/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/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:13:14,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:13:14,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:13:14,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 04:13:14,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:13:14,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:13:14,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:13:14,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:13:14,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:13:14,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:13:14,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:13:14,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:13:14,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:13:14,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:13:14,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:13:14,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:13:14,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:13:14,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:13:14,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:13:14,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:13:14,124 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 04:13:14,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:13:14,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:13:14,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:13:14,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:13:14,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:13:14,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:13:14,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:13:14,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:13:14,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:13:14,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:13:14,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:13:14,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:13:14,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:13:14,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:13:14,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:13:14,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:13:14,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:13:14,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:13:14,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:13:14,139 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:13:14,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:13:14,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:13:14,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:13:14,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:13:14,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:13:14,370 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:13:14,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-02-24 04:13:14,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4373c7fb7/76557ccdba9249bd84beb013ec46835c/FLAGe712bf0f9 [2022-02-24 04:13:14,757 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:13:14,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-02-24 04:13:14,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4373c7fb7/76557ccdba9249bd84beb013ec46835c/FLAGe712bf0f9 [2022-02-24 04:13:14,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4373c7fb7/76557ccdba9249bd84beb013ec46835c [2022-02-24 04:13:14,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:13:14,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:13:14,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:13:14,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:13:14,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:13:14,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b43d322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14, skipping insertion in model container [2022-02-24 04:13:14,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:13:14,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:13:14,918 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/hard-u_valuebound20.c[537,550] [2022-02-24 04:13:14,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:13:14,939 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:13:14,948 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/hard-u_valuebound20.c[537,550] [2022-02-24 04:13:14,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:13:14,966 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:13:14,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14 WrapperNode [2022-02-24 04:13:14,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:13:14,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:13:14,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:13:14,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:13:14,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:13:14,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:13:14,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:13:14,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:13:14,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (1/1) ... [2022-02-24 04:13:14,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:13:15,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:13:15,009 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 04:13:15,011 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 04:13:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:13:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:13:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:13:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 04:13:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:13:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:13:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:13:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:13:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:13:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:13:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 04:13:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 04:13:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:13:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:13:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:13:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:13:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:13:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:13:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:13:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:13:15,084 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:13:15,086 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:13:15,224 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:13:15,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:13:15,228 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 04:13:15,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:13:15 BoogieIcfgContainer [2022-02-24 04:13:15,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:13:15,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:13:15,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:13:15,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:13:15,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:13:14" (1/3) ... [2022-02-24 04:13:15,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6155eb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:13:15, skipping insertion in model container [2022-02-24 04:13:15,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:14" (2/3) ... [2022-02-24 04:13:15,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6155eb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:13:15, skipping insertion in model container [2022-02-24 04:13:15,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:13:15" (3/3) ... [2022-02-24 04:13:15,245 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2022-02-24 04:13:15,250 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:13:15,250 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:13:15,302 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:13:15,323 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 04:13:15,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:13:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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) [2022-02-24 04:13:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:13:15,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:15,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:15,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-02-24 04:13:15,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:15,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538427380] [2022-02-24 04:13:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:15,406 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:13:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:13:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:13:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:13:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 04:13:15,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:15,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538427380] [2022-02-24 04:13:15,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [538427380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:15,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:15,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 04:13:15,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627097567] [2022-02-24 04:13:15,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:15,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 04:13:15,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 04:13:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 04:13:15,587 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 04:13:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:15,702 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-02-24 04:13:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 04:13:15,704 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-24 04:13:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:15,710 INFO L225 Difference]: With dead ends: 69 [2022-02-24 04:13:15,710 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 04:13:15,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 04:13:15,719 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:15,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:13:15,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 04:13:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 04:13:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-02-24 04:13:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-24 04:13:15,765 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-02-24 04:13:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:15,765 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-24 04:13:15,766 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 04:13:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-24 04:13:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:13:15,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:15,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:15,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:13:15,768 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-02-24 04:13:15,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:15,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809535834] [2022-02-24 04:13:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:15,772 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:13:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:13:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:13:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:13:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 04:13:15,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:15,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809535834] [2022-02-24 04:13:15,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [809535834] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:15,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:15,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:13:15,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190166309] [2022-02-24 04:13:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:15,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:13:15,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:13:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:13:15,940 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 04:13:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:16,117 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-24 04:13:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:13:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-24 04:13:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:16,119 INFO L225 Difference]: With dead ends: 46 [2022-02-24 04:13:16,120 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 04:13:16,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:13:16,123 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:16,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:13:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 04:13:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-24 04:13:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 04:13:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-24 04:13:16,131 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-02-24 04:13:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:16,131 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-24 04:13:16,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 04:13:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-24 04:13:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:13:16,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:16,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:16,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:13:16,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-02-24 04:13:16,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:16,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453591997] [2022-02-24 04:13:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:16,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:16,135 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:13:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:16,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:16,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:13:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:16,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:13:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:16,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:13:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:16,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:13:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 04:13:16,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:16,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453591997] [2022-02-24 04:13:16,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [453591997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:16,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:16,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:13:16,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710831135] [2022-02-24 04:13:16,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:16,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:13:16,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:13:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:13:16,298 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:13:16,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:16,464 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-02-24 04:13:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:13:16,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-24 04:13:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:16,466 INFO L225 Difference]: With dead ends: 50 [2022-02-24 04:13:16,466 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 04:13:16,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:13:16,467 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:16,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:13:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 04:13:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-02-24 04:13:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 04:13:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-02-24 04:13:16,474 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-02-24 04:13:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:16,474 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-02-24 04:13:16,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:13:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-02-24 04:13:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 04:13:16,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:16,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-02-24 04:13:16,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:13:16,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-02-24 04:13:16,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:16,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381471809] [2022-02-24 04:13:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:16,478 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:13:16,486 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-24 04:13:16,486 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-24 04:13:16,505 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:13:16,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:13:16,509 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-02-24 04:13:16,510 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:13:16,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:13:16 BoogieIcfgContainer [2022-02-24 04:13:16,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:13:16,529 INFO L158 Benchmark]: Toolchain (without parser) took 1741.36ms. Allocated memory was 213.9MB in the beginning and 270.5MB in the end (delta: 56.6MB). Free memory was 159.6MB in the beginning and 219.1MB in the end (delta: -59.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:13:16,529 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 213.9MB. Free memory is still 175.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:13:16,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.23ms. Allocated memory is still 213.9MB. Free memory was 159.4MB in the beginning and 186.4MB in the end (delta: -27.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-24 04:13:16,530 INFO L158 Benchmark]: Boogie Preprocessor took 18.20ms. Allocated memory is still 213.9MB. Free memory was 186.4MB in the beginning and 184.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 04:13:16,530 INFO L158 Benchmark]: RCFGBuilder took 244.41ms. Allocated memory is still 213.9MB. Free memory was 184.8MB in the beginning and 174.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-24 04:13:16,530 INFO L158 Benchmark]: TraceAbstraction took 1297.99ms. Allocated memory was 213.9MB in the beginning and 270.5MB in the end (delta: 56.6MB). Free memory was 173.8MB in the beginning and 219.1MB in the end (delta: -45.4MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-02-24 04:13:16,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 213.9MB. Free memory is still 175.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.23ms. Allocated memory is still 213.9MB. Free memory was 159.4MB in the beginning and 186.4MB in the end (delta: -27.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.20ms. Allocated memory is still 213.9MB. Free memory was 186.4MB in the beginning and 184.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 244.41ms. Allocated memory is still 213.9MB. Free memory was 184.8MB in the beginning and 174.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1297.99ms. Allocated memory was 213.9MB in the beginning and 270.5MB in the end (delta: 56.6MB). Free memory was 173.8MB in the beginning and 219.1MB in the end (delta: -45.4MB). Peak memory consumption was 11.6MB. 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 int A, B; [L24] unsigned int r, d, p, q; [L25] A = __VERIFIER_nondet_uint() [L26] CALL assume_abort_if_not(A>=0 && A<=20) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=20) [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B>=0 && B<=20) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=20) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 92 mSDsluCounter, 137 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 270 IncrementalHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 100 mSDtfsCounter, 270 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, InterpolantAutomatonStates: 17, 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, 3 MinimizatonAttempts, 14 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 [2022-02-24 04:13:16,560 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...