/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-acceleration/functions_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:15:12,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:15:12,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:15:12,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:15:12,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:15:12,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:15:12,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:15:12,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:15:12,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:15:12,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:15:12,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:15:12,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:15:12,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:15:12,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:15:12,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:15:12,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:15:12,698 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:15:12,698 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:15:12,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:15:12,699 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:15:12,699 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:15:12,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:15:12,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:15:12,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:15:12,931 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:15:12,932 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:15:12,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-1.c [2022-03-18 00:15:12,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e386a71b7/c80188bb550b43db83ee18fcb17657ff/FLAGb30aa7a5f [2022-03-18 00:15:13,285 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:15:13,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c [2022-03-18 00:15:13,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e386a71b7/c80188bb550b43db83ee18fcb17657ff/FLAGb30aa7a5f [2022-03-18 00:15:13,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e386a71b7/c80188bb550b43db83ee18fcb17657ff [2022-03-18 00:15:13,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:15:13,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:15:13,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:15:13,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:15:13,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:15:13,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed9bd4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13, skipping insertion in model container [2022-03-18 00:15:13,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:15:13,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:15:13,897 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-acceleration/functions_1-1.c[325,338] [2022-03-18 00:15:13,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:15:13,913 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:15:13,922 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-acceleration/functions_1-1.c[325,338] [2022-03-18 00:15:13,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:15:13,935 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:15:13,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13 WrapperNode [2022-03-18 00:15:13,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:15:13,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:15:13,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:15:13,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:15:13,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:15:13,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:15:13,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:15:13,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:15:13,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (1/1) ... [2022-03-18 00:15:13,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:15:13,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:14,000 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) [2022-03-18 00:15:14,006 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 [2022-03-18 00:15:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:15:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:15:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:15:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:15:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-03-18 00:15:14,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:15:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:15:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:15:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:15:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:15:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:15:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:15:14,086 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:15:14,088 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:15:14,194 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:15:14,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:15:14,198 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:15:14,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:15:14 BoogieIcfgContainer [2022-03-18 00:15:14,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:15:14,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:15:14,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:15:14,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:15:14,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:15:13" (1/3) ... [2022-03-18 00:15:14,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34797a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:15:14, skipping insertion in model container [2022-03-18 00:15:14,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:13" (2/3) ... [2022-03-18 00:15:14,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34797a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:15:14, skipping insertion in model container [2022-03-18 00:15:14,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:15:14" (3/3) ... [2022-03-18 00:15:14,205 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-1.c [2022-03-18 00:15:14,208 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:15:14,209 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:15:14,239 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:15:14,243 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 [2022-03-18 00:15:14,244 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:15:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:15:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:15:14,274 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:14,274 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:14,275 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:14,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 1 times [2022-03-18 00:15:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566844990] [2022-03-18 00:15:14,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:15:14,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 2 times [2022-03-18 00:15:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:14,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319672285] [2022-03-18 00:15:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:14,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:14,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:14,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319672285] [2022-03-18 00:15:14,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319672285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:15:14,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:14,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566844990] [2022-03-18 00:15:14,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566844990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:15:14,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273265219] [2022-03-18 00:15:14,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:14,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:15:14,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:15:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:15:14,505 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-18 00:15:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:14,555 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-18 00:15:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:15:14,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-18 00:15:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:14,567 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:15:14,567 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:15:14,570 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 [2022-03-18 00:15:14,577 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:14,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:15:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 00:15:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-18 00:15:14,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2022-03-18 00:15:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:14,609 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-18 00:15:14,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-18 00:15:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-18 00:15:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:15:14,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:14,610 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:14,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:15:14,611 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 1 times [2022-03-18 00:15:14,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836203756] [2022-03-18 00:15:14,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:15:14,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 2 times [2022-03-18 00:15:14,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:14,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223190747] [2022-03-18 00:15:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:14,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:14,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223190747] [2022-03-18 00:15:14,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223190747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:14,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836203756] [2022-03-18 00:15:14,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836203756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629941135] [2022-03-18 00:15:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:14,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:15:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:15:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:15:14,746 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 00:15:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:14,795 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-03-18 00:15:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:15:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-18 00:15:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:14,797 INFO L225 Difference]: With dead ends: 25 [2022-03-18 00:15:14,797 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 00:15:14,797 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:15:14,800 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:14,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 00:15:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-18 00:15:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-18 00:15:14,819 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-03-18 00:15:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:14,819 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-18 00:15:14,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 00:15:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-18 00:15:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:15:14,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:14,820 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:14,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:15:14,820 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 1 times [2022-03-18 00:15:14,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744780667] [2022-03-18 00:15:14,896 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1236910030, now seen corresponding path program 1 times [2022-03-18 00:15:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:14,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107710217] [2022-03-18 00:15:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:15,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:15,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107710217] [2022-03-18 00:15:15,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107710217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:15,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:15,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:15:15,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:15,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744780667] [2022-03-18 00:15:15,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744780667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:15,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:15,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:15:15,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102391083] [2022-03-18 00:15:15,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:15,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:15:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:15:15,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:15:15,319 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:15,640 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-03-18 00:15:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:15:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-18 00:15:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:15,641 INFO L225 Difference]: With dead ends: 31 [2022-03-18 00:15:15,641 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 00:15:15,642 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:15:15,642 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:15,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 00:15:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-03-18 00:15:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:15:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-18 00:15:15,652 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2022-03-18 00:15:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:15,653 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-18 00:15:15,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-18 00:15:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:15:15,653 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:15,653 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:15,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:15:15,654 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:15,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 2 times [2022-03-18 00:15:15,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [782015363] [2022-03-18 00:15:15,724 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1296015374, now seen corresponding path program 1 times [2022-03-18 00:15:15,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:15,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635130445] [2022-03-18 00:15:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:15,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635130445] [2022-03-18 00:15:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635130445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:15,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:15,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:15:16,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:16,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [782015363] [2022-03-18 00:15:16,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [782015363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:16,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:16,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:15:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007520077] [2022-03-18 00:15:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:16,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:15:16,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:15:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:15:16,568 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 17 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 11 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:15:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:17,613 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-03-18 00:15:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:15:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 11 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2022-03-18 00:15:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:17,613 INFO L225 Difference]: With dead ends: 26 [2022-03-18 00:15:17,614 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 00:15:17,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:15:17,615 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:17,615 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:15:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 00:15:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 00:15:17,616 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) [2022-03-18 00:15:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 00:15:17,616 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2022-03-18 00:15:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:17,616 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 00:15:17,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 11 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:15:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 00:15:17,616 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 00:15:17,619 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 00:15:17,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 00:15:17,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 00:15:18,311 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-18 00:15:18,311 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-18 00:15:18,311 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-18 00:15:18,312 INFO L878 garLoopResultBuilder]: At program point fEXIT(lines 12 14) the Hoare annotation is: (let ((.cse0 (and (= |f_#in~z| f_~z) (= |f_#res| (+ 2 f_~z)))) (.cse3 (* (- 1) |f_#in~z|)) (.cse2 (not (= (mod |f_#in~z| 2) 0))) (.cse1 (not (< (mod |f_#in~z| 4294967296) 268435455)))) (and (or .cse0 .cse1 (and (not (= |f_#in~z| 2)) (or (not (< (mod (+ 4294967292 |f_#in~z|) 4294967296) 268435455)) .cse2 (not (<= 0 (div (+ 2 .cse3) (- 2))))))) (or .cse0 (and (not (= |f_#in~z| 0)) (or (not (< (mod (+ |f_#in~z| 4294967294) 4294967296) 268435455)) (not (<= 0 (div .cse3 (- 2)))) .cse2 (not (= (* 2 |main_#t~ret4|) 0)))) .cse1))) [2022-03-18 00:15:18,312 INFO L885 garLoopResultBuilder]: At program point fENTRY(lines 12 14) the Hoare annotation is: true [2022-03-18 00:15:18,312 INFO L878 garLoopResultBuilder]: At program point fFINAL(lines 12 14) the Hoare annotation is: (let ((.cse0 (and (= |f_#in~z| f_~z) (= |f_#res| (+ 2 f_~z)))) (.cse3 (* (- 1) |f_#in~z|)) (.cse2 (not (= (mod |f_#in~z| 2) 0))) (.cse1 (not (< (mod |f_#in~z| 4294967296) 268435455)))) (and (or .cse0 .cse1 (and (not (= |f_#in~z| 2)) (or (not (< (mod (+ 4294967292 |f_#in~z|) 4294967296) 268435455)) .cse2 (not (<= 0 (div (+ 2 .cse3) (- 2))))))) (or .cse0 (and (not (= |f_#in~z| 0)) (or (not (< (mod (+ |f_#in~z| 4294967294) 4294967296) 268435455)) (not (<= 0 (div .cse3 (- 2)))) .cse2 (not (= (* 2 |main_#t~ret4|) 0)))) .cse1))) [2022-03-18 00:15:18,312 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 16 24) the Hoare annotation is: true [2022-03-18 00:15:18,312 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 16 24) the Hoare annotation is: true [2022-03-18 00:15:18,312 INFO L878 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (< (mod main_~x~0 4294967296) 268435455)) (.cse1 (* (- 1) main_~x~0)) (.cse2 (= (mod main_~x~0 2) 0))) (or (and .cse0 (or (and (< (mod (+ 4294967292 main_~x~0) 4294967296) 268435455) (<= 0 (div (+ 2 .cse1) (- 2))) .cse2) (= main_~x~0 2))) (and .cse0 (or (= main_~x~0 0) (and (<= 0 (div .cse1 (- 2))) (= (* 2 |main_#t~ret4|) 0) (< (mod (+ main_~x~0 4294967294) 4294967296) 268435455) .cse2))))) [2022-03-18 00:15:18,312 INFO L878 garLoopResultBuilder]: At program point L20-1(line 20) the Hoare annotation is: (and (or (= main_~x~0 0) (and (<= 0 (div (* (- 1) main_~x~0) (- 2))) (< (mod (+ main_~x~0 4294967294) 4294967296) 268435455) (= (mod main_~x~0 2) 0))) (= (+ main_~x~0 2) |main_#t~ret4|) (< (mod main_~x~0 4294967296) 268435455)) [2022-03-18 00:15:18,313 INFO L878 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (or (= main_~x~0 0) (and (< (mod (+ main_~x~0 4294967294) 4294967296) 268435455) (or (and (< (mod (+ 4294967292 main_~x~0) 4294967296) 268435455) (<= 0 (div (+ 2 (* (- 1) main_~x~0)) (- 2))) (= (mod main_~x~0 2) 0)) (= main_~x~0 2)))) [2022-03-18 00:15:18,313 INFO L878 garLoopResultBuilder]: At program point L19-3(lines 19 21) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967294) 4294967296) 268435455) (or (and (< (mod (+ 4294967292 main_~x~0) 4294967296) 268435455) (<= 0 (div (+ 2 (* (- 1) main_~x~0)) (- 2))) (= (mod main_~x~0 2) 0)) (= main_~x~0 2))) [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 16 24) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2022-03-18 00:15:18,313 INFO L878 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 00:15:18,313 INFO L878 garLoopResultBuilder]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-03-18 00:15:18,314 INFO L885 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2022-03-18 00:15:18,314 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 00:15:18,316 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2022-03-18 00:15:18,317 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 00:15:18,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:15:18 BoogieIcfgContainer [2022-03-18 00:15:18,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 00:15:18,328 INFO L158 Benchmark]: Toolchain (without parser) took 4607.77ms. Allocated memory was 165.7MB in the beginning and 237.0MB in the end (delta: 71.3MB). Free memory was 117.3MB in the beginning and 97.2MB in the end (delta: 20.1MB). Peak memory consumption was 90.9MB. Max. memory is 8.0GB. [2022-03-18 00:15:18,328 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 165.7MB. Free memory was 133.2MB in the beginning and 133.0MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 00:15:18,328 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.40ms. Allocated memory is still 165.7MB. Free memory was 117.1MB in the beginning and 142.1MB in the end (delta: -25.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 00:15:18,329 INFO L158 Benchmark]: Boogie Preprocessor took 29.14ms. Allocated memory is still 165.7MB. Free memory was 142.1MB in the beginning and 141.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 00:15:18,329 INFO L158 Benchmark]: RCFGBuilder took 233.67ms. Allocated memory is still 165.7MB. Free memory was 140.5MB in the beginning and 131.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 00:15:18,329 INFO L158 Benchmark]: TraceAbstraction took 4126.81ms. Allocated memory was 165.7MB in the beginning and 237.0MB in the end (delta: 71.3MB). Free memory was 130.5MB in the beginning and 97.2MB in the end (delta: 33.3MB). Peak memory consumption was 105.2MB. Max. memory is 8.0GB. [2022-03-18 00:15:18,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 165.7MB. Free memory was 133.2MB in the beginning and 133.0MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.40ms. Allocated memory is still 165.7MB. Free memory was 117.1MB in the beginning and 142.1MB in the end (delta: -25.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.14ms. Allocated memory is still 165.7MB. Free memory was 142.1MB in the beginning and 141.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 233.67ms. Allocated memory is still 165.7MB. Free memory was 140.5MB in the beginning and 131.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 4126.81ms. Allocated memory was 165.7MB in the beginning and 237.0MB in the end (delta: 71.3MB). Free memory was 130.5MB in the beginning and 97.2MB in the end (delta: 33.3MB). Peak memory consumption was 105.2MB. 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: 7]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.1s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 130 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 69 mSDsCounter, 43 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 278 IncrementalHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 43 mSolverCounterUnsat, 61 mSDtfsCounter, 278 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, InterpolantAutomatonStates: 34, 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 47 PreInvPairs, 65 NumberOfFragments, 403 HoareAnnotationTreeSize, 47 FomulaSimplifications, 42 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 464 FormulaSimplificationTreeSizeReductionInter, 0.7s 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: 19]: Loop Invariant Derived loop invariant: x == 0 || ((x + 4294967294) % 4294967296 < 268435455 && ((((4294967292 + x) % 4294967296 < 268435455 && 0 <= (2 + -1 * x) / -2) && x % 2 == 0) || x == 2)) - ProcedureContractResult [Line: 12]: Procedure Contract for f Derived contract for procedure f: (((\old(z) == z && \result == 2 + z) || !(\old(z) % 4294967296 < 268435455)) || (!(\old(z) == 2) && ((!((4294967292 + \old(z)) % 4294967296 < 268435455) || !(\old(z) % 2 == 0)) || !(0 <= (2 + -1 * \old(z)) / -2)))) && (((\old(z) == z && \result == 2 + z) || (!(\old(z) == 0) && (((!((\old(z) + 4294967294) % 4294967296 < 268435455) || !(0 <= -1 * \old(z) / -2)) || !(\old(z) % 2 == 0)) || !(2 * aux-f(x)-aux == 0)))) || !(\old(z) % 4294967296 < 268435455)) - ProcedureContractResult [Line: 16]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-03-18 00:15:18,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...