/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:09:03,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:09:03,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:09:03,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 04:09:03,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:09:03,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:09:03,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:09:03,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:09:03,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:09:03,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:09:03,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:09:03,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:09:03,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:09:03,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:09:03,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:09:03,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:09:03,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 04:09:03,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:09:03,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:09:03,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:09:03,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:09:03,626 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:09:03,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:09:03,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:09:03,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:09:03,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:09:03,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:09:03,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:09:03,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:09:03,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:09:03,628 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:09:03,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:09:03,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:09:03,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:09:03,629 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:09:03,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:09:03,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:09:03,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:09:03,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:09:03,835 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:09:03,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c [2022-02-15 04:09:03,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c508fa6a1/3cf596b70218498290e9fc1e6e6a9cd0/FLAGc4bce26fc [2022-02-15 04:09:04,241 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:09:04,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c [2022-02-15 04:09:04,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c508fa6a1/3cf596b70218498290e9fc1e6e6a9cd0/FLAGc4bce26fc [2022-02-15 04:09:04,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c508fa6a1/3cf596b70218498290e9fc1e6e6a9cd0 [2022-02-15 04:09:04,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:09:04,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:09:04,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:09:04,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:09:04,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:09:04,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f7162a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04, skipping insertion in model container [2022-02-15 04:09:04,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:09:04,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:09:04,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c[552,565] [2022-02-15 04:09:04,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:09:04,457 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:09:04,467 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c[552,565] [2022-02-15 04:09:04,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:09:04,494 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:09:04,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04 WrapperNode [2022-02-15 04:09:04,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:09:04,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:09:04,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:09:04,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:09:04,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:09:04,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:09:04,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:09:04,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:09:04,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (1/1) ... [2022-02-15 04:09:04,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:09:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:09:04,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 04:09:04,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 04:09:04,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:09:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:09:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:09:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 04:09:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 04:09:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:09:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:09:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:09:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:09:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:09:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:09:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:09:04,632 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:09:04,633 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:09:04,719 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:09:04,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:09:04,723 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 04:09:04,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:09:04 BoogieIcfgContainer [2022-02-15 04:09:04,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:09:04,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:09:04,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:09:04,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:09:04,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:09:04" (1/3) ... [2022-02-15 04:09:04,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d64edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:09:04, skipping insertion in model container [2022-02-15 04:09:04,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:04" (2/3) ... [2022-02-15 04:09:04,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d64edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:09:04, skipping insertion in model container [2022-02-15 04:09:04,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:09:04" (3/3) ... [2022-02-15 04:09:04,747 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound2.c [2022-02-15 04:09:04,750 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:09:04,750 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:09:04,779 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:09:04,783 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-15 04:09:04,784 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:09:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-15 04:09:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 04:09:04,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:09:04,799 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:09:04,799 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:09:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:09:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1520729432, now seen corresponding path program 1 times [2022-02-15 04:09:04,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:09:04,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288907183] [2022-02-15 04:09:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:09:04,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:09:04,873 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:09:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:09:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:09:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:09:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 04:09:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 04:09:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 04:09:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:09:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-15 04:09:05,085 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:09:05,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288907183] [2022-02-15 04:09:05,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288907183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:09:05,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:09:05,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 04:09:05,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558272285] [2022-02-15 04:09:05,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:09:05,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 04:09:05,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:09:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 04:09:05,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 04:09:05,112 INFO L87 Difference]: Start difference. First operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:09:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:09:05,209 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2022-02-15 04:09:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 04:09:05,211 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-02-15 04:09:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:09:05,218 INFO L225 Difference]: With dead ends: 73 [2022-02-15 04:09:05,219 INFO L226 Difference]: Without dead ends: 35 [2022-02-15 04:09:05,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 04:09:05,226 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:09:05,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:09:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-15 04:09:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-15 04:09:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 04:09:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-15 04:09:05,263 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-02-15 04:09:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:09:05,263 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-15 04:09:05,264 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:09:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-15 04:09:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 04:09:05,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:09:05,266 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:09:05,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:09:05,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:09:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:09:05,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1122529479, now seen corresponding path program 1 times [2022-02-15 04:09:05,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:09:05,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390526916] [2022-02-15 04:09:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:09:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:09:05,273 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:09:05,301 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-15 04:09:05,301 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-15 04:09:05,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:09:05,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:09:05,316 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-15 04:09:05,317 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 04:09:05,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 04:09:05 BoogieIcfgContainer [2022-02-15 04:09:05,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 04:09:05,331 INFO L158 Benchmark]: Toolchain (without parser) took 1065.13ms. Allocated memory is still 206.6MB. Free memory was 158.0MB in the beginning and 136.1MB in the end (delta: 21.9MB). Peak memory consumption was 20.6MB. Max. memory is 8.0GB. [2022-02-15 04:09:05,331 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 206.6MB. Free memory was 174.1MB in the beginning and 174.1MB in the end (delta: 82.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 04:09:05,332 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.10ms. Allocated memory is still 206.6MB. Free memory was 157.8MB in the beginning and 182.3MB in the end (delta: -24.4MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. [2022-02-15 04:09:05,334 INFO L158 Benchmark]: Boogie Preprocessor took 34.37ms. Allocated memory is still 206.6MB. Free memory was 182.3MB in the beginning and 180.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 04:09:05,334 INFO L158 Benchmark]: RCFGBuilder took 192.87ms. Allocated memory is still 206.6MB. Free memory was 180.7MB in the beginning and 169.9MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 04:09:05,336 INFO L158 Benchmark]: TraceAbstraction took 604.10ms. Allocated memory is still 206.6MB. Free memory was 169.4MB in the beginning and 136.1MB in the end (delta: 33.3MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. [2022-02-15 04:09:05,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 206.6MB. Free memory was 174.1MB in the beginning and 174.1MB in the end (delta: 82.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.10ms. Allocated memory is still 206.6MB. Free memory was 157.8MB in the beginning and 182.3MB in the end (delta: -24.4MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.37ms. Allocated memory is still 206.6MB. Free memory was 182.3MB in the beginning and 180.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 192.87ms. Allocated memory is still 206.6MB. Free memory was 180.7MB in the beginning and 169.9MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 604.10ms. Allocated memory is still 206.6MB. Free memory was 169.4MB in the beginning and 136.1MB in the end (delta: 33.3MB). Peak memory consumption was 32.5MB. 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: 17]: 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: [L23] unsigned a, b; [L24] unsigned x, y, u, v; [L25] a = __VERIFIER_nondet_uint() [L26] CALL assume_abort_if_not(a>=0 && a<=2) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(a>=0 && a<=2) [L27] b = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(b>=0 && b<=2) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(b>=0 && b<=2) [L29] CALL assume_abort_if_not(a >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(a >= 1) [L30] CALL assume_abort_if_not(b >= 1) [L12] COND FALSE !(!cond) [L30] RET assume_abort_if_not(b >= 1) [L32] CALL assume_abort_if_not(a <= 65535) [L12] COND FALSE !(!cond) [L32] RET assume_abort_if_not(a <= 65535) [L33] CALL assume_abort_if_not(b <= 65535) [L12] COND FALSE !(!cond) [L33] RET assume_abort_if_not(b <= 65535) [L35] x = a [L36] y = b [L37] u = b [L38] v = 0 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(x*u + y*v == a*b) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22 mSDsluCounter, 43 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 40 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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 [2022-02-15 04:09:05,365 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...