/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/divbin.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:07:15,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:07:15,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:07:15,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 04:07:15,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:07:15,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:07:15,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:07:15,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:07:15,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:07:15,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:07:15,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:07:15,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:07:15,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:07:15,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:07:15,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:07:15,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:07:15,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:07:15,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:07:15,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:07:15,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:07:15,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:07:15,745 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:07:15,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:07:15,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:07:15,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:07:15,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:07:15,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:07:15,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:07:15,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:07:15,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:07:15,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:07:15,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:07:15,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:07:15,748 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:07:15,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:07:15,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:07:15,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:07:15,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:07:15,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:07:15,932 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:07:15,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/divbin.i [2022-02-24 04:07:15,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d3a321a8/9ff841875cd94d948642a2562bd76438/FLAGbdc285296 [2022-02-24 04:07:16,335 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:07:16,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin.i [2022-02-24 04:07:16,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d3a321a8/9ff841875cd94d948642a2562bd76438/FLAGbdc285296 [2022-02-24 04:07:16,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d3a321a8/9ff841875cd94d948642a2562bd76438 [2022-02-24 04:07:16,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:07:16,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:07:16,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:07:16,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:07:16,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:07:16,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e33a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16, skipping insertion in model container [2022-02-24 04:07:16,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:07:16,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:07:16,504 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/divbin.i[950,963] [2022-02-24 04:07:16,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:07:16,520 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:07:16,527 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/divbin.i[950,963] [2022-02-24 04:07:16,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:07:16,539 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:07:16,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16 WrapperNode [2022-02-24 04:07:16,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:07:16,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:07:16,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:07:16,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:07:16,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:07:16,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:07:16,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:07:16,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:07:16,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (1/1) ... [2022-02-24 04:07:16,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:07:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:07:16,579 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) [2022-02-24 04:07:16,598 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 [2022-02-24 04:07:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:07:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:07:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:07:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 04:07:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:07:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:07:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:07:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:07:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 04:07:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 04:07:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:07:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:07:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 04:07:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 04:07:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:07:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:07:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:07:16,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:07:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:07:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:07:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:07:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:07:16,665 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:07:16,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:07:16,838 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:07:16,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:07:16,842 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 04:07:16,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:07:16 BoogieIcfgContainer [2022-02-24 04:07:16,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:07:16,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:07:16,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:07:16,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:07:16,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:07:16" (1/3) ... [2022-02-24 04:07:16,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159f0a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:07:16, skipping insertion in model container [2022-02-24 04:07:16,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:07:16" (2/3) ... [2022-02-24 04:07:16,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159f0a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:07:16, skipping insertion in model container [2022-02-24 04:07:16,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:07:16" (3/3) ... [2022-02-24 04:07:16,872 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin.i [2022-02-24 04:07:16,876 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:07:16,876 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:07:16,903 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:07:16,911 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 [2022-02-24 04:07:16,911 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:07:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 04:07:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 04:07:16,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:16,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:16,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1345265538, now seen corresponding path program 1 times [2022-02-24 04:07:16,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:16,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454702694] [2022-02-24 04:07:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:16,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:17,015 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:07:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:17,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:07:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:17,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:07:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 04:07:17,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:17,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454702694] [2022-02-24 04:07:17,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [454702694] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:17,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:17,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 04:07:17,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115140584] [2022-02-24 04:07:17,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:17,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 04:07:17,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 04:07:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 04:07:17,150 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 04:07:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:17,192 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-02-24 04:07:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 04:07:17,194 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-24 04:07:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:17,199 INFO L225 Difference]: With dead ends: 55 [2022-02-24 04:07:17,199 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 04:07:17,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 04:07:17,205 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:17,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:07:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 04:07:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 04:07:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 04:07:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-02-24 04:07:17,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2022-02-24 04:07:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:17,236 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-02-24 04:07:17,236 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 04:07:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-02-24 04:07:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 04:07:17,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:17,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:17,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:07:17,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1801528411, now seen corresponding path program 1 times [2022-02-24 04:07:17,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:17,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108126023] [2022-02-24 04:07:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:17,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:17,254 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:07:17,268 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-24 04:07:17,268 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-24 04:07:17,274 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:07:17,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:07:17,277 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-24 04:07:17,279 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:07:17,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:07:17 BoogieIcfgContainer [2022-02-24 04:07:17,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:07:17,297 INFO L158 Benchmark]: Toolchain (without parser) took 942.05ms. Allocated memory is still 232.8MB. Free memory was 183.0MB in the beginning and 169.2MB in the end (delta: 13.8MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-24 04:07:17,298 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 232.8MB. Free memory is still 199.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:07:17,299 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.03ms. Allocated memory is still 232.8MB. Free memory was 182.8MB in the beginning and 209.0MB in the end (delta: -26.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-24 04:07:17,301 INFO L158 Benchmark]: Boogie Preprocessor took 17.89ms. Allocated memory is still 232.8MB. Free memory was 209.0MB in the beginning and 207.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-24 04:07:17,302 INFO L158 Benchmark]: RCFGBuilder took 300.58ms. Allocated memory is still 232.8MB. Free memory was 207.5MB in the beginning and 197.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-24 04:07:17,304 INFO L158 Benchmark]: TraceAbstraction took 436.61ms. Allocated memory is still 232.8MB. Free memory was 196.4MB in the beginning and 169.2MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-02-24 04:07:17,305 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 232.8MB. Free memory is still 199.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.03ms. Allocated memory is still 232.8MB. Free memory was 182.8MB in the beginning and 209.0MB in the end (delta: -26.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.89ms. Allocated memory is still 232.8MB. Free memory was 209.0MB in the beginning and 207.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 300.58ms. Allocated memory is still 232.8MB. Free memory was 207.5MB in the beginning and 197.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 436.61ms. Allocated memory is still 232.8MB. Free memory was 196.4MB in the beginning and 169.2MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: 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: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L29] B = __VERIFIER_nondet_uint() [L30] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L30] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L31] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B >= 1) [L32] q = 0 [L33] r = A [L34] b = B [L35] COND TRUE 1 [L36] COND TRUE !(r >= b) [L39] COND TRUE 1 [L40] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 31 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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 [2022-02-24 04:07:17,330 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...