/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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:18:21,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:18:21,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:18:21,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 07:18:21,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:18:21,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:18:21,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:18:21,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:18:21,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:18:21,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:18:21,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:18:21,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:18:21,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:18:21,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:18:21,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:18:21,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:18:21,909 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:18:21,909 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:18:21,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:18:21,910 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:18:21,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:18:22,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:18:22,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:18:22,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:18:22,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:18:22,144 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:18:22,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2022-03-19 07:18:22,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abdaa16d2/fe7265ae73e24058ad4341de281b24d6/FLAGf9ad118ea [2022-03-19 07:18:22,571 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:18:22,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2022-03-19 07:18:22,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abdaa16d2/fe7265ae73e24058ad4341de281b24d6/FLAGf9ad118ea [2022-03-19 07:18:22,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abdaa16d2/fe7265ae73e24058ad4341de281b24d6 [2022-03-19 07:18:22,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:18:22,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:18:22,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:18:22,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:18:22,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:18:22,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1407760e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22, skipping insertion in model container [2022-03-19 07:18:22,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:18:22,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:18:22,773 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2022-03-19 07:18:22,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:18:22,811 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:18:22,824 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2022-03-19 07:18:22,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:18:22,860 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:18:22,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22 WrapperNode [2022-03-19 07:18:22,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:18:22,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:18:22,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:18:22,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:18:22,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:18:22,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:18:22,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:18:22,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:18:22,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (1/1) ... [2022-03-19 07:18:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:18:22,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:22,919 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) [2022-03-19 07:18:22,948 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 [2022-03-19 07:18:22,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:18:22,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:18:22,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:18:22,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:18:22,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:18:22,961 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:18:22,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:18:22,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:18:22,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:18:22,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:18:22,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:18:22,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:18:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:18:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-19 07:18:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:18:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:18:23,031 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:18:23,033 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:18:23,122 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:18:23,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:18:23,126 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 07:18:23,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:18:23 BoogieIcfgContainer [2022-03-19 07:18:23,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:18:23,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:18:23,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:18:23,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:18:23,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:18:22" (1/3) ... [2022-03-19 07:18:23,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434e35f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:18:23, skipping insertion in model container [2022-03-19 07:18:23,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:22" (2/3) ... [2022-03-19 07:18:23,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434e35f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:18:23, skipping insertion in model container [2022-03-19 07:18:23,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:18:23" (3/3) ... [2022-03-19 07:18:23,149 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2022-03-19 07:18:23,153 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:18:23,153 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:18:23,197 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:18:23,204 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-03-19 07:18:23,204 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:18:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:18:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-19 07:18:23,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:23,222 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:23,222 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2022-03-19 07:18:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:23,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2015365650] [2022-03-19 07:18:23,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:18:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 2 times [2022-03-19 07:18:23,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:23,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927778919] [2022-03-19 07:18:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:23,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927778919] [2022-03-19 07:18:23,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927778919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:23,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:23,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:18:23,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:23,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2015365650] [2022-03-19 07:18:23,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2015365650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:23,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:23,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:18:23,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127691617] [2022-03-19 07:18:23,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:23,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 07:18:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 07:18:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 07:18:23,476 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:23,535 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2022-03-19 07:18:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 07:18:23,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-19 07:18:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:23,543 INFO L225 Difference]: With dead ends: 42 [2022-03-19 07:18:23,543 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 07:18:23,545 INFO L911 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 [2022-03-19 07:18:23,550 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:23,551 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 07:18:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2022-03-19 07:18:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-03-19 07:18:23,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-03-19 07:18:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:23,578 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-03-19 07:18:23,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-03-19 07:18:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-19 07:18:23,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:23,579 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:23,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:18:23,579 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2022-03-19 07:18:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046045086] [2022-03-19 07:18:23,581 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:18:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 2 times [2022-03-19 07:18:23,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731580224] [2022-03-19 07:18:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:23,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:23,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731580224] [2022-03-19 07:18:23,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731580224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:23,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:23,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:23,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1046045086] [2022-03-19 07:18:23,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1046045086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:23,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:23,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101254548] [2022-03-19 07:18:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:23,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:18:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:18:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:18:23,661 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:23,736 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-03-19 07:18:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:18:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-19 07:18:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:23,737 INFO L225 Difference]: With dead ends: 36 [2022-03-19 07:18:23,737 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 07:18:23,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:23,738 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:23,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:18:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 07:18:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2022-03-19 07:18:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-19 07:18:23,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-03-19 07:18:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:23,743 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-19 07:18:23,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-19 07:18:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 07:18:23,743 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:23,743 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:23,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 07:18:23,744 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:23,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2022-03-19 07:18:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:23,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307887972] [2022-03-19 07:18:23,883 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:18:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash 254700179, now seen corresponding path program 1 times [2022-03-19 07:18:23,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:23,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362981625] [2022-03-19 07:18:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:23,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:23,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362981625] [2022-03-19 07:18:23,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362981625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:23,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:23,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:24,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:24,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307887972] [2022-03-19 07:18:24,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307887972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:24,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:24,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:18:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850744417] [2022-03-19 07:18:24,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:24,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:18:24,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:18:24,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:24,020 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:24,110 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-19 07:18:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:18:24,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 07:18:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:24,113 INFO L225 Difference]: With dead ends: 48 [2022-03-19 07:18:24,113 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 07:18:24,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 07:18:24,116 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:24,119 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 19 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:18:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 07:18:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 17. [2022-03-19 07:18:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 07:18:24,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-03-19 07:18:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:24,123 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 07:18:24,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 07:18:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 07:18:24,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:24,124 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:24,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 07:18:24,124 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2022-03-19 07:18:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1462393166] [2022-03-19 07:18:24,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-19 07:18:24,365 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:24,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 2 times [2022-03-19 07:18:24,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:24,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967634032] [2022-03-19 07:18:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:24,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:24,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:24,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967634032] [2022-03-19 07:18:24,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967634032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:24,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:24,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:24,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1462393166] [2022-03-19 07:18:24,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1462393166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:24,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:24,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:24,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956361371] [2022-03-19 07:18:24,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:24,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:18:24,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:18:24,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:18:24,418 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:24,452 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-03-19 07:18:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:18:24,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 07:18:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:24,453 INFO L225 Difference]: With dead ends: 29 [2022-03-19 07:18:24,453 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 07:18:24,455 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:24,457 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:24,458 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:24,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 07:18:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-19 07:18:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-19 07:18:24,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-03-19 07:18:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:24,464 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-19 07:18:24,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-19 07:18:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 07:18:24,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:24,465 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:24,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 07:18:24,465 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2022-03-19 07:18:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [114107309] [2022-03-19 07:18:24,544 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:24,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:24,547 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:24,547 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 2 times [2022-03-19 07:18:24,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:24,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090111178] [2022-03-19 07:18:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:24,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:24,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:24,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090111178] [2022-03-19 07:18:24,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090111178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149798543] [2022-03-19 07:18:24,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:24,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:24,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:24,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:18:24,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 07:18:24,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 07:18:24,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 07:18:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 07:18:24,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 07:18:24,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149798543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:24,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 07:18:24,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-03-19 07:18:24,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:24,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [114107309] [2022-03-19 07:18:24,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [114107309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:24,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:24,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:18:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498841578] [2022-03-19 07:18:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:24,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 07:18:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 07:18:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 07:18:24,715 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:24,716 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-03-19 07:18:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 07:18:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 07:18:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:24,717 INFO L225 Difference]: With dead ends: 18 [2022-03-19 07:18:24,717 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 07:18:24,717 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 07:18:24,718 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:24,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 07:18:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 07:18:24,718 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) [2022-03-19 07:18:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 07:18:24,719 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-03-19 07:18:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:24,719 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 07:18:24,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 07:18:24,719 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 07:18:24,721 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 07:18:24,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:24,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:24,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 07:18:24,977 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-19 07:18:24,977 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-19 07:18:24,978 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-19 07:18:24,978 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-19 07:18:24,978 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#array~0.offset| |old(~#array~0.offset)|) (= |#memory_int| |old(#memory_int)|) (= |old(~#array~0.base)| |~#array~0.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 07:18:24,978 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-19 07:18:24,978 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 07:18:24,978 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 07:18:24,978 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 07:18:24,978 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 07:18:24,979 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 7 23) the Hoare annotation is: true [2022-03-19 07:18:24,979 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 7 23) the Hoare annotation is: true [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point L13-2(lines 13 15) the Hoare annotation is: (= main_~a~0 1) [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point L13-3(lines 13 15) the Hoare annotation is: (= main_~a~0 1) [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) the Hoare annotation is: false [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 7 23) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point L18(lines 8 23) the Hoare annotation is: false [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point L14-2(lines 14 15) the Hoare annotation is: (= main_~a~0 1) [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point L14-3(lines 14 15) the Hoare annotation is: (= main_~a~0 1) [2022-03-19 07:18:24,979 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 12 15) the Hoare annotation is: (= main_~a~0 1) [2022-03-19 07:18:24,980 INFO L878 garLoopResultBuilder]: At program point L12-3(lines 12 15) the Hoare annotation is: (= main_~a~0 1) [2022-03-19 07:18:24,980 INFO L878 garLoopResultBuilder]: At program point L12-4(lines 8 23) the Hoare annotation is: (= main_~a~0 1) [2022-03-19 07:18:24,982 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1] [2022-03-19 07:18:24,983 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 07:18:25,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 07:18:25 BoogieIcfgContainer [2022-03-19 07:18:25,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 07:18:25,007 INFO L158 Benchmark]: Toolchain (without parser) took 2414.10ms. Allocated memory is still 176.2MB. Free memory was 124.4MB in the beginning and 65.0MB in the end (delta: 59.4MB). Peak memory consumption was 60.0MB. Max. memory is 8.0GB. [2022-03-19 07:18:25,007 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 07:18:25,007 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.35ms. Allocated memory is still 176.2MB. Free memory was 124.4MB in the beginning and 119.2MB in the end (delta: 5.2MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-03-19 07:18:25,008 INFO L158 Benchmark]: Boogie Preprocessor took 34.51ms. Allocated memory is still 176.2MB. Free memory was 119.2MB in the beginning and 117.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 07:18:25,008 INFO L158 Benchmark]: RCFGBuilder took 230.21ms. Allocated memory is still 176.2MB. Free memory was 117.6MB in the beginning and 107.0MB in the end (delta: 10.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-19 07:18:25,008 INFO L158 Benchmark]: TraceAbstraction took 1878.27ms. Allocated memory is still 176.2MB. Free memory was 106.4MB in the beginning and 65.0MB in the end (delta: 41.4MB). Peak memory consumption was 42.2MB. Max. memory is 8.0GB. [2022-03-19 07:18:25,009 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 176.2MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 267.35ms. Allocated memory is still 176.2MB. Free memory was 124.4MB in the beginning and 119.2MB in the end (delta: 5.2MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.51ms. Allocated memory is still 176.2MB. Free memory was 119.2MB in the beginning and 117.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 230.21ms. Allocated memory is still 176.2MB. Free memory was 117.6MB in the beginning and 107.0MB in the end (delta: 10.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 1878.27ms. Allocated memory is still 176.2MB. Free memory was 106.4MB in the beginning and 65.0MB in the end (delta: 41.4MB). Peak memory consumption was 42.2MB. 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: 21]: 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 80 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 106 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 35 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 71 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 49 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 19 PreInvPairs, 35 NumberOfFragments, 50 HoareAnnotationTreeSize, 19 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 19 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s 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: 13]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: a == 1 - ProcedureContractResult [Line: 7]: Procedure Contract for main Derived contract for procedure main: 1 RESULT: Ultimate proved your program to be correct! [2022-03-19 07:18:25,038 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...