/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:05:34,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:05:34,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:05:35,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 04:05:35,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:05:35,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:05:35,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:05:35,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:05:35,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:05:35,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:05:35,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:05:35,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:05:35,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:05:35,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:05:35,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:05:35,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:05:35,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 04:05:35,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:05:35,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:05:35,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:05:35,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:05:35,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:05:35,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:05:35,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:05:35,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:05:35,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:05:35,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:05:35,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:05:35,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:05:35,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:05:35,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:05:35,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:05:35,072 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:05:35,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:05:35,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:05:35,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:05:35,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:05:35,259 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:05:35,259 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:05:35,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-02-15 04:05:35,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6c98f40/61d85514c7ae4f68a43d6730ee6d8b5b/FLAGcadc72c44 [2022-02-15 04:05:35,684 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:05:35,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-02-15 04:05:35,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6c98f40/61d85514c7ae4f68a43d6730ee6d8b5b/FLAGcadc72c44 [2022-02-15 04:05:35,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6c98f40/61d85514c7ae4f68a43d6730ee6d8b5b [2022-02-15 04:05:35,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:05:35,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:05:35,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:05:35,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:05:35,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:05:35,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:35,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a678826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35, skipping insertion in model container [2022-02-15 04:05:35,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:35,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:05:35,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:05:35,914 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610] [2022-02-15 04:05:35,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:05:35,942 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:05:35,951 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610] [2022-02-15 04:05:35,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:05:35,978 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:05:35,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35 WrapperNode [2022-02-15 04:05:35,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:05:35,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:05:35,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:05:35,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:05:35,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:35,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:35,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:35,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:36,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:36,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:36,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:36,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:05:36,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:05:36,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:05:36,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:05:36,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (1/1) ... [2022-02-15 04:05:36,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:05:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:05:36,040 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) [2022-02-15 04:05:36,059 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 [2022-02-15 04:05:36,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:05:36,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:05:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:05:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 04:05:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 04:05:36,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:05:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:05:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:05:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:05:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:05:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:05:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 04:05:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 04:05:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:05:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:05:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:05:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:05:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:05:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:05:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:05:36,120 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:05:36,121 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:05:36,254 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:05:36,258 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:05:36,259 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:05:36,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:05:36 BoogieIcfgContainer [2022-02-15 04:05:36,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:05:36,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:05:36,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:05:36,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:05:36,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:05:35" (1/3) ... [2022-02-15 04:05:36,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bad0b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:05:36, skipping insertion in model container [2022-02-15 04:05:36,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:05:35" (2/3) ... [2022-02-15 04:05:36,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bad0b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:05:36, skipping insertion in model container [2022-02-15 04:05:36,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:05:36" (3/3) ... [2022-02-15 04:05:36,267 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.c [2022-02-15 04:05:36,270 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:05:36,271 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:05:36,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:05:36,305 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=QVASR [2022-02-15 04:05:36,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:05:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 04:05:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 04:05:36,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:36,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:36,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-02-15 04:05:36,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:36,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915547895] [2022-02-15 04:05:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:36,378 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:36,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:05:36,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:36,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915547895] [2022-02-15 04:05:36,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [915547895] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:36,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:36,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 04:05:36,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106880697] [2022-02-15 04:05:36,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:36,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 04:05:36,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 04:05:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 04:05:36,550 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-15 04:05:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:36,615 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-02-15 04:05:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 04:05:36,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-02-15 04:05:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:36,623 INFO L225 Difference]: With dead ends: 45 [2022-02-15 04:05:36,623 INFO L226 Difference]: Without dead ends: 21 [2022-02-15 04:05:36,625 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 [2022-02-15 04:05:36,628 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:36,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:05:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-15 04:05:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-02-15 04:05:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 04:05:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-15 04:05:36,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-02-15 04:05:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:36,661 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-15 04:05:36,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-15 04:05:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-15 04:05:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 04:05:36,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:36,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:36,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:05:36,664 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:36,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-02-15 04:05:36,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:36,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807277661] [2022-02-15 04:05:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:36,670 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:36,698 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-15 04:05:36,698 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-15 04:05:36,702 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:05:36,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:05:36,706 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-15 04:05:36,709 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 04:05:36,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 04:05:36 BoogieIcfgContainer [2022-02-15 04:05:36,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 04:05:36,721 INFO L158 Benchmark]: Toolchain (without parser) took 1005.61ms. Allocated memory was 189.8MB in the beginning and 313.5MB in the end (delta: 123.7MB). Free memory was 135.8MB in the beginning and 245.5MB in the end (delta: -109.7MB). Peak memory consumption was 15.4MB. Max. memory is 8.0GB. [2022-02-15 04:05:36,722 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 152.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 04:05:36,725 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.74ms. Allocated memory was 189.8MB in the beginning and 313.5MB in the end (delta: 123.7MB). Free memory was 135.6MB in the beginning and 285.3MB in the end (delta: -149.7MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-02-15 04:05:36,726 INFO L158 Benchmark]: Boogie Preprocessor took 33.09ms. Allocated memory is still 313.5MB. Free memory was 285.3MB in the beginning and 283.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 04:05:36,727 INFO L158 Benchmark]: RCFGBuilder took 246.48ms. Allocated memory is still 313.5MB. Free memory was 283.8MB in the beginning and 272.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 04:05:36,727 INFO L158 Benchmark]: TraceAbstraction took 459.49ms. Allocated memory is still 313.5MB. Free memory was 271.7MB in the beginning and 245.5MB in the end (delta: 26.2MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. [2022-02-15 04:05:36,728 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 152.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.74ms. Allocated memory was 189.8MB in the beginning and 313.5MB in the end (delta: 123.7MB). Free memory was 135.6MB in the beginning and 285.3MB in the end (delta: -149.7MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.09ms. Allocated memory is still 313.5MB. Free memory was 285.3MB in the beginning and 283.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 246.48ms. Allocated memory is still 313.5MB. Free memory was 283.8MB in the beginning and 272.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 459.49ms. Allocated memory is still 313.5MB. Free memory was 271.7MB in the beginning and 245.5MB in the end (delta: 26.2MB). Peak memory consumption was 26.2MB. 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 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 [L31] EXPR counter++ [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, 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, 6 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6 mSDsluCounter, 31 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15 IncrementalHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 27 mSDtfsCounter, 15 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=25occurred 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, 1 StatesRemovedByMinimization, 1 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 could not prove your program: unable to determine feasibility of some traces [2022-02-15 04:05:36,759 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...