/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/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:46:35,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:46:35,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:46:35,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 12:46:35,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 12:46:35,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 12:46:35,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 12:46:35,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 12:46:35,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 12:46:35,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 12:46:35,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 12:46:35,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 12:46:35,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 12:46:35,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 12:46:35,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 12:46:35,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 12:46:35,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 12:46:35,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 12:46:35,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 12:46:35,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 12:46:35,874 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 12:46:35,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 12:46:35,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 12:46:35,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 12:46:35,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 12:46:35,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 12:46:35,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 12:46:35,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 12:46:35,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 12:46:35,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 12:46:35,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 12:46:35,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 12:46:35,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 12:46:35,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 12:46:35,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 12:46:35,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 12:46:35,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 12:46:35,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 12:46:35,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 12:46:35,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:46:35,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:46:35,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:46:35,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:46:35,903 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:46:35,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:46:35,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:46:35,906 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:46:35,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:46:35,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:46:35,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:46:35,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:46:35,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:46:35,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:46:35,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:46:35,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:46:35,908 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:46:35,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:46:35,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:46:35,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:46:35,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:46:35,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:46:35,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:35,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:46:35,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:46:35,909 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:46:35,909 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:46:35,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:46:35,910 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:46:35,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:46:36,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:46:36,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:46:36,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:46:36,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:46:36,125 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:46:36,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2022-03-20 12:46:36,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c381869/3d06727d8eea48e2abd96b3336184682/FLAG195360b2e [2022-03-20 12:46:36,560 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:46:36,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2022-03-20 12:46:36,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c381869/3d06727d8eea48e2abd96b3336184682/FLAG195360b2e [2022-03-20 12:46:36,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c381869/3d06727d8eea48e2abd96b3336184682 [2022-03-20 12:46:36,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:46:36,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:46:36,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:36,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:46:36,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:46:36,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:36" (1/1) ... [2022-03-20 12:46:36,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fab4c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:36, skipping insertion in model container [2022-03-20 12:46:36,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:36" (1/1) ... [2022-03-20 12:46:36,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:46:36,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:46:37,115 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/trex02-2.c[320,333] [2022-03-20 12:46:37,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:37,131 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:46:37,141 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/trex02-2.c[320,333] [2022-03-20 12:46:37,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:37,155 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:46:37,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37 WrapperNode [2022-03-20 12:46:37,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:37,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:46:37,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:46:37,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:46:37,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:46:37,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:46:37,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:46:37,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:46:37,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (1/1) ... [2022-03-20 12:46:37,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:37,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:37,209 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 12:46:37,223 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 12:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-20 12:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:46:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:46:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:46:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:46:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:46:37,301 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:46:37,307 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:46:37,383 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:46:37,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:46:37,389 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:46:37,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:37 BoogieIcfgContainer [2022-03-20 12:46:37,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:46:37,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:46:37,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:46:37,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:46:37,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:46:36" (1/3) ... [2022-03-20 12:46:37,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e21a348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:37, skipping insertion in model container [2022-03-20 12:46:37,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:37" (2/3) ... [2022-03-20 12:46:37,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e21a348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:37, skipping insertion in model container [2022-03-20 12:46:37,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:37" (3/3) ... [2022-03-20 12:46:37,398 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2022-03-20 12:46:37,402 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:46:37,403 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:46:37,439 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:46:37,448 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-03-20 12:46:37,448 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:46:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 12:46:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 12:46:37,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:37,478 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:37,478 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1589172536, now seen corresponding path program 1 times [2022-03-20 12:46:37,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:37,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122567919] [2022-03-20 12:46:37,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1589172536, now seen corresponding path program 2 times [2022-03-20 12:46:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734254758] [2022-03-20 12:46:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:37,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:37,737 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 12:46:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:37,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734254758] [2022-03-20 12:46:37,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734254758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:37,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:37,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:37,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122567919] [2022-03-20 12:46:37,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122567919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:37,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:37,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452687432] [2022-03-20 12:46:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:37,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:46:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:46:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:46:37,789 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) 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 12:46:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:37,881 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 12:46:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:46:37,883 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 12:46:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:37,889 INFO L225 Difference]: With dead ends: 35 [2022-03-20 12:46:37,890 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 12:46:37,892 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 12:46:37,895 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:37,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 12:46:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 12:46:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 12 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 12:46:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 12:46:37,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-03-20 12:46:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:37,927 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 12:46:37,927 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 12:46:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 12:46:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 12:46:37,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:37,928 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:37,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:46:37,928 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:37,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1578090284, now seen corresponding path program 1 times [2022-03-20 12:46:37,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:37,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2080504875] [2022-03-20 12:46:37,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1578090284, now seen corresponding path program 2 times [2022-03-20 12:46:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:37,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874853978] [2022-03-20 12:46:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 12:46:37,952 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 12:46:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 12:46:37,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 12:46:37,979 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 12:46:37,979 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 12:46:37,982 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 12:46:37,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:46:37,987 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2] [2022-03-20 12:46:37,990 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 12:46:38,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:46:38 BoogieIcfgContainer [2022-03-20 12:46:38,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 12:46:38,004 INFO L158 Benchmark]: Toolchain (without parser) took 1040.06ms. Allocated memory is still 176.2MB. Free memory was 127.0MB in the beginning and 112.4MB in the end (delta: 14.6MB). Peak memory consumption was 14.2MB. Max. memory is 8.0GB. [2022-03-20 12:46:38,006 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 176.2MB. Free memory was 143.5MB in the beginning and 143.4MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 12:46:38,008 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.10ms. Allocated memory is still 176.2MB. Free memory was 126.7MB in the beginning and 152.3MB in the end (delta: -25.5MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-03-20 12:46:38,008 INFO L158 Benchmark]: Boogie Preprocessor took 23.15ms. Allocated memory is still 176.2MB. Free memory was 152.3MB in the beginning and 151.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:46:38,009 INFO L158 Benchmark]: RCFGBuilder took 208.19ms. Allocated memory is still 176.2MB. Free memory was 150.7MB in the beginning and 140.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 12:46:38,009 INFO L158 Benchmark]: TraceAbstraction took 610.64ms. Allocated memory is still 176.2MB. Free memory was 140.2MB in the beginning and 112.4MB in the end (delta: 27.8MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2022-03-20 12:46:38,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 176.2MB. Free memory was 143.5MB in the beginning and 143.4MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.10ms. Allocated memory is still 176.2MB. Free memory was 126.7MB in the beginning and 152.3MB in the end (delta: -25.5MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.15ms. Allocated memory is still 176.2MB. Free memory was 152.3MB in the beginning and 151.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 208.19ms. Allocated memory is still 176.2MB. Free memory was 150.7MB in the beginning and 140.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 610.64ms. Allocated memory is still 176.2MB. Free memory was 140.2MB in the beginning and 112.4MB in the end (delta: 27.8MB). Peak memory consumption was 28.3MB. 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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x; [L22] x=__VERIFIER_nondet_int() [L23] COND FALSE !(x > 0) [L28] CALL __VERIFIER_assert(x==0) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 29 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 25 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 12:46:38,050 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...