/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:11:03,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:11:03,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:11:03,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 21:11:03,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 21:11:03,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 21:11:03,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 21:11:03,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 21:11:03,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 21:11:03,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 21:11:03,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 21:11:03,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 21:11:03,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:11:03,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:11:03,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:11:03,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:11:03,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:11:03,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:11:03,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:11:03,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:11:03,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:11:03,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:11:03,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:11:03,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:11:03,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 21:11:03,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 21:11:03,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 21:11:03,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 21:11:03,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 21:11:03,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 21:11:03,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 21:11:03,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 21:11:03,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 21:11:03,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 21:11:03,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 21:11:03,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 21:11:03,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 21:11:03,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 21:11:03,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:11:03,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:11:03,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:11:03,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:11:03,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:11:03,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:11:03,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:11:03,241 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:11:03,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:11:03,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:11:03,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:11:03,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:11:03,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:11:03,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:11:03,242 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:11:03,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:11:03,242 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:11:03,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:11:03,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:11:03,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:11:03,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:11:03,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:11:03,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:11:03,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:11:03,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:11:03,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:11:03,244 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:11:03,244 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:11:03,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:11:03,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:11:03,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:11:03,460 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:11:03,461 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:11:03,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-01-31 21:11:03,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed3c5d05/70b788e8557a424c891d29745fe156f3/FLAGfa7fa1b9b [2022-01-31 21:11:03,844 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:11:03,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-01-31 21:11:03,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed3c5d05/70b788e8557a424c891d29745fe156f3/FLAGfa7fa1b9b [2022-01-31 21:11:04,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed3c5d05/70b788e8557a424c891d29745fe156f3 [2022-01-31 21:11:04,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:11:04,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:11:04,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:11:04,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:11:04,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:11:04,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4165e9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04, skipping insertion in model container [2022-01-31 21:11:04,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:11:04,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:11:04,392 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-crafted-1/Mono6_1.c[311,324] [2022-01-31 21:11:04,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:11:04,422 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:11:04,432 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-crafted-1/Mono6_1.c[311,324] [2022-01-31 21:11:04,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:11:04,443 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:11:04,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04 WrapperNode [2022-01-31 21:11:04,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:11:04,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:11:04,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:11:04,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:11:04,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:11:04,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:11:04,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:11:04,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:11:04,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (1/1) ... [2022-01-31 21:11:04,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:11:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:11:04,493 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) [2022-01-31 21:11:04,507 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 [2022-01-31 21:11:04,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:11:04,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:11:04,534 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:11:04,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:11:04,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:11:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:11:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:11:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:11:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:11:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:11:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:11:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:11:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:11:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:11:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:11:04,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:11:04,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:11:04,584 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:11:04,585 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:11:04,657 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:11:04,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:11:04,662 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 21:11:04,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:11:04 BoogieIcfgContainer [2022-01-31 21:11:04,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:11:04,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:11:04,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:11:04,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:11:04,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:11:04" (1/3) ... [2022-01-31 21:11:04,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7a2da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:11:04, skipping insertion in model container [2022-01-31 21:11:04,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:11:04" (2/3) ... [2022-01-31 21:11:04,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7a2da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:11:04, skipping insertion in model container [2022-01-31 21:11:04,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:11:04" (3/3) ... [2022-01-31 21:11:04,672 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2022-01-31 21:11:04,676 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:11:04,676 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:11:04,717 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:11:04,723 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 21:11:04,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:11:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-01-31 21:11:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:11:04,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:04,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:04,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:04,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2022-01-31 21:11:04,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882819255] [2022-01-31 21:11:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:04,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:04,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:11:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:04,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:04,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882819255] [2022-01-31 21:11:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882819255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:04,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:04,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 21:11:04,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394121460] [2022-01-31 21:11:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:04,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 21:11:04,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 21:11:04,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:11:04,942 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-01-31 21:11:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:05,004 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-31 21:11:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 21:11:05,007 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 [2022-01-31 21:11:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:05,011 INFO L225 Difference]: With dead ends: 33 [2022-01-31 21:11:05,011 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 21:11:05,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:11:05,017 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 [2022-01-31 21:11:05,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:11:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 21:11:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 21:11:05,043 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) [2022-01-31 21:11:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-01-31 21:11:05,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-01-31 21:11:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:05,045 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-01-31 21:11:05,045 INFO L471 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) [2022-01-31 21:11:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-01-31 21:11:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:11:05,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:05,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:05,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:11:05,047 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2022-01-31 21:11:05,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:05,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078378909] [2022-01-31 21:11:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:05,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:05,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:11:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:05,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078378909] [2022-01-31 21:11:05,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078378909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:05,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:05,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 21:11:05,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485880013] [2022-01-31 21:11:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:05,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 21:11:05,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 21:11:05,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 21:11:05,197 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) [2022-01-31 21:11:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:05,246 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-01-31 21:11:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 21:11:05,246 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 [2022-01-31 21:11:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:05,247 INFO L225 Difference]: With dead ends: 25 [2022-01-31 21:11:05,247 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 21:11:05,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:11:05,249 INFO L933 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 [2022-01-31 21:11:05,249 INFO L934 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] [2022-01-31 21:11:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 21:11:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-01-31 21:11:05,256 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) [2022-01-31 21:11:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-31 21:11:05,256 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-01-31 21:11:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:05,257 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-31 21:11:05,257 INFO L471 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) [2022-01-31 21:11:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-31 21:11:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:11:05,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:05,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:05,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:11:05,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 1 times [2022-01-31 21:11:05,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:05,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554291791] [2022-01-31 21:11:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:05,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:05,487 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:11:05,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:05,998 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:05,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554291791] [2022-01-31 21:11:05,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554291791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:06,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:06,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:11:06,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456430347] [2022-01-31 21:11:06,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:06,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:11:06,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:11:06,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:11:06,002 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:06,169 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 21:11:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:11:06,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:11:06,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:06,170 INFO L225 Difference]: With dead ends: 26 [2022-01-31 21:11:06,170 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 21:11:06,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:11:06,172 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:06,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:11:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 21:11:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-01-31 21:11:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-01-31 21:11:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-31 21:11:06,185 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-01-31 21:11:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:06,185 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-31 21:11:06,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-31 21:11:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:11:06,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:06,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:06,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:11:06,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 1 times [2022-01-31 21:11:06,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:06,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420344311] [2022-01-31 21:11:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:06,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:06,495 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:11:06,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:06,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:06,758 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:06,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 21:11:06,787 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 21:11:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 21:11:06,822 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 21:11:06,822 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 21:11:06,824 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 21:11:06,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:11:06,828 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-31 21:11:06,831 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 21:11:06,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:11:06 BoogieIcfgContainer [2022-01-31 21:11:06,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 21:11:06,840 INFO L158 Benchmark]: Toolchain (without parser) took 2570.62ms. Allocated memory was 201.3MB in the beginning and 289.4MB in the end (delta: 88.1MB). Free memory was 146.9MB in the beginning and 246.9MB in the end (delta: -100.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 21:11:06,840 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 21:11:06,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.76ms. Allocated memory is still 201.3MB. Free memory was 146.6MB in the beginning and 173.0MB in the end (delta: -26.4MB). Peak memory consumption was 12.4MB. Max. memory is 8.0GB. [2022-01-31 21:11:06,841 INFO L158 Benchmark]: Boogie Preprocessor took 21.70ms. Allocated memory is still 201.3MB. Free memory was 173.0MB in the beginning and 171.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 21:11:06,842 INFO L158 Benchmark]: RCFGBuilder took 197.03ms. Allocated memory is still 201.3MB. Free memory was 171.9MB in the beginning and 162.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 21:11:06,842 INFO L158 Benchmark]: TraceAbstraction took 2174.86ms. Allocated memory was 201.3MB in the beginning and 289.4MB in the end (delta: 88.1MB). Free memory was 161.5MB in the beginning and 246.9MB in the end (delta: -85.5MB). Peak memory consumption was 3.7MB. Max. memory is 8.0GB. [2022-01-31 21:11:06,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.76ms. Allocated memory is still 201.3MB. Free memory was 146.6MB in the beginning and 173.0MB in the end (delta: -26.4MB). Peak memory consumption was 12.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.70ms. Allocated memory is still 201.3MB. Free memory was 173.0MB in the beginning and 171.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 197.03ms. Allocated memory is still 201.3MB. Free memory was 171.9MB in the beginning and 162.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 2174.86ms. Allocated memory was 201.3MB in the beginning and 289.4MB in the end (delta: 88.1MB). Free memory was 161.5MB in the beginning and 246.9MB in the end (delta: -85.5MB). Peak memory consumption was 3.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 4]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L7] unsigned int x = 0; [L8] unsigned int y = 10000000; [L9] unsigned int z=5000000; [L10] COND TRUE x=5000000) [L13] x++ [L10] COND TRUE x=5000000 [L12] z++ [L13] x++ [L10] COND FALSE !(x