08:23:52,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 08:23:52,603 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1308577884, now seen corresponding path program 1 times [2022-03-20 08:23:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931376453] [2022-03-20 08:23:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 08:23:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 08:23:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 08:23:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:23:52,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:52,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931376453] [2022-03-20 08:23:52,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931376453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:23:52,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:23:52,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:23:52,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085792945] [2022-03-20 08:23:52,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:23:52,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:23:52,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:52,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:23:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:23:52,669 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) [2022-03-20 08:23:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:52,836 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-03-20 08:23:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:23:52,837 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 [2022-03-20 08:23:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:52,840 INFO L225 Difference]: With dead ends: 75 [2022-03-20 08:23:52,840 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 08:23:52,840 INFO L912 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 [2022-03-20 08:23:52,841 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:52,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 45 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:23:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 08:23:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-03-20 08:23:52,869 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) [2022-03-20 08:23:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-03-20 08:23:52,870 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2022-03-20 08:23:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:52,870 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-03-20 08:23:52,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (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) [2022-03-20 08:23:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-03-20 08:23:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 08:23:52,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:52,871 INFO L499 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] [2022-03-20 08:23:52,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 08:23:52,871 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1447644068, now seen corresponding path program 1 times [2022-03-20 08:23:52,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:52,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008100644] [2022-03-20 08:23:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:52,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 08:23:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:23:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 08:23:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:23:52,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008100644] [2022-03-20 08:23:52,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008100644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:23:52,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:23:52,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 08:23:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157739088] [2022-03-20 08:23:52,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:23:52,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 08:23:52,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 08:23:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:23:52,994 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) [2022-03-20 08:23:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:53,162 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-03-20 08:23:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 08:23:53,162 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 [2022-03-20 08:23:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:53,164 INFO L225 Difference]: With dead ends: 77 [2022-03-20 08:23:53,164 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 08:23:53,164 INFO L912 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 [2022-03-20 08:23:53,165 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:53,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 61 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:23:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 08:23:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-03-20 08:23:53,179 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) [2022-03-20 08:23:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-03-20 08:23:53,179 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2022-03-20 08:23:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:53,180 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-03-20 08:23:53,180 INFO L479 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) [2022-03-20 08:23:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-03-20 08:23:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 08:23:53,181 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:53,181 INFO L499 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] [2022-03-20 08:23:53,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 08:23:53,181 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1060067119, now seen corresponding path program 1 times [2022-03-20 08:23:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:53,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145456546] [2022-03-20 08:23:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:53,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 08:23:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:23:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 08:23:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 08:23:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 08:23:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 08:23:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 08:23:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 08:23:53,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145456546] [2022-03-20 08:23:53,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145456546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:23:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699094771] [2022-03-20 08:23:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:53,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:53,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:23:53,299 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) [2022-03-20 08:23:53,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:23:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:53,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 08:23:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:23:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 08:23:53,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:23:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 08:23:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699094771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:23:53,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:23:53,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 08:23:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857751171] [2022-03-20 08:23:53,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:23:53,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 08:23:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 08:23:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-03-20 08:23:53,835 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) [2022-03-20 08:23:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:54,331 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2022-03-20 08:23:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 08:23:54,331 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 [2022-03-20 08:23:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:54,333 INFO L225 Difference]: With dead ends: 115 [2022-03-20 08:23:54,333 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 08:23:54,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-03-20 08:23:54,334 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:54,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 75 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:23:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 08:23:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-03-20 08:23:54,343 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) [2022-03-20 08:23:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-03-20 08:23:54,344 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 57 [2022-03-20 08:23:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:54,344 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-03-20 08:23:54,344 INFO L479 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) [2022-03-20 08:23:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-03-20 08:23:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 08:23:54,345 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:54,345 INFO L499 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] [2022-03-20 08:23:54,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 08:23:54,550 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:54,551 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1512463065, now seen corresponding path program 1 times [2022-03-20 08:23:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:54,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336907922] [2022-03-20 08:23:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 08:23:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:23:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 08:23:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 08:23:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:23:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 08:23:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 08:23:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 08:23:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336907922] [2022-03-20 08:23:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336907922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:23:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901729023] [2022-03-20 08:23:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:54,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:54,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:23:54,661 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) [2022-03-20 08:23:54,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:23:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:54,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:23:54,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:23:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 08:23:54,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:23:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 08:23:55,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901729023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:23:55,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:23:55,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2022-03-20 08:23:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265178125] [2022-03-20 08:23:55,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:23:55,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 08:23:55,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 08:23:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:23:55,038 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) [2022-03-20 08:23:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:55,274 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2022-03-20 08:23:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:23:55,274 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 [2022-03-20 08:23:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:55,276 INFO L225 Difference]: With dead ends: 98 [2022-03-20 08:23:55,276 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 08:23:55,277 INFO L912 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 [2022-03-20 08:23:55,277 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:55,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 76 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:23:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 08:23:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-20 08:23:55,298 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) [2022-03-20 08:23:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-03-20 08:23:55,299 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 59 [2022-03-20 08:23:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:55,300 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-03-20 08:23:55,300 INFO L479 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) [2022-03-20 08:23:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-03-20 08:23:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 08:23:55,301 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:55,301 INFO L499 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] [2022-03-20 08:23:55,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:23:55,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-20 08:23:55,504 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1765383868, now seen corresponding path program 2 times [2022-03-20 08:23:55,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:55,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854609024] [2022-03-20 08:23:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:55,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 08:23:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:23:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 08:23:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 08:23:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:23:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 08:23:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 08:23:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 08:23:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 08:23:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 08:23:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-20 08:23:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 08:23:55,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854609024] [2022-03-20 08:23:55,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854609024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:23:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044947449] [2022-03-20 08:23:55,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:23:55,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:23:55,699 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) [2022-03-20 08:23:55,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:23:55,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:23:55,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:23:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:23:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:23:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 08:23:56,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:23:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 08:23:56,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044947449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:23:56,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:23:56,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-03-20 08:23:56,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966869977] [2022-03-20 08:23:56,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:23:56,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 08:23:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 08:23:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-20 08:23:56,353 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) [2022-03-20 08:23:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:57,127 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2022-03-20 08:23:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 08:23:57,128 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 [2022-03-20 08:23:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:57,129 INFO L225 Difference]: With dead ends: 113 [2022-03-20 08:23:57,129 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 08:23:57,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=479, Invalid=1971, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 08:23:57,131 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:57,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 92 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 08:23:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 08:23:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2022-03-20 08:23:57,139 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) [2022-03-20 08:23:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-03-20 08:23:57,140 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 84 [2022-03-20 08:23:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:57,140 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-03-20 08:23:57,140 INFO L479 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) [2022-03-20 08:23:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-03-20 08:23:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 08:23:57,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:57,142 INFO L499 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] [2022-03-20 08:23:57,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:23:57,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:57,359 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:57,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash 446349519, now seen corresponding path program 2 times [2022-03-20 08:23:57,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:57,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541701876] [2022-03-20 08:23:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 08:23:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:23:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 08:23:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 08:23:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:23:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 08:23:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 08:23:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 08:23:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 08:23:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 08:23:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-20 08:23:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 08:23:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 08:23:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-20 08:23:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 08:23:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-03-20 08:23:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541701876] [2022-03-20 08:23:57,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541701876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:23:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576655459] [2022-03-20 08:23:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:23:57,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:23:57,540 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) [2022-03-20 08:23:57,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:23:57,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:23:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:23:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:23:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:23:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-20 08:23:57,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:23:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-20 08:23:58,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576655459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:23:58,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:23:58,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-03-20 08:23:58,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941352630] [2022-03-20 08:23:58,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:23:58,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 08:23:58,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 08:23:58,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-20 08:23:58,142 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) [2022-03-20 08:23:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:58,446 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2022-03-20 08:23:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:23:58,447 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 [2022-03-20 08:23:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:58,447 INFO L225 Difference]: With dead ends: 100 [2022-03-20 08:23:58,447 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:23:58,448 INFO L912 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 [2022-03-20 08:23:58,448 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:58,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 78 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:23:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:23:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:23:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 08:23:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:23:58,449 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2022-03-20 08:23:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:58,450 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:23:58,450 INFO L479 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) [2022-03-20 08:23:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:23:58,450 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:23:58,452 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:23:58,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:23:58,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:58,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:23:59,164 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 08:23:59,164 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:23:59,164 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:23:59,165 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 56) the Hoare annotation is: true [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L885 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 56) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 56) no Hoare annotation was computed. [2022-03-20 08:23:59,165 INFO L878 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse1 (< main_~bufferlen~0 main_~inlen~0)) (.cse0 (+ 2 main_~buflim~0))) (or (and (= .cse0 main_~bufferlen~0) (= main_~in~0 0) (<= 2 main_~bufferlen~0) (= main_~buf~0 0) .cse1) (and (<= (+ main_~bufferlen~0 main_~in~0 1) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= 0 main_~buf~0) (<= main_~bufferlen~0 .cse0) .cse1 (<= .cse0 main_~bufferlen~0)))) [2022-03-20 08:23:59,165 INFO L878 garLoopResultBuilder]: At program point L37-3(lines 37 48) the Hoare annotation is: (let ((.cse0 (<= (+ main_~buf~0 2) main_~bufferlen~0)) (.cse1 (<= 1 main_~in~0)) (.cse2 (<= 0 main_~buf~0))) (or (and (= main_~in~0 0) (<= 2 main_~bufferlen~0) (= main_~buf~0 0)) (and .cse0 .cse1 .cse2 (<= main_~buf~0 2) (<= 3 main_~inlen~0)) (let ((.cse3 (+ 2 main_~buflim~0))) (and (<= (+ main_~bufferlen~0 main_~in~0 1) (+ main_~buf~0 main_~inlen~0)) .cse0 .cse1 .cse2 (<= main_~bufferlen~0 .cse3) (< main_~bufferlen~0 main_~inlen~0) (<= .cse3 main_~bufferlen~0))))) [2022-03-20 08:23:59,166 INFO L882 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2022-03-20 08:23:59,166 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= (+ main_~buf~0 2) main_~bufferlen~0)) (.cse1 (<= 1 main_~in~0)) (.cse2 (<= 0 main_~buf~0))) (or (and (= main_~in~0 0) (<= 2 main_~bufferlen~0) (= main_~buf~0 0)) (and .cse0 .cse1 .cse2 (<= main_~buf~0 2) (<= 3 main_~inlen~0)) (let ((.cse3 (+ 2 main_~buflim~0))) (and (<= (+ main_~bufferlen~0 main_~in~0 1) (+ main_~buf~0 main_~inlen~0)) .cse0 .cse1 .cse2 (<= main_~bufferlen~0 .cse3) (< main_~bufferlen~0 main_~inlen~0) (<= .cse3 main_~bufferlen~0))))) [2022-03-20 08:23:59,166 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2022-03-20 08:23:59,166 INFO L882 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2022-03-20 08:23:59,166 INFO L878 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (+ 2 main_~buflim~0)) (.cse1 (< main_~bufferlen~0 main_~inlen~0))) (or (and (<= (+ main_~bufferlen~0 main_~in~0 1) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~buf~0 3) main_~bufferlen~0) (<= 1 main_~in~0) (<= 0 main_~buf~0) (<= main_~bufferlen~0 .cse0) .cse1 (<= .cse0 main_~bufferlen~0)) (and (= .cse0 main_~bufferlen~0) (= main_~in~0 0) (<= 3 main_~bufferlen~0) (= main_~buf~0 0) .cse1))) [2022-03-20 08:23:59,166 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ main_~buf~0 1) main_~bufferlen~0) (let ((.cse0 (<= 2 main_~bufferlen~0)) (.cse1 (<= 0 main_~buf~0))) (or (and .cse0 (<= 1 main_~in~0) .cse1) (and (= main_~in~0 0) .cse0 .cse1)))) [2022-03-20 08:23:59,166 INFO L878 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (+ 2 main_~buflim~0)) (.cse1 (< main_~bufferlen~0 main_~inlen~0))) (or (and (<= (+ main_~bufferlen~0 main_~in~0 1) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~buf~0 3) main_~bufferlen~0) (<= 1 main_~in~0) (<= 0 main_~buf~0) (<= main_~bufferlen~0 .cse0) .cse1 (<= .cse0 main_~bufferlen~0)) (and (= .cse0 main_~bufferlen~0) (= main_~in~0 0) (<= 3 main_~bufferlen~0) (= main_~buf~0 0) .cse1))) [2022-03-20 08:23:59,166 INFO L878 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ main_~buf~0 1) main_~bufferlen~0) (let ((.cse0 (<= 2 main_~bufferlen~0)) (.cse1 (<= 0 main_~buf~0))) (or (and .cse0 (<= 1 main_~in~0) .cse1) (and (= main_~in~0 0) .cse0 .cse1)))) [2022-03-20 08:23:59,166 INFO L882 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-03-20 08:23:59,166 INFO L882 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-03-20 08:23:59,166 INFO L878 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (let ((.cse0 (+ 2 main_~buflim~0))) (and (<= (+ main_~bufferlen~0 main_~in~0 1) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= 0 main_~buf~0) (<= main_~bufferlen~0 .cse0) (< main_~bufferlen~0 main_~inlen~0) (<= .cse0 main_~bufferlen~0))) [2022-03-20 08:23:59,167 INFO L882 garLoopResultBuilder]: For program point L44(lines 44 45) no Hoare annotation was computed. [2022-03-20 08:23:59,167 INFO L878 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (+ 2 main_~buflim~0))) (and (<= (+ main_~bufferlen~0 main_~in~0 1) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= 0 main_~buf~0) (<= main_~bufferlen~0 .cse0) (< main_~bufferlen~0 main_~inlen~0) (<= .cse0 main_~bufferlen~0))) [2022-03-20 08:23:59,167 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 08:23:59,167 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-03-20 08:23:59,167 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-03-20 08:23:59,167 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:23:59,167 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-03-20 08:23:59,167 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:23:59,169 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-03-20 08:23:59,170 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:23:59,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:23:59 BasicIcfg [2022-03-20 08:23:59,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:23:59,180 INFO L158 Benchmark]: Toolchain (without parser) took 8325.63ms. Allocated memory was 242.2MB in the beginning and 291.5MB in the end (delta: 49.3MB). Free memory was 217.4MB in the beginning and 231.5MB in the end (delta: -14.1MB). Peak memory consumption was 171.1MB. Max. memory is 8.0GB. [2022-03-20 08:23:59,180 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 242.2MB. Free memory is still 203.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:23:59,180 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.00ms. Allocated memory is still 242.2MB. Free memory was 217.2MB in the beginning and 215.2MB in the end (delta: 2.0MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. [2022-03-20 08:23:59,180 INFO L158 Benchmark]: Boogie Preprocessor took 17.02ms. Allocated memory is still 242.2MB. Free memory was 215.2MB in the beginning and 213.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:23:59,181 INFO L158 Benchmark]: RCFGBuilder took 294.11ms. Allocated memory is still 242.2MB. Free memory was 213.8MB in the beginning and 202.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 08:23:59,181 INFO L158 Benchmark]: IcfgTransformer took 13.62ms. Allocated memory is still 242.2MB. Free memory was 202.9MB in the beginning and 201.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:23:59,181 INFO L158 Benchmark]: TraceAbstraction took 7774.18ms. Allocated memory was 242.2MB in the beginning and 291.5MB in the end (delta: 49.3MB). Free memory was 201.1MB in the beginning and 231.5MB in the end (delta: -30.4MB). Peak memory consumption was 156.0MB. Max. memory is 8.0GB. [2022-03-20 08:23:59,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 242.2MB. Free memory is still 203.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.00ms. Allocated memory is still 242.2MB. Free memory was 217.2MB in the beginning and 215.2MB in the end (delta: 2.0MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.02ms. Allocated memory is still 242.2MB. Free memory was 215.2MB in the beginning and 213.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 294.11ms. Allocated memory is still 242.2MB. Free memory was 213.8MB in the beginning and 202.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.62ms. Allocated memory is still 242.2MB. Free memory was 202.9MB in the beginning and 201.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 7774.18ms. Allocated memory was 242.2MB in the beginning and 291.5MB in the end (delta: 49.3MB). Free memory was 201.1MB in the beginning and 231.5MB in the end (delta: -30.4MB). Peak memory consumption was 156.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.7s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 649 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 641 mSDsluCounter, 625 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 326 mSDsCounter, 861 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2875 IncrementalHoareTripleChecker+Invalid, 3736 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 861 mSolverCounterUnsat, 299 mSDtfsCounter, 2875 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 893 GetRequests, 699 SyntacticMatches, 14 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.6s 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: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 60 PreInvPairs, 104 NumberOfFragments, 412 HoareAnnotationTreeSize, 60 FomulaSimplifications, 382 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 2197 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s 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 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((2 + buflim == bufferlen && in == 0) && 2 <= bufferlen) && buf == 0) && bufferlen < inlen) || ((((((bufferlen + in + 1 <= buf + inlen && buf + 2 <= bufferlen) && 1 <= in) && 0 <= buf) && bufferlen <= 2 + buflim) && bufferlen < inlen) && 2 + buflim <= bufferlen) RESULT: Ultimate proved your program to be correct! [2022-03-20 08:23:59,218 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...