/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/dijkstra-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:48:02,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:48:02,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:48:02,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:48:02,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:48:02,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:48:02,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:48:02,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:48:02,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:48:02,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:48:02,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:48:02,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:48:02,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:48:02,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:48:02,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:48:02,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:48:02,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:48:02,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:48:02,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:48:02,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:48:02,299 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 21:48:02,311 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:48:02,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:48:02,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:48:02,313 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:48:02,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:48:02,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:48:02,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:48:02,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:48:02,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:48:02,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:48:02,314 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:48:02,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:48:02,314 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:48:02,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:48:02,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:48:02,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:48:02,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:48:02,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:48:02,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:48:02,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:48:02,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:48:02,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:48:02,315 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:48:02,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:48:02,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:48:02,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:48:02,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:48:02,515 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:48:02,531 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:48:02,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/dijkstra-u.c [2022-01-31 21:48:02,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d422bd2e3/96ae7316fe224dacb52e0ab21cf785ca/FLAG740e8f5aa [2022-01-31 21:48:02,873 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:48:02,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/dijkstra-u.c [2022-01-31 21:48:02,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d422bd2e3/96ae7316fe224dacb52e0ab21cf785ca/FLAG740e8f5aa [2022-01-31 21:48:03,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d422bd2e3/96ae7316fe224dacb52e0ab21cf785ca [2022-01-31 21:48:03,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:48:03,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:48:03,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:48:03,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:48:03,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:48:03,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3d341d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03, skipping insertion in model container [2022-01-31 21:48:03,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:48:03,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:48:03,490 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/dijkstra-u.c[525,538] [2022-01-31 21:48:03,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:48:03,512 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:48:03,519 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/dijkstra-u.c[525,538] [2022-01-31 21:48:03,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:48:03,537 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:48:03,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03 WrapperNode [2022-01-31 21:48:03,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:48:03,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:48:03,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:48:03,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:48:03,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:48:03,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:48:03,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:48:03,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:48:03,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (1/1) ... [2022-01-31 21:48:03,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:48:03,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:48:03,593 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 21:48:03,603 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 21:48:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:48:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:48:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:48:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 21:48:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:48:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:48:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:48:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:48:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:48:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:48:03,661 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:48:03,662 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:48:03,804 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:48:03,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:48:03,808 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 21:48:03,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:48:03 BoogieIcfgContainer [2022-01-31 21:48:03,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:48:03,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:48:03,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:48:03,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:48:03,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:48:03" (1/3) ... [2022-01-31 21:48:03,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3873127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:48:03, skipping insertion in model container [2022-01-31 21:48:03,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:48:03" (2/3) ... [2022-01-31 21:48:03,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3873127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:48:03, skipping insertion in model container [2022-01-31 21:48:03,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:48:03" (3/3) ... [2022-01-31 21:48:03,816 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u.c [2022-01-31 21:48:03,819 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:48:03,819 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:48:03,860 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:48:03,864 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 21:48:03,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:48:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 21:48:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 21:48:03,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:03,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:03,881 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:03,884 INFO L85 PathProgramCache]: Analyzing trace with hash 818818098, now seen corresponding path program 1 times [2022-01-31 21:48:03,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:03,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720950880] [2022-01-31 21:48:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:03,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:03,925 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:04,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:04,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 21:48:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:04,028 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 21:48:04,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:04,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720950880] [2022-01-31 21:48:04,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720950880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:04,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:04,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 21:48:04,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75022330] [2022-01-31 21:48:04,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:04,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 21:48:04,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:04,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 21:48:04,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:48:04,066 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:48:06,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 21:48:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:06,316 INFO L93 Difference]: Finished difference Result 65 states and 105 transitions. [2022-01-31 21:48:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 21:48:06,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-01-31 21:48:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:06,324 INFO L225 Difference]: With dead ends: 65 [2022-01-31 21:48:06,324 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 21:48:06,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 21:48:06,330 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:06,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 21:48:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 21:48:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 21:48:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 21:48:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-31 21:48:06,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-01-31 21:48:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:06,377 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-31 21:48:06,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:48:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-31 21:48:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 21:48:06,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:06,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:06,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:48:06,379 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1723375776, now seen corresponding path program 1 times [2022-01-31 21:48:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:06,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826337944] [2022-01-31 21:48:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:06,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:06,386 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:06,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:06,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 21:48:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:06,629 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 21:48:06,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826337944] [2022-01-31 21:48:06,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [826337944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:06,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:06,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:48:06,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159840024] [2022-01-31 21:48:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:06,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:48:06,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:48:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:48:06,631 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:48:08,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 21:48:10,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 21:48:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:14,834 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2022-01-31 21:48:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:48:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-31 21:48:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:14,836 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:48:14,836 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 21:48:14,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:48:14,837 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:14,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-01-31 21:48:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 21:48:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 21:48:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 21:48:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-01-31 21:48:14,850 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 19 [2022-01-31 21:48:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:14,850 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-01-31 21:48:14,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:48:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-01-31 21:48:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 21:48:14,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:14,851 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:48:14,851 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1182987237, now seen corresponding path program 1 times [2022-01-31 21:48:14,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:14,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689584821] [2022-01-31 21:48:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:14,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:14,869 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 21:48:14,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:14,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:15,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:15,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 21:48:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:15,075 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 21:48:15,076 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:15,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689584821] [2022-01-31 21:48:15,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689584821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:15,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:15,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:48:15,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445120533] [2022-01-31 21:48:15,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:15,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:48:15,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:15,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:48:15,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:48:15,082 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:48:18,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 21:48:23,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 21:48:25,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 21:48:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:26,096 INFO L93 Difference]: Finished difference Result 94 states and 141 transitions. [2022-01-31 21:48:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:48:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-01-31 21:48:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:26,098 INFO L225 Difference]: With dead ends: 94 [2022-01-31 21:48:26,098 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 21:48:26,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:48:26,100 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 128 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:26,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 52 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 290 Invalid, 3 Unknown, 0 Unchecked, 10.9s Time] [2022-01-31 21:48:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 21:48:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-01-31 21:48:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 21:48:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2022-01-31 21:48:26,117 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 21 [2022-01-31 21:48:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:26,118 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2022-01-31 21:48:26,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:48:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2022-01-31 21:48:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:48:26,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:26,118 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:26,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:48:26,119 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1777258624, now seen corresponding path program 1 times [2022-01-31 21:48:26,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:26,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18675716] [2022-01-31 21:48:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:26,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:26,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:26,130 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 21:48:26,130 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 21:48:26,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 21:48:26,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:48:26,143 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-31 21:48:26,144 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 21:48:26,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:48:26 BoogieIcfgContainer [2022-01-31 21:48:26,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 21:48:26,158 INFO L158 Benchmark]: Toolchain (without parser) took 22831.09ms. Allocated memory was 182.5MB in the beginning and 256.9MB in the end (delta: 74.4MB). Free memory was 135.2MB in the beginning and 213.4MB in the end (delta: -78.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 21:48:26,158 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 21:48:26,158 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.14ms. Allocated memory is still 182.5MB. Free memory was 134.9MB in the beginning and 160.0MB in the end (delta: -25.1MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. [2022-01-31 21:48:26,158 INFO L158 Benchmark]: Boogie Preprocessor took 21.94ms. Allocated memory is still 182.5MB. Free memory was 160.0MB in the beginning and 158.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 21:48:26,158 INFO L158 Benchmark]: RCFGBuilder took 249.04ms. Allocated memory is still 182.5MB. Free memory was 158.5MB in the beginning and 146.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 21:48:26,159 INFO L158 Benchmark]: TraceAbstraction took 22346.69ms. Allocated memory was 182.5MB in the beginning and 256.9MB in the end (delta: 74.4MB). Free memory was 145.9MB in the beginning and 213.4MB in the end (delta: -67.5MB). Peak memory consumption was 8.0MB. Max. memory is 8.0GB. [2022-01-31 21:48:26,160 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.14ms. Allocated memory is still 182.5MB. Free memory was 134.9MB in the beginning and 160.0MB in the end (delta: -25.1MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.94ms. Allocated memory is still 182.5MB. Free memory was 160.0MB in the beginning and 158.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 249.04ms. Allocated memory is still 182.5MB. Free memory was 158.5MB in the beginning and 146.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 22346.69ms. Allocated memory was 182.5MB in the beginning and 256.9MB in the end (delta: 74.4MB). Free memory was 145.9MB in the beginning and 213.4MB in the end (delta: -67.5MB). Peak memory consumption was 8.0MB. 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: 14]: 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: [L20] unsigned int n, p, q, r, h; [L22] n = __VERIFIER_nondet_uint() [L23] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n < 4294967295 / 4) [L25] p = 0 [L26] q = 1 [L27] r = n [L28] h = 0 [L29] COND TRUE 1 [L30] COND TRUE !(q <= n) [L37] COND TRUE 1 [L38] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r < 2 * p + q) [L39] CALL __VERIFIER_assert(p*p + r*q == n*q) [L12] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(p*p + r*q == n*q) [L40] CALL __VERIFIER_assert(h * h * h - 12 * h * n * q + 16 * n * p * q - h * q * q - 4 * p * q * q + 12 * h * q * r - 16 * p * q * r == 0) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.3s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 21.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 123 SdHoareTripleChecker+Valid, 21.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 99 mSDsluCounter, 148 SdHoareTripleChecker+Invalid, 21.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 456 IncrementalHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 164 mSolverCounterUnsat, 93 mSDtfsCounter, 456 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 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 21:48:26,173 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...