/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:03:49,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:03:49,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:03:49,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:03:49,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:03:49,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:03:49,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:03:49,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:03:49,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:03:49,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:03:49,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:03:49,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:03:49,363 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:03:49,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:03:49,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:03:49,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:03:49,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:03:49,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:03:49,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:03:49,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:03:49,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:03:49,374 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 08:03:49,392 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:03:49,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:03:49,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:03:49,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:03:49,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:03:49,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:03:49,394 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:03:49,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:03:49,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:03:49,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:03:49,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:03:49,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:03:49,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:03:49,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:03:49,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:03:49,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:03:49,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:03:49,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:03:49,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:03:49,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:03:49,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:03:49,396 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:03:49,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:03:49,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:03:49,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:03:49,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:03:49,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:03:49,550 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:03:49,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2022-03-20 08:03:49,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efa4a0797/59e2a4f42ba144f69a3c9b8faf5a2be4/FLAG11a261512 [2022-03-20 08:03:49,934 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:03:49,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2022-03-20 08:03:49,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efa4a0797/59e2a4f42ba144f69a3c9b8faf5a2be4/FLAG11a261512 [2022-03-20 08:03:49,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efa4a0797/59e2a4f42ba144f69a3c9b8faf5a2be4 [2022-03-20 08:03:49,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:03:49,948 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:03:49,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:03:49,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:03:49,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:03:49,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:03:49" (1/1) ... [2022-03-20 08:03:49,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68afbe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:49, skipping insertion in model container [2022-03-20 08:03:49,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:03:49" (1/1) ... [2022-03-20 08:03:49,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:03:49,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:03:50,123 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821] [2022-03-20 08:03:50,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:03:50,148 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:03:50,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821] [2022-03-20 08:03:50,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:03:50,171 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:03:50,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50 WrapperNode [2022-03-20 08:03:50,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:03:50,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:03:50,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:03:50,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:03:50,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:03:50,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:03:50,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:03:50,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:03:50,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:03:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:50,215 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 08:03:50,236 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 08:03:50,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:03:50,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:03:50,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:03:50,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:03:50,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:03:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:03:50,292 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:03:50,293 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:03:50,364 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:03:50,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:03:50,378 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:03:50,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:50 BoogieIcfgContainer [2022-03-20 08:03:50,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:03:50,380 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:03:50,380 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:03:50,381 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:03:50,383 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:50" (1/1) ... [2022-03-20 08:03:50,384 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:03:50,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:03:50 BasicIcfg [2022-03-20 08:03:50,392 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:03:50,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:03:50,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:03:50,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:03:50,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:03:49" (1/4) ... [2022-03-20 08:03:50,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e3ecb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:03:50, skipping insertion in model container [2022-03-20 08:03:50,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:50" (2/4) ... [2022-03-20 08:03:50,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e3ecb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:03:50, skipping insertion in model container [2022-03-20 08:03:50,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:50" (3/4) ... [2022-03-20 08:03:50,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e3ecb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:03:50, skipping insertion in model container [2022-03-20 08:03:50,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:03:50" (4/4) ... [2022-03-20 08:03:50,397 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.iqvasr [2022-03-20 08:03:50,406 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:03:50,406 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:03:50,452 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:03:50,457 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 08:03:50,457 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:03:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:03:50,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:50,470 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:50,470 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -423489079, now seen corresponding path program 1 times [2022-03-20 08:03:50,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:50,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332518449] [2022-03-20 08:03:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:50,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:50,601 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 08:03:50,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:50,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332518449] [2022-03-20 08:03:50,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332518449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:50,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:03:50,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:03:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859775847] [2022-03-20 08:03:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:50,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:03:50,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:03:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:03:50,633 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 08:03:50,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:50,664 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-20 08:03:50,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:03:50,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-20 08:03:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:50,670 INFO L225 Difference]: With dead ends: 31 [2022-03-20 08:03:50,670 INFO L226 Difference]: Without dead ends: 14 [2022-03-20 08:03:50,671 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 08:03:50,674 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:50,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-20 08:03:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-20 08:03:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 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 08:03:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-20 08:03:50,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-20 08:03:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:50,697 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-20 08:03:50,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 08:03:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-20 08:03:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:03:50,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:50,699 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:50,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:03:50,700 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash -422565558, now seen corresponding path program 1 times [2022-03-20 08:03:50,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:50,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265375125] [2022-03-20 08:03:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:50,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:50,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:50,762 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 08:03:50,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265375125] [2022-03-20 08:03:50,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265375125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:50,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:03:50,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:03:50,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090622998] [2022-03-20 08:03:50,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:50,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:03:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:03:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:03:50,765 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 08:03:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:50,807 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-03-20 08:03:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:03:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-20 08:03:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:50,809 INFO L225 Difference]: With dead ends: 25 [2022-03-20 08:03:50,809 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 08:03:50,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:03:50,812 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:50,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 08:03:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-03-20 08:03:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 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 08:03:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-20 08:03:50,815 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-03-20 08:03:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:50,815 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-20 08:03:50,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 08:03:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-20 08:03:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 08:03:50,816 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:50,816 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:50,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:03:50,816 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1744981802, now seen corresponding path program 1 times [2022-03-20 08:03:50,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:50,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317861437] [2022-03-20 08:03:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:50,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:50,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317861437] [2022-03-20 08:03:50,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317861437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:50,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714059649] [2022-03-20 08:03:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:50,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:50,864 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 08:03:50,865 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 08:03:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:50,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 08:03:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:50,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:51,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714059649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:51,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:51,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 08:03:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337861453] [2022-03-20 08:03:51,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:51,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:03:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:51,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:03:51,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:03:51,023 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:51,104 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-03-20 08:03:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:03:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 08:03:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:51,106 INFO L225 Difference]: With dead ends: 32 [2022-03-20 08:03:51,106 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 08:03:51,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:03:51,109 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:51,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 08:03:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 08:03:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 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 08:03:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-20 08:03:51,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-03-20 08:03:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:51,129 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-20 08:03:51,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-20 08:03:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 08:03:51,131 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:51,131 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:51,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:51,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:51,366 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2062709365, now seen corresponding path program 1 times [2022-03-20 08:03:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448293953] [2022-03-20 08:03:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:51,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:51,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448293953] [2022-03-20 08:03:51,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448293953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:51,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545661997] [2022-03-20 08:03:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:51,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:51,444 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 08:03:51,446 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 08:03:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:03:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:51,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:51,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545661997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:51,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:51,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 08:03:51,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098967428] [2022-03-20 08:03:51,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:51,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 08:03:51,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:51,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 08:03:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:03:51,595 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:51,732 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-03-20 08:03:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:03:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 08:03:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:51,734 INFO L225 Difference]: With dead ends: 46 [2022-03-20 08:03:51,734 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 08:03:51,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-20 08:03:51,736 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:51,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 08:03:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 08:03:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 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 08:03:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-03-20 08:03:51,747 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 23 [2022-03-20 08:03:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:51,747 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-03-20 08:03:51,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-03-20 08:03:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 08:03:51,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:51,752 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:51,768 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 08:03:51,957 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,SelfDestructingSolverStorable3 [2022-03-20 08:03:51,958 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:51,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash 838331851, now seen corresponding path program 2 times [2022-03-20 08:03:51,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:51,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567241991] [2022-03-20 08:03:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:51,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 08:03:51,970 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 08:03:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 08:03:51,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 08:03:51,993 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 08:03:51,993 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:03:51,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 08:03:51,996 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-03-20 08:03:51,998 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:03:52,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:03:52 BasicIcfg [2022-03-20 08:03:52,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:03:52,023 INFO L158 Benchmark]: Toolchain (without parser) took 2074.51ms. Allocated memory was 211.8MB in the beginning and 270.5MB in the end (delta: 58.7MB). Free memory was 159.0MB in the beginning and 214.3MB in the end (delta: -55.2MB). Peak memory consumption was 3.2MB. Max. memory is 8.0GB. [2022-03-20 08:03:52,023 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 211.8MB. Free memory was 175.1MB in the beginning and 174.9MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:03:52,023 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.51ms. Allocated memory is still 211.8MB. Free memory was 158.7MB in the beginning and 188.1MB in the end (delta: -29.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 08:03:52,023 INFO L158 Benchmark]: Boogie Preprocessor took 17.89ms. Allocated memory is still 211.8MB. Free memory was 188.1MB in the beginning and 186.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:03:52,023 INFO L158 Benchmark]: RCFGBuilder took 185.86ms. Allocated memory is still 211.8MB. Free memory was 186.6MB in the beginning and 177.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 08:03:52,023 INFO L158 Benchmark]: IcfgTransformer took 12.57ms. Allocated memory is still 211.8MB. Free memory was 177.2MB in the beginning and 176.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:03:52,024 INFO L158 Benchmark]: TraceAbstraction took 1628.72ms. Allocated memory was 211.8MB in the beginning and 270.5MB in the end (delta: 58.7MB). Free memory was 175.5MB in the beginning and 214.3MB in the end (delta: -38.8MB). Peak memory consumption was 19.3MB. Max. memory is 8.0GB. [2022-03-20 08:03:52,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 211.8MB. Free memory was 175.1MB in the beginning and 174.9MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.51ms. Allocated memory is still 211.8MB. Free memory was 158.7MB in the beginning and 188.1MB in the end (delta: -29.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.89ms. Allocated memory is still 211.8MB. Free memory was 188.1MB in the beginning and 186.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 185.86ms. Allocated memory is still 211.8MB. Free memory was 186.6MB in the beginning and 177.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 12.57ms. Allocated memory is still 211.8MB. Free memory was 177.2MB in the beginning and 176.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1628.72ms. Allocated memory was 211.8MB in the beginning and 270.5MB in the end (delta: 58.7MB). Free memory was 175.5MB in the beginning and 214.3MB in the end (delta: -38.8MB). Peak memory consumption was 19.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 VAL [i=1, sn=0] [L24] COND TRUE i<=8 VAL [i=1, sn=0] [L25] COND TRUE i<4 [L26] sn = sn + (2) VAL [i=1, sn=2] [L24] i++ VAL [i=2, sn=2] [L24] COND TRUE i<=8 VAL [i=2, sn=2] [L25] COND TRUE i<4 [L26] sn = sn + (2) VAL [i=2, sn=4] [L24] i++ VAL [i=3, sn=4] [L24] COND TRUE i<=8 VAL [i=3, sn=4] [L25] COND TRUE i<4 [L26] sn = sn + (2) VAL [i=3, sn=6] [L24] i++ VAL [i=4, sn=6] [L24] COND TRUE i<=8 VAL [i=4, sn=6] [L25] COND FALSE !(i<4) VAL [i=4, sn=6] [L24] i++ VAL [i=5, sn=6] [L24] COND TRUE i<=8 VAL [i=5, sn=6] [L25] COND FALSE !(i<4) VAL [i=5, sn=6] [L24] i++ VAL [i=6, sn=6] [L24] COND TRUE i<=8 VAL [i=6, sn=6] [L25] COND FALSE !(i<4) VAL [i=6, sn=6] [L24] i++ VAL [i=7, sn=6] [L24] COND TRUE i<=8 VAL [i=7, sn=6] [L25] COND FALSE !(i<4) VAL [i=7, sn=6] [L24] i++ VAL [i=8, sn=6] [L24] COND TRUE i<=8 VAL [i=8, sn=6] [L25] COND FALSE !(i<4) VAL [i=8, sn=6] [L24] i++ VAL [i=9, sn=6] [L24] COND FALSE !(i<=8) VAL [i=9, sn=6] [L28] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 103 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 102 mSDsluCounter, 103 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 97 IncrementalHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 54 mSDtfsCounter, 97 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/69 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-20 08:03:52,053 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...