/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/terminator_01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:12:42,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:12:42,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:12:42,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 09:12:42,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 09:12:42,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 09:12:42,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 09:12:42,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 09:12:42,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 09:12:42,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 09:12:42,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 09:12:42,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 09:12:42,531 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 09:12:42,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 09:12:42,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 09:12:42,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 09:12:42,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 09:12:42,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 09:12:42,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:12:42,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:12:42,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:12:42,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:12:42,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:12:42,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:12:42,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:12:42,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:12:42,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:12:42,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:12:42,575 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:12:42,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:12:42,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:12:42,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:12:42,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:12:42,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:12:42,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:12:42,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:12:42,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:12:42,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:12:42,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:12:42,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:12:42,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:12:42,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:12:42,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:12:42,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:12:42,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:12:42,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:12:42,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:12:42,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:12:42,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:12:42,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:12:42,580 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:12:42,580 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:12:42,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:12:42,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:12:42,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:12:42,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:12:42,853 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:12:42,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c [2022-04-06 09:12:42,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a077f19d/ab4b5b171527416bba2b7ea759b29fcc/FLAG8cfefa89e [2022-04-06 09:12:43,257 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:12:43,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c [2022-04-06 09:12:43,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a077f19d/ab4b5b171527416bba2b7ea759b29fcc/FLAG8cfefa89e [2022-04-06 09:12:43,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a077f19d/ab4b5b171527416bba2b7ea759b29fcc [2022-04-06 09:12:43,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:12:43,702 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:12:43,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:12:43,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:12:43,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:12:43,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acea181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43, skipping insertion in model container [2022-04-06 09:12:43,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:12:43,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:12:43,880 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/terminator_01.c[325,338] [2022-04-06 09:12:43,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:12:43,899 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:12:43,908 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/terminator_01.c[325,338] [2022-04-06 09:12:43,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:12:43,921 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:12:43,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43 WrapperNode [2022-04-06 09:12:43,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:12:43,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:12:43,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:12:43,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:12:43,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:12:43,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:12:43,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:12:43,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:12:43,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (1/1) ... [2022-04-06 09:12:43,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:12:43,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:12:43,988 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) [2022-04-06 09:12:43,994 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 [2022-04-06 09:12:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:12:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:12:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:12:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 09:12:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:12:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:12:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:12:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:12:44,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:12:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:12:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:12:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:12:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 09:12:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:12:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:12:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:12:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:12:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:12:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:12:44,085 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:12:44,086 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:12:44,166 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:12:44,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:12:44,171 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 09:12:44,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:12:44 BoogieIcfgContainer [2022-04-06 09:12:44,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:12:44,173 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:12:44,173 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:12:44,174 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:12:44,176 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:12:44" (1/1) ... [2022-04-06 09:12:44,177 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:12:44,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:12:44 BasicIcfg [2022-04-06 09:12:44,189 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:12:44,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:12:44,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:12:44,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:12:44,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:12:43" (1/4) ... [2022-04-06 09:12:44,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc12d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:12:44, skipping insertion in model container [2022-04-06 09:12:44,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:12:43" (2/4) ... [2022-04-06 09:12:44,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc12d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:12:44, skipping insertion in model container [2022-04-06 09:12:44,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:12:44" (3/4) ... [2022-04-06 09:12:44,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc12d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:12:44, skipping insertion in model container [2022-04-06 09:12:44,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:12:44" (4/4) ... [2022-04-06 09:12:44,196 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_01.cqvasr [2022-04-06 09:12:44,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:12:44,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:12:44,243 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:12:44,249 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 09:12:44,250 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:12:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-04-06 09:12:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 09:12:44,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:44,282 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:12:44,282 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash -487068095, now seen corresponding path program 1 times [2022-04-06 09:12:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:44,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324237596] [2022-04-06 09:12:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:44,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:12:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:12:44,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:12:44,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324237596] [2022-04-06 09:12:44,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324237596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:12:44,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:12:44,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 09:12:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921816523] [2022-04-06 09:12:44,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:12:44,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 09:12:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:12:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 09:12:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:12:44,560 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-04-06 09:12:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:12:44,632 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-06 09:12:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 09:12:44,641 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 [2022-04-06 09:12:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:12:44,646 INFO L225 Difference]: With dead ends: 32 [2022-04-06 09:12:44,646 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 09:12:44,649 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 [2022-04-06 09:12:44,651 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 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 [2022-04-06 09:12:44,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:12:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 09:12:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 09:12:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-04-06 09:12:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-06 09:12:44,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-04-06 09:12:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:12:44,684 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-06 09:12:44,684 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) [2022-04-06 09:12:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-06 09:12:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 09:12:44,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:44,685 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:12:44,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:12:44,685 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2110189820, now seen corresponding path program 1 times [2022-04-06 09:12:44,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346217426] [2022-04-06 09:12:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 09:12:44,711 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 09:12:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 09:12:44,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 09:12:44,753 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 09:12:44,754 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 09:12:44,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 09:12:44,766 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1] [2022-04-06 09:12:44,768 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 09:12:44,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:12:44 BasicIcfg [2022-04-06 09:12:44,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 09:12:44,789 INFO L158 Benchmark]: Toolchain (without parser) took 1086.29ms. Allocated memory is still 174.1MB. Free memory was 120.9MB in the beginning and 111.6MB in the end (delta: 9.2MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-04-06 09:12:44,789 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 174.1MB. Free memory is still 137.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 09:12:44,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.75ms. Allocated memory is still 174.1MB. Free memory was 120.6MB in the beginning and 150.1MB in the end (delta: -29.5MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-04-06 09:12:44,790 INFO L158 Benchmark]: Boogie Preprocessor took 26.86ms. Allocated memory is still 174.1MB. Free memory was 150.1MB in the beginning and 148.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 09:12:44,790 INFO L158 Benchmark]: RCFGBuilder took 220.91ms. Allocated memory is still 174.1MB. Free memory was 148.6MB in the beginning and 139.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 09:12:44,791 INFO L158 Benchmark]: IcfgTransformer took 15.88ms. Allocated memory is still 174.1MB. Free memory was 138.9MB in the beginning and 137.8MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 09:12:44,791 INFO L158 Benchmark]: TraceAbstraction took 597.96ms. Allocated memory is still 174.1MB. Free memory was 137.3MB in the beginning and 111.6MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2022-04-06 09:12:44,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 174.1MB. Free memory is still 137.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.75ms. Allocated memory is still 174.1MB. Free memory was 120.6MB in the beginning and 150.1MB in the end (delta: -29.5MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.86ms. Allocated memory is still 174.1MB. Free memory was 150.1MB in the beginning and 148.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 220.91ms. Allocated memory is still 174.1MB. Free memory was 148.6MB in the beginning and 139.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 15.88ms. Allocated memory is still 174.1MB. Free memory was 138.9MB in the beginning and 137.8MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 597.96ms. Allocated memory is still 174.1MB. Free memory was 137.3MB in the beginning and 111.6MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. 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=__VERIFIER_nondet_int(); [L15] int x=__VERIFIER_nondet_int(); [L16] int *p = &x; VAL [p={5:0}, x={5:0}] [L18] EXPR \read(x) VAL [\read(x)=100, p={5:0}, x={5:0}] [L18] COND FALSE !(x<100) [L21] CALL __VERIFIER_assert(0) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 19 mSDtfsCounter, 3 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=20occurred 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 09:12:44,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...