/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:29:44,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:29:44,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:29:44,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:29:44,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:29:44,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:29:44,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:29:44,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:29:44,660 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:29:44,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:29:44,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:29:44,661 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:29:44,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:29:44,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:29:44,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:29:44,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:29:44,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:29:44,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:29:44,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:29:44,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:29:44,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:29:44,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:29:44,664 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:29:44,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:29:44,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:29:44,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:29:44,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:29:44,850 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:29:44,851 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:29:44,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-02-15 01:29:44,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e84895a/a3716a93423a48b7b24b43a58d8ef84b/FLAGbc142b83c [2022-02-15 01:29:45,268 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:29:45,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-02-15 01:29:45,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e84895a/a3716a93423a48b7b24b43a58d8ef84b/FLAGbc142b83c [2022-02-15 01:29:45,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e84895a/a3716a93423a48b7b24b43a58d8ef84b [2022-02-15 01:29:45,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:29:45,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:29:45,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:29:45,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:29:45,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:29:45,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de37610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45, skipping insertion in model container [2022-02-15 01:29:45,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:29:45,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:29:45,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i[893,906] [2022-02-15 01:29:45,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:29:45,900 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:29:45,908 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i[893,906] [2022-02-15 01:29:45,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:29:45,923 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:29:45,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45 WrapperNode [2022-02-15 01:29:45,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:29:45,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:29:45,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:29:45,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:29:45,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:29:45,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:29:45,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:29:45,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:29:45,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (1/1) ... [2022-02-15 01:29:45,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:29:45,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:29:45,984 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 01:29:46,011 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 [2022-02-15 01:29:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:29:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:29:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:29:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:29:46,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:29:46,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:29:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:29:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:29:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:29:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:29:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:29:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:29:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:29:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:29:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:29:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:29:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:29:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:29:46,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:29:46,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:29:46,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:29:46,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:29:46,102 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:29:46,103 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:29:46,237 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:29:46,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:29:46,243 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:29:46,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:29:46 BoogieIcfgContainer [2022-02-15 01:29:46,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:29:46,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:29:46,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:29:46,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:29:46,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:29:45" (1/3) ... [2022-02-15 01:29:46,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191e5448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:29:46, skipping insertion in model container [2022-02-15 01:29:46,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:29:45" (2/3) ... [2022-02-15 01:29:46,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191e5448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:29:46, skipping insertion in model container [2022-02-15 01:29:46,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:29:46" (3/3) ... [2022-02-15 01:29:46,252 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2022-02-15 01:29:46,256 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:29:46,256 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:29:46,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:29:46,298 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:29:46,298 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:29:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:29:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 01:29:46,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:46,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:46,334 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash 343233864, now seen corresponding path program 1 times [2022-02-15 01:29:46,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:46,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755449621] [2022-02-15 01:29:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:46,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:46,395 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:46,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:46,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:46,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755449621] [2022-02-15 01:29:46,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755449621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:46,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:46,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:29:46,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848125812] [2022-02-15 01:29:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:46,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:29:46,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:29:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:29:46,527 INFO L87 Difference]: Start difference. First operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:46,675 INFO L93 Difference]: Finished difference Result 88 states and 157 transitions. [2022-02-15 01:29:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:29:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-15 01:29:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:46,690 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:29:46,691 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 01:29:46,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:29:46,699 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:46,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 57 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:29:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 01:29:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-15 01:29:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-15 01:29:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-02-15 01:29:46,737 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 13 [2022-02-15 01:29:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:46,738 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-02-15 01:29:46,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-02-15 01:29:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:29:46,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:46,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:46,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:29:46,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:46,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1474362961, now seen corresponding path program 1 times [2022-02-15 01:29:46,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:46,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754941701] [2022-02-15 01:29:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:46,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:46,745 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:46,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:46,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:46,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754941701] [2022-02-15 01:29:46,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [754941701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:46,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:46,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:29:46,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86725237] [2022-02-15 01:29:46,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:46,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:29:46,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:29:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:29:46,869 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:47,125 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-02-15 01:29:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:29:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 01:29:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:47,127 INFO L225 Difference]: With dead ends: 49 [2022-02-15 01:29:47,127 INFO L226 Difference]: Without dead ends: 47 [2022-02-15 01:29:47,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:29:47,129 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:47,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 54 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:29:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-15 01:29:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-15 01:29:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-15 01:29:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-15 01:29:47,155 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 14 [2022-02-15 01:29:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:47,156 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-15 01:29:47,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-15 01:29:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:29:47,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:47,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:47,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:29:47,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1520724128, now seen corresponding path program 1 times [2022-02-15 01:29:47,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:47,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035382402] [2022-02-15 01:29:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:47,161 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:47,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:47,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 01:29:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:47,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:47,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035382402] [2022-02-15 01:29:47,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035382402] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:47,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:47,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:29:47,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268380223] [2022-02-15 01:29:47,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:47,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:29:47,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:29:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:29:47,321 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:29:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:47,592 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2022-02-15 01:29:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:29:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-02-15 01:29:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:47,596 INFO L225 Difference]: With dead ends: 62 [2022-02-15 01:29:47,596 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 01:29:47,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:29:47,603 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:47,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:29:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 01:29:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-15 01:29:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 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) [2022-02-15 01:29:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-02-15 01:29:47,615 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 19 [2022-02-15 01:29:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:47,615 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-02-15 01:29:47,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:29:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-02-15 01:29:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:29:47,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:47,616 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:47,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:29:47,616 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1868871511, now seen corresponding path program 1 times [2022-02-15 01:29:47,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:47,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053293625] [2022-02-15 01:29:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:47,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:47,619 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:29:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:47,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:47,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053293625] [2022-02-15 01:29:47,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053293625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:47,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:47,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:29:47,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005273373] [2022-02-15 01:29:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:47,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:29:47,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:29:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:29:47,720 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:29:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:47,952 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-02-15 01:29:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:29:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-15 01:29:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:47,954 INFO L225 Difference]: With dead ends: 60 [2022-02-15 01:29:47,954 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 01:29:47,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:29:47,958 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:47,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:29:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 01:29:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-02-15 01:29:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 01:29:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-02-15 01:29:47,978 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 20 [2022-02-15 01:29:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:47,979 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-02-15 01:29:47,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:29:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-02-15 01:29:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:29:47,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:47,981 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:47,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:29:47,981 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1843501053, now seen corresponding path program 1 times [2022-02-15 01:29:47,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:47,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816193938] [2022-02-15 01:29:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:48,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:29:48,180 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:29:48,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:48,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:48,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:29:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:18,896 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:18,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816193938] [2022-02-15 01:30:18,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [816193938] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:18,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:18,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:30:18,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593436370] [2022-02-15 01:30:18,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:18,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:30:18,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:30:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=328, Unknown=25, NotChecked=0, Total=420 [2022-02-15 01:30:18,898 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:30:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:39,889 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2022-02-15 01:30:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:30:39,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.5) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-02-15 01:30:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:39,893 INFO L225 Difference]: With dead ends: 99 [2022-02-15 01:30:39,894 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:30:39,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=151, Invalid=790, Unknown=51, NotChecked=0, Total=992 [2022-02-15 01:30:39,895 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 57 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:39,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 104 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 295 Invalid, 0 Unknown, 351 Unchecked, 0.3s Time] [2022-02-15 01:30:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:30:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-02-15 01:30:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 01:30:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-02-15 01:30:39,909 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 34 [2022-02-15 01:30:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:39,909 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-02-15 01:30:39,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.5) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:30:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-02-15 01:30:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:30:39,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:39,911 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:39,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:30:39,915 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1533190621, now seen corresponding path program 2 times [2022-02-15 01:30:39,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:39,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973310436] [2022-02-15 01:30:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:40,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:40,000 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:30:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:51,290 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:51,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973310436] [2022-02-15 01:31:51,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973310436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:51,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:51,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:31:51,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919307711] [2022-02-15 01:31:51,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:31:51,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:31:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=743, Unknown=59, NotChecked=0, Total=930 [2022-02-15 01:31:51,292 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:32:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:10,729 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2022-02-15 01:32:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:32:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-02-15 01:32:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:10,732 INFO L225 Difference]: With dead ends: 111 [2022-02-15 01:32:10,732 INFO L226 Difference]: Without dead ends: 109 [2022-02-15 01:32:10,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 90.1s TimeCoverageRelationStatistics Valid=227, Invalid=1489, Unknown=90, NotChecked=0, Total=1806 [2022-02-15 01:32:10,734 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 69 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:10,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 236 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 159 Invalid, 0 Unknown, 436 Unchecked, 0.2s Time] [2022-02-15 01:32:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-15 01:32:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2022-02-15 01:32:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 61 states have internal predecessors, (67), 20 states have call successors, (20), 12 states have call predecessors, (20), 10 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:32:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-02-15 01:32:10,751 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 48 [2022-02-15 01:32:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:10,752 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-02-15 01:32:10,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:32:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-02-15 01:32:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:32:10,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:10,753 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:10,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:32:10,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1004819677, now seen corresponding path program 1 times [2022-02-15 01:32:10,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:10,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151651287] [2022-02-15 01:32:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:10,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:32:10,818 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:32:10,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:32:10,902 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:32:10,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:10,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:10,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:32:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:33:21,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:33:21,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151651287] [2022-02-15 01:33:21,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [151651287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:33:21,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:33:21,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:33:21,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910864902] [2022-02-15 01:33:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:33:21,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:33:21,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:33:21,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:33:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=743, Unknown=56, NotChecked=0, Total=930 [2022-02-15 01:33:21,857 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:34:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:34:26,056 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2022-02-15 01:34:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:34:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-02-15 01:34:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:34:26,058 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:34:26,058 INFO L226 Difference]: Without dead ends: 90 [2022-02-15 01:34:26,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 134.8s TimeCoverageRelationStatistics Valid=334, Invalid=2028, Unknown=88, NotChecked=0, Total=2450 [2022-02-15 01:34:26,060 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:34:26,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 120 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 50 Invalid, 0 Unknown, 157 Unchecked, 0.0s Time] [2022-02-15 01:34:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-15 01:34:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2022-02-15 01:34:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 50 states have internal predecessors, (55), 16 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 01:34:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-02-15 01:34:26,076 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 48 [2022-02-15 01:34:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:34:26,076 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-02-15 01:34:26,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:34:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-02-15 01:34:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:34:26,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:34:26,078 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 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, 1, 1, 1, 1] [2022-02-15 01:34:26,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:34:26,078 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:34:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:34:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1190035473, now seen corresponding path program 1 times [2022-02-15 01:34:26,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:34:26,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325017386] [2022-02-15 01:34:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:34:26,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:34:26,150 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:34:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:34:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:26,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:26,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:34:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:26,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:34:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:26,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:34:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:34:58,808 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:58,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325017386] [2022-02-15 01:34:58,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [325017386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:58,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:58,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:34:58,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884225342] [2022-02-15 01:34:58,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:58,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:34:58,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:34:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=363, Unknown=28, NotChecked=0, Total=462 [2022-02-15 01:34:58,809 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-15 01:35:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:12,787 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-02-15 01:35:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:35:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-02-15 01:35:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:12,789 INFO L225 Difference]: With dead ends: 78 [2022-02-15 01:35:12,789 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 01:35:12,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=135, Invalid=746, Unknown=49, NotChecked=0, Total=930 [2022-02-15 01:35:12,790 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:12,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 159 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 149 Invalid, 0 Unknown, 261 Unchecked, 0.1s Time] [2022-02-15 01:35:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 01:35:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-02-15 01:35:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 50 states have internal predecessors, (55), 16 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 01:35:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-02-15 01:35:12,806 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 49 [2022-02-15 01:35:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:12,807 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-02-15 01:35:12,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-15 01:35:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-02-15 01:35:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:35:12,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:35:12,808 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 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, 1, 1, 1, 1] [2022-02-15 01:35:12,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:35:12,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:35:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:35:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 820337557, now seen corresponding path program 1 times [2022-02-15 01:35:12,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:35:12,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781046964] [2022-02-15 01:35:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:35:12,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:35:12,890 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:35:12,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:35:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:12,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:35:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:12,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:35:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:12,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:35:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:35:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:35:45,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:35:45,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781046964] [2022-02-15 01:35:45,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781046964] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:35:45,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:35:45,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:35:45,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273772564] [2022-02-15 01:35:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:35:45,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:35:45,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:35:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:35:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=363, Unknown=28, NotChecked=0, Total=462 [2022-02-15 01:35:45,321 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-15 01:35:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:59,628 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-02-15 01:35:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:35:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-02-15 01:35:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:59,629 INFO L225 Difference]: With dead ends: 74 [2022-02-15 01:35:59,629 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 01:35:59,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=134, Invalid=746, Unknown=50, NotChecked=0, Total=930 [2022-02-15 01:35:59,631 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:59,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 130 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 206 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2022-02-15 01:35:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 01:35:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 01:35:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 01:35:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 01:35:59,632 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2022-02-15 01:35:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:59,632 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 01:35:59,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-15 01:35:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 01:35:59,632 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 01:35:59,634 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:35:59,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:35:59,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-15 01:36:13,124 WARN L228 SmtUtils]: Spent 13.26s on a formula simplification. DAG size of input: 432 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:36:22,046 WARN L228 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 162 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:36:30,516 WARN L228 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 85 DAG size of output: 16 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:36:57,571 WARN L228 SmtUtils]: Spent 27.05s on a formula simplification. DAG size of input: 454 DAG size of output: 227 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:37:04,839 WARN L228 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 161 DAG size of output: 8 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:37:17,655 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-02-15 01:37:17,656 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 101 [2022-02-15 01:37:17,657 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:193) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:260) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeIcfgHoareAnnotation(BasicCegarLoop.java:1184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:832) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:350) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 39 more [2022-02-15 01:37:17,661 INFO L158 Benchmark]: Toolchain (without parser) took 451964.21ms. Allocated memory was 189.8MB in the beginning and 296.7MB in the end (delta: 107.0MB). Free memory was 134.0MB in the beginning and 229.5MB in the end (delta: -95.5MB). Peak memory consumption was 142.8MB. Max. memory is 8.0GB. [2022-02-15 01:37:17,661 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 189.8MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 01:37:17,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.00ms. Allocated memory was 189.8MB in the beginning and 296.7MB in the end (delta: 107.0MB). Free memory was 133.8MB in the beginning and 268.2MB in the end (delta: -134.5MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-02-15 01:37:17,661 INFO L158 Benchmark]: Boogie Preprocessor took 22.56ms. Allocated memory is still 296.7MB. Free memory was 268.2MB in the beginning and 266.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 01:37:17,662 INFO L158 Benchmark]: RCFGBuilder took 296.55ms. Allocated memory is still 296.7MB. Free memory was 266.6MB in the beginning and 254.6MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 01:37:17,662 INFO L158 Benchmark]: TraceAbstraction took 451414.47ms. Allocated memory is still 296.7MB. Free memory was 254.4MB in the beginning and 229.5MB in the end (delta: 25.0MB). Peak memory consumption was 157.9MB. Max. memory is 8.0GB. [2022-02-15 01:37:17,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 189.8MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 225.00ms. Allocated memory was 189.8MB in the beginning and 296.7MB in the end (delta: 107.0MB). Free memory was 133.8MB in the beginning and 268.2MB in the end (delta: -134.5MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.56ms. Allocated memory is still 296.7MB. Free memory was 268.2MB in the beginning and 266.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 296.55ms. Allocated memory is still 296.7MB. Free memory was 266.6MB in the beginning and 254.6MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 451414.47ms. Allocated memory is still 296.7MB. Free memory was 254.4MB in the beginning and 229.5MB in the end (delta: 25.0MB). Peak memory consumption was 157.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...