/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:11:55,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:11:55,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:11:55,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:11:55,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:11:55,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:11:55,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:11:55,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:11:55,859 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:11:55,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:11:55,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:11:55,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:11:55,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:11:55,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:11:55,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:11:55,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:11:55,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:11:55,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:11:55,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:11:55,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:11:55,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:11:55,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:11:55,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:11:55,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:11:55,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:11:55,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:11:55,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:11:55,864 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:11:55,864 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:11:56,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:11:56,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:11:56,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:11:56,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:11:56,135 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:11:56,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-02-24 03:11:56,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8692c1846/e0b73301adfd41539b25025a45009205/FLAG2a5c9ee57 [2022-02-24 03:11:56,585 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:11:56,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-02-24 03:11:56,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8692c1846/e0b73301adfd41539b25025a45009205/FLAG2a5c9ee57 [2022-02-24 03:11:56,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8692c1846/e0b73301adfd41539b25025a45009205 [2022-02-24 03:11:56,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:11:56,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:11:56,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:11:56,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:11:56,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:11:56,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:11:56" (1/1) ... [2022-02-24 03:11:56,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27336a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:56, skipping insertion in model container [2022-02-24 03:11:56,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:11:56" (1/1) ... [2022-02-24 03:11:57,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:11:57,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:11:57,168 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] [2022-02-24 03:11:57,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:11:57,199 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:11:57,210 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] [2022-02-24 03:11:57,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:11:57,232 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:11:57,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57 WrapperNode [2022-02-24 03:11:57,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:11:57,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:11:57,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:11:57,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:11:57,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:11:57,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:11:57,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:11:57,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:11:57,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (1/1) ... [2022-02-24 03:11:57,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:11:57,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:11:57,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 03:11:57,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 03:11:57,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:11:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:11:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:11:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 03:11:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:11:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:11:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:11:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:11:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 03:11:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 03:11:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:11:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:11:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 03:11:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:11:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 03:11:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:11:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:11:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:11:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:11:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:11:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:11:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:11:57,392 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:11:57,395 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:11:57,584 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:11:57,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:11:57,590 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:11:57,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:11:57 BoogieIcfgContainer [2022-02-24 03:11:57,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:11:57,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:11:57,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:11:57,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:11:57,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:11:56" (1/3) ... [2022-02-24 03:11:57,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae8c37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:11:57, skipping insertion in model container [2022-02-24 03:11:57,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:11:57" (2/3) ... [2022-02-24 03:11:57,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae8c37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:11:57, skipping insertion in model container [2022-02-24 03:11:57,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:11:57" (3/3) ... [2022-02-24 03:11:57,598 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2022-02-24 03:11:57,602 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:11:57,603 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:11:57,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:11:57,692 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 03:11:57,692 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:11:57,708 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) [2022-02-24 03:11:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-24 03:11:57,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:57,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:57,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash 343233864, now seen corresponding path program 1 times [2022-02-24 03:11:57,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:57,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891379109] [2022-02-24 03:11:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:57,811 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:11:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:57,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:57,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:57,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891379109] [2022-02-24 03:11:57,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [891379109] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:57,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:57,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:11:57,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747106694] [2022-02-24 03:11:57,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:57,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:11:57,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:11:57,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:11:57,990 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) [2022-02-24 03:11:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:58,110 INFO L93 Difference]: Finished difference Result 88 states and 157 transitions. [2022-02-24 03:11:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:11:58,112 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 [2022-02-24 03:11:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:58,119 INFO L225 Difference]: With dead ends: 88 [2022-02-24 03:11:58,119 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 03:11:58,122 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 [2022-02-24 03:11:58,125 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 [2022-02-24 03:11:58,126 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] [2022-02-24 03:11:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 03:11:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 03:11:58,162 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) [2022-02-24 03:11:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-02-24 03:11:58,165 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 13 [2022-02-24 03:11:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:58,166 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-02-24 03:11:58,166 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) [2022-02-24 03:11:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-02-24 03:11:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:11:58,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:58,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:58,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:11:58,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1474362961, now seen corresponding path program 1 times [2022-02-24 03:11:58,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:58,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964607190] [2022-02-24 03:11:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:58,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:58,171 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:11:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:58,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:58,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:58,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964607190] [2022-02-24 03:11:58,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964607190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:58,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:58,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:11:58,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031815893] [2022-02-24 03:11:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:58,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:11:58,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:11:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:11:58,292 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) [2022-02-24 03:11:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:58,534 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-02-24 03:11:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:11:58,534 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 [2022-02-24 03:11:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:58,538 INFO L225 Difference]: With dead ends: 49 [2022-02-24 03:11:58,538 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 03:11:58,544 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 [2022-02-24 03:11:58,546 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 [2022-02-24 03:11:58,547 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] [2022-02-24 03:11:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 03:11:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-24 03:11:58,568 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) [2022-02-24 03:11:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-24 03:11:58,570 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 14 [2022-02-24 03:11:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:58,571 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-24 03:11:58,571 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) [2022-02-24 03:11:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-24 03:11:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:11:58,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:58,572 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:58,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:11:58,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1520724128, now seen corresponding path program 1 times [2022-02-24 03:11:58,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:58,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930655025] [2022-02-24 03:11:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:58,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:58,585 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:11:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:58,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 03:11:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:58,705 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:58,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930655025] [2022-02-24 03:11:58,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [930655025] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:58,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:58,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:11:58,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245518815] [2022-02-24 03:11:58,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:58,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:11:58,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:11:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:11:58,708 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) [2022-02-24 03:11:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:59,001 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2022-02-24 03:11:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:11:59,001 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 [2022-02-24 03:11:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:59,003 INFO L225 Difference]: With dead ends: 62 [2022-02-24 03:11:59,003 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:11:59,003 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 [2022-02-24 03:11:59,004 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 [2022-02-24 03:11:59,005 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] [2022-02-24 03:11:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:11:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-24 03:11:59,014 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) [2022-02-24 03:11:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-02-24 03:11:59,015 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 19 [2022-02-24 03:11:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:59,016 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-02-24 03:11:59,016 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) [2022-02-24 03:11:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-02-24 03:11:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:11:59,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:59,017 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:11:59,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:11:59,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1868871511, now seen corresponding path program 1 times [2022-02-24 03:11:59,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:59,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803927456] [2022-02-24 03:11:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:59,020 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:11:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:59,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:59,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:11:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:59,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:59,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803927456] [2022-02-24 03:11:59,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [803927456] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:59,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:59,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:11:59,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086241048] [2022-02-24 03:11:59,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:59,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:11:59,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:11:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:11:59,134 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) [2022-02-24 03:11:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:11:59,367 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-02-24 03:11:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:11:59,367 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 [2022-02-24 03:11:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:11:59,369 INFO L225 Difference]: With dead ends: 60 [2022-02-24 03:11:59,369 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 03:11:59,369 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 [2022-02-24 03:11:59,370 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 [2022-02-24 03:11:59,371 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] [2022-02-24 03:11:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 03:11:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-02-24 03:11:59,387 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) [2022-02-24 03:11:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-02-24 03:11:59,388 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 20 [2022-02-24 03:11:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:11:59,388 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-02-24 03:11:59,388 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) [2022-02-24 03:11:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-02-24 03:11:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:11:59,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:11:59,390 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] [2022-02-24 03:11:59,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:11:59,390 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:11:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:11:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1843501053, now seen corresponding path program 1 times [2022-02-24 03:11:59,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:11:59,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982369517] [2022-02-24 03:11:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:11:59,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:11:59,490 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:11:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:11:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:59,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 03:11:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:11:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:11:59,820 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:11:59,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982369517] [2022-02-24 03:11:59,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982369517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:11:59,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:11:59,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:11:59,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230549506] [2022-02-24 03:11:59,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:11:59,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:11:59,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:11:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:11:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:11:59,823 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 11 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) [2022-02-24 03:12:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:00,329 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-02-24 03:12:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:12:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 11 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 [2022-02-24 03:12:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:00,332 INFO L225 Difference]: With dead ends: 105 [2022-02-24 03:12:00,332 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 03:12:00,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:12:00,334 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 132 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:00,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 71 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 329 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-02-24 03:12:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 03:12:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2022-02-24 03:12:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 52 states have internal predecessors, (56), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 03:12:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-02-24 03:12:00,367 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 34 [2022-02-24 03:12:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:00,367 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-02-24 03:12:00,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 11 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) [2022-02-24 03:12:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-02-24 03:12:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:12:00,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:00,374 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2022-02-24 03:12:00,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:12:00,374 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:00,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:00,375 INFO L85 PathProgramCache]: Analyzing trace with hash 110874648, now seen corresponding path program 1 times [2022-02-24 03:12:00,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:00,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759892390] [2022-02-24 03:12:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:00,378 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:00,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:00,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:00,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:00,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-24 03:12:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:00,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-24 03:12:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:00,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-24 03:12:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 03:12:00,517 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:00,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759892390] [2022-02-24 03:12:00,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [759892390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:00,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:00,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:12:00,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278678606] [2022-02-24 03:12:00,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:12:00,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:12:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:12:00,520 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-24 03:12:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:00,737 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-02-24 03:12:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-02-24 03:12:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:00,738 INFO L225 Difference]: With dead ends: 79 [2022-02-24 03:12:00,738 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 03:12:00,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:12:00,740 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:00,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:12:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 03:12:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 03:12:00,741 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) [2022-02-24 03:12:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 03:12:00,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2022-02-24 03:12:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:00,742 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 03:12:00,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-24 03:12:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 03:12:00,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 03:12:00,744 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 03:12:00,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:12:00,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 03:12:01,315 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-02-24 03:12:01,316 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-02-24 03:12:01,316 INFO L858 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-02-24 03:12:01,316 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-02-24 03:12:01,316 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-02-24 03:12:01,316 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-02-24 03:12:01,316 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-02-24 03:12:01,316 INFO L854 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,316 INFO L854 garLoopResultBuilder]: At program point L60-1(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,317 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 24 77) the Hoare annotation is: true [2022-02-24 03:12:01,317 INFO L854 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,317 INFO L854 garLoopResultBuilder]: At program point L56-1(line 56) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,317 INFO L854 garLoopResultBuilder]: At program point L48-2(lines 48 72) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,317 INFO L854 garLoopResultBuilder]: At program point L48-3(lines 48 72) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,317 INFO L854 garLoopResultBuilder]: At program point L73(line 73) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,317 INFO L854 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,317 INFO L854 garLoopResultBuilder]: At program point L32-2(lines 32 44) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,318 INFO L854 garLoopResultBuilder]: At program point L32-3(lines 32 44) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-02-24 03:12:01,318 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (not (<= main_~tagbuf_len~0 main_~t~0)) (<= 0 main_~t~0)) [2022-02-24 03:12:01,318 INFO L854 garLoopResultBuilder]: At program point L49(lines 49 53) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,318 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-02-24 03:12:01,318 INFO L861 garLoopResultBuilder]: At program point L74(lines 25 77) the Hoare annotation is: true [2022-02-24 03:12:01,318 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-02-24 03:12:01,318 INFO L854 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-02-24 03:12:01,318 INFO L854 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: (and (not (<= main_~tagbuf_len~0 main_~t~0)) (<= 0 main_~t~0)) [2022-02-24 03:12:01,319 INFO L854 garLoopResultBuilder]: At program point L66(lines 66 68) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,319 INFO L854 garLoopResultBuilder]: At program point L33(lines 33 37) the Hoare annotation is: (and (<= 0 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-02-24 03:12:01,319 INFO L861 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-02-24 03:12:01,319 INFO L854 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (<= 1 main_~tagbuf_len~0) [2022-02-24 03:12:01,319 INFO L854 garLoopResultBuilder]: At program point L54(lines 54 68) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,319 INFO L854 garLoopResultBuilder]: At program point L54-1(lines 54 68) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,319 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,319 INFO L854 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,320 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-02-24 03:12:01,320 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 24 77) the Hoare annotation is: true [2022-02-24 03:12:01,320 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,320 INFO L854 garLoopResultBuilder]: At program point L38(lines 38 40) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= 0 (+ 2147483648 |main_#t~nondet3|)) (<= |main_#t~nondet3| 2147483647) (= main_~t~0 0)) [2022-02-24 03:12:01,320 INFO L854 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,320 INFO L854 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,320 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 24 77) the Hoare annotation is: true [2022-02-24 03:12:01,320 INFO L854 garLoopResultBuilder]: At program point L59(lines 59 63) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,321 INFO L854 garLoopResultBuilder]: At program point L55(lines 55 64) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-24 03:12:01,321 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-02-24 03:12:01,321 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-24 03:12:01,321 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-02-24 03:12:01,321 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-02-24 03:12:01,321 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-24 03:12:01,321 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-24 03:12:01,321 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-02-24 03:12:01,321 INFO L854 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0)) [2022-02-24 03:12:01,321 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-02-24 03:12:01,321 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0)) [2022-02-24 03:12:01,322 INFO L854 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-24 03:12:01,322 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-24 03:12:01,322 INFO L854 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0)) [2022-02-24 03:12:01,325 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-02-24 03:12:01,326 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 03:12:01,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:12:01 BoogieIcfgContainer [2022-02-24 03:12:01,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 03:12:01,339 INFO L158 Benchmark]: Toolchain (without parser) took 4347.43ms. Allocated memory was 182.5MB in the beginning and 235.9MB in the end (delta: 53.5MB). Free memory was 126.2MB in the beginning and 162.2MB in the end (delta: -35.9MB). Peak memory consumption was 108.0MB. Max. memory is 8.0GB. [2022-02-24 03:12:01,339 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 03:12:01,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.05ms. Allocated memory was 182.5MB in the beginning and 235.9MB in the end (delta: 53.5MB). Free memory was 126.1MB in the beginning and 207.3MB in the end (delta: -81.2MB). Peak memory consumption was 13.5MB. Max. memory is 8.0GB. [2022-02-24 03:12:01,339 INFO L158 Benchmark]: Boogie Preprocessor took 26.92ms. Allocated memory is still 235.9MB. Free memory was 207.3MB in the beginning and 205.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-24 03:12:01,340 INFO L158 Benchmark]: RCFGBuilder took 330.66ms. Allocated memory is still 235.9MB. Free memory was 205.7MB in the beginning and 193.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-24 03:12:01,340 INFO L158 Benchmark]: TraceAbstraction took 3745.24ms. Allocated memory is still 235.9MB. Free memory was 193.1MB in the beginning and 162.2MB in the end (delta: 31.0MB). Peak memory consumption was 122.3MB. Max. memory is 8.0GB. [2022-02-24 03:12:01,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 240.05ms. Allocated memory was 182.5MB in the beginning and 235.9MB in the end (delta: 53.5MB). Free memory was 126.1MB in the beginning and 207.3MB in the end (delta: -81.2MB). Peak memory consumption was 13.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.92ms. Allocated memory is still 235.9MB. Free memory was 207.3MB in the beginning and 205.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 330.66ms. Allocated memory is still 235.9MB. Free memory was 205.7MB in the beginning and 193.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 3745.24ms. Allocated memory is still 235.9MB. Free memory was 193.1MB in the beginning and 162.2MB in the end (delta: 31.0MB). Peak memory consumption was 122.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 382 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 357 mSDsluCounter, 370 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 86 IncrementalHoareTripleChecker+Unchecked, 133 mSDsCounter, 391 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1157 IncrementalHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 391 mSolverCounterUnsat, 237 mSDtfsCounter, 1157 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=5, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 37 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 48 LocationsWithAnnotation, 294 PreInvPairs, 418 NumberOfFragments, 277 HoareAnnotationTreeSize, 294 FomulaSimplifications, 132 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 48 FomulaSimplificationsInter, 1533 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: (1 <= tagbuf_len && t <= tagbuf_len) && 0 <= t - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || \old(cond) == 0 RESULT: Ultimate proved your program to be correct! [2022-02-24 03:12:01,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...