/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/nla-digbench/freire2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:48:33,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:48:33,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:48:33,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:48:33,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:48:33,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:48:33,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:48:33,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:48:33,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:48:33,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:48:33,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:48:33,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:48:33,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:48:33,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:48:33,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:48:33,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:48:33,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:48:33,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:48:33,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:48:33,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:48:33,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:48:33,267 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:48:33,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:48:33,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:48:33,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:48:33,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:48:33,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:48:33,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:48:33,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:48:33,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:48:33,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:48:33,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:48:33,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:48:33,270 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:48:33,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:48:33,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:48:33,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:48:33,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:48:33,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:48:33,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:48:33,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:48:33,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:48:33,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:48:33,271 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:48:33,271 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:48:33,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:48:33,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:48:33,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:48:33,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:48:33,418 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:48:33,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/freire2.c [2022-01-31 21:48:33,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96e7f964/7b7627b76deb47068da12c0c7530ddbf/FLAGb55c3d524 [2022-01-31 21:48:33,897 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:48:33,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire2.c [2022-01-31 21:48:33,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96e7f964/7b7627b76deb47068da12c0c7530ddbf/FLAGb55c3d524 [2022-01-31 21:48:33,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96e7f964/7b7627b76deb47068da12c0c7530ddbf [2022-01-31 21:48:33,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:48:33,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:48:33,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:48:33,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:48:33,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:48:33,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:48:33" (1/1) ... [2022-01-31 21:48:33,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a9b9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:33, skipping insertion in model container [2022-01-31 21:48:33,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:48:33" (1/1) ... [2022-01-31 21:48:33,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:48:33,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:48:34,122 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/freire2.c[709,722] [2022-01-31 21:48:34,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:48:34,163 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:48:34,171 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/freire2.c[709,722] [2022-01-31 21:48:34,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:48:34,202 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:48:34,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34 WrapperNode [2022-01-31 21:48:34,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:48:34,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:48:34,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:48:34,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:48:34,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:48:34,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:48:34,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:48:34,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:48:34,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (1/1) ... [2022-01-31 21:48:34,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:48:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:48:34,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 21:48:34,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 21:48:34,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:48:34,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:48:34,305 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:48:34,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 21:48:34,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:48:34,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:48:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:48:34,350 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:48:34,351 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:48:34,454 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:48:34,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:48:34,458 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 21:48:34,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:48:34 BoogieIcfgContainer [2022-01-31 21:48:34,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:48:34,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:48:34,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:48:34,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:48:34,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:48:33" (1/3) ... [2022-01-31 21:48:34,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5149c771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:48:34, skipping insertion in model container [2022-01-31 21:48:34,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:34" (2/3) ... [2022-01-31 21:48:34,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5149c771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:48:34, skipping insertion in model container [2022-01-31 21:48:34,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:48:34" (3/3) ... [2022-01-31 21:48:34,465 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2022-01-31 21:48:34,468 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:48:34,468 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:48:34,497 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:48:34,502 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 21:48:34,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:48:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 21:48:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:48:34,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:34,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:34,515 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 515438393, now seen corresponding path program 1 times [2022-01-31 21:48:34,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:34,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348939132] [2022-01-31 21:48:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:34,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:34,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:48:34,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:34,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348939132] [2022-01-31 21:48:34,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348939132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:34,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:34,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 21:48:34,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541484148] [2022-01-31 21:48:34,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:34,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 21:48:34,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 21:48:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:48:34,645 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:34,715 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2022-01-31 21:48:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 21:48:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 21:48:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:34,721 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:48:34,722 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 21:48:34,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:48:34,726 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:34,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 21:48:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 21:48:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 21:48:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-01-31 21:48:34,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-01-31 21:48:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:34,750 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-01-31 21:48:34,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-01-31 21:48:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:48:34,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:34,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:34,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:48:34,751 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash 517106689, now seen corresponding path program 1 times [2022-01-31 21:48:34,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:34,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096802807] [2022-01-31 21:48:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:34,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:34,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:34,761 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 21:48:34,762 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 21:48:34,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 21:48:34,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:48:34,769 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 21:48:34,770 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 21:48:34,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:48:34 BoogieIcfgContainer [2022-01-31 21:48:34,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 21:48:34,777 INFO L158 Benchmark]: Toolchain (without parser) took 842.55ms. Allocated memory is still 255.9MB. Free memory was 203.7MB in the beginning and 191.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. [2022-01-31 21:48:34,777 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 220.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 21:48:34,778 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.40ms. Allocated memory is still 255.9MB. Free memory was 203.6MB in the beginning and 229.2MB in the end (delta: -25.7MB). Peak memory consumption was 6.1MB. Max. memory is 8.0GB. [2022-01-31 21:48:34,778 INFO L158 Benchmark]: Boogie Preprocessor took 36.50ms. Allocated memory is still 255.9MB. Free memory was 229.2MB in the beginning and 227.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 21:48:34,778 INFO L158 Benchmark]: RCFGBuilder took 218.90ms. Allocated memory is still 255.9MB. Free memory was 227.6MB in the beginning and 217.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 21:48:34,779 INFO L158 Benchmark]: TraceAbstraction took 316.41ms. Allocated memory is still 255.9MB. Free memory was 216.7MB in the beginning and 191.5MB in the end (delta: 25.3MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2022-01-31 21:48:34,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 220.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 266.40ms. Allocated memory is still 255.9MB. Free memory was 203.6MB in the beginning and 229.2MB in the end (delta: -25.7MB). Peak memory consumption was 6.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.50ms. Allocated memory is still 255.9MB. Free memory was 229.2MB in the beginning and 227.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 218.90ms. Allocated memory is still 255.9MB. Free memory was 227.6MB in the beginning and 217.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 316.41ms. Allocated memory is still 255.9MB. Free memory was 216.7MB in the beginning and 191.5MB in the end (delta: 25.3MB). 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 - UnprovableResult [Line: 19]: 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, overapproximation of to_int at line 33. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 [L32] COND TRUE 1 [L33] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, 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, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 24 mSDtfsCounter, 8 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, 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 could not prove your program: unable to determine feasibility of some traces [2022-01-31 21:48:34,805 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...