/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-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:10:11,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:10:11,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:10:11,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:10:11,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:10:11,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:10:11,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:10:11,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:10:11,368 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:10:11,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:10:11,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:10:11,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:10:11,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:10:11,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:10:11,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:10:11,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:10:11,370 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:10:11,370 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:10:11,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:10:11,370 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:10:11,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:10:11,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:10:11,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:10:11,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:10:11,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:10:11,558 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:10:11,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2022-04-06 20:10:11,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de59fbb3/14e10856f3024ad1bf290aeab2e09271/FLAG15b224927 [2022-04-06 20:10:11,953 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:10:11,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i [2022-04-06 20:10:11,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de59fbb3/14e10856f3024ad1bf290aeab2e09271/FLAG15b224927 [2022-04-06 20:10:11,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de59fbb3/14e10856f3024ad1bf290aeab2e09271 [2022-04-06 20:10:11,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:10:11,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:10:11,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:10:11,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:10:11,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:10:11,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:10:11" (1/1) ... [2022-04-06 20:10:11,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a532c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:11, skipping insertion in model container [2022-04-06 20:10:11,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:10:11" (1/1) ... [2022-04-06 20:10:11,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:10:11,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:10:12,106 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-lit/hhk2008.i[895,908] [2022-04-06 20:10:12,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:10:12,126 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:10:12,135 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-lit/hhk2008.i[895,908] [2022-04-06 20:10:12,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:10:12,147 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:10:12,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12 WrapperNode [2022-04-06 20:10:12,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:10:12,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:10:12,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:10:12,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:10:12,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:10:12,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:10:12,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:10:12,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:10:12,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (1/1) ... [2022-04-06 20:10:12,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:10:12,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:12,200 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) [2022-04-06 20:10:12,201 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 [2022-04-06 20:10:12,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:10:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:10:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:10:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:10:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:10:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:10:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:10:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:10:12,272 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:10:12,273 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:10:12,356 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:10:12,360 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:10:12,360 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:10:12,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:10:12 BoogieIcfgContainer [2022-04-06 20:10:12,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:10:12,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:10:12,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:10:12,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:10:12,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:10:11" (1/3) ... [2022-04-06 20:10:12,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267813a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:10:12, skipping insertion in model container [2022-04-06 20:10:12,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:12" (2/3) ... [2022-04-06 20:10:12,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267813a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:10:12, skipping insertion in model container [2022-04-06 20:10:12,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:10:12" (3/3) ... [2022-04-06 20:10:12,377 INFO L111 eAbstractionObserver]: Analyzing ICFG hhk2008.i [2022-04-06 20:10:12,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:10:12,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:10:12,411 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:10:12,416 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 [2022-04-06 20:10:12,417 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:10:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:10:12,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:12,432 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:12,432 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash 499112448, now seen corresponding path program 1 times [2022-04-06 20:10:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:12,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319054791] [2022-04-06 20:10:12,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:10:12,449 INFO L85 PathProgramCache]: Analyzing trace with hash 499112448, now seen corresponding path program 2 times [2022-04-06 20:10:12,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462675549] [2022-04-06 20:10:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:12,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462675549] [2022-04-06 20:10:12,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462675549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:12,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:12,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:10:12,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:12,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319054791] [2022-04-06 20:10:12,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319054791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:12,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:12,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:10:12,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73943288] [2022-04-06 20:10:12,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:12,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:10:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:10:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:10:12,596 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:12,649 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-04-06 20:10:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:10:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 20:10:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:12,659 INFO L225 Difference]: With dead ends: 33 [2022-04-06 20:10:12,659 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 20:10:12,661 INFO L912 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 [2022-04-06 20:10:12,663 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:12,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:10:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 20:10:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 20:10:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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) [2022-04-06 20:10:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 20:10:12,692 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 13 [2022-04-06 20:10:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:12,692 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 20:10:12,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 20:10:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:10:12,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:12,694 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:12,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:10:12,695 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:12,698 INFO L85 PathProgramCache]: Analyzing trace with hash 495418364, now seen corresponding path program 1 times [2022-04-06 20:10:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:12,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99642530] [2022-04-06 20:10:12,701 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:10:12,702 INFO L85 PathProgramCache]: Analyzing trace with hash 495418364, now seen corresponding path program 2 times [2022-04-06 20:10:12,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:12,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133561540] [2022-04-06 20:10:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:12,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:12,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133561540] [2022-04-06 20:10:12,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133561540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:12,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:12,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:10:12,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:12,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99642530] [2022-04-06 20:10:12,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99642530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:12,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:12,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:10:12,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156421926] [2022-04-06 20:10:12,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:12,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:10:12,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:10:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:10:12,874 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:12,963 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-06 20:10:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:10:12,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 20:10:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:12,965 INFO L225 Difference]: With dead ends: 20 [2022-04-06 20:10:12,966 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 20:10:12,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:10:12,969 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:12,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:10:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 20:10:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 20:10:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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) [2022-04-06 20:10:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 20:10:12,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-04-06 20:10:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:12,980 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 20:10:12,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 20:10:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:10:12,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:12,983 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:12,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:10:12,983 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1787404818, now seen corresponding path program 1 times [2022-04-06 20:10:12,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [874070176] [2022-04-06 20:10:12,998 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:12,998 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1787404818, now seen corresponding path program 2 times [2022-04-06 20:10:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:12,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491200839] [2022-04-06 20:10:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:13,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491200839] [2022-04-06 20:10:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491200839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:13,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833513284] [2022-04-06 20:10:13,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:13,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:13,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:13,126 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) [2022-04-06 20:10:13,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:10:13,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:13,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:10:13,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:13,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:13,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833513284] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:13,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:13,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-04-06 20:10:13,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [874070176] [2022-04-06 20:10:13,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [874070176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:13,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:13,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:10:13,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79670283] [2022-04-06 20:10:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:13,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:10:13,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:10:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:10:13,459 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:13,548 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-04-06 20:10:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:10:13,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:10:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:13,549 INFO L225 Difference]: With dead ends: 15 [2022-04-06 20:10:13,549 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 20:10:13,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:10:13,550 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:13,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:10:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 20:10:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 20:10:13,551 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) [2022-04-06 20:10:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 20:10:13,551 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2022-04-06 20:10:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:13,551 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 20:10:13,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 20:10:13,552 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 20:10:13,554 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 20:10:13,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:13,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:13,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 20:10:13,811 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-04-06 20:10:13,811 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-04-06 20:10:13,811 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-04-06 20:10:13,811 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-04-06 20:10:13,811 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-04-06 20:10:13,811 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-04-06 20:10:13,811 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-04-06 20:10:13,812 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 35) the Hoare annotation is: (let ((.cse1 (+ main_~cnt~0 main_~res~0)) (.cse0 (+ main_~b~0 main_~a~0))) (and (< main_~res~0 (+ main_~b~0 main_~a~0 1)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 38) the Hoare annotation is: true [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-04-06 20:10:13,812 INFO L878 garLoopResultBuilder]: At program point L32-3(lines 32 35) the Hoare annotation is: (and (< main_~res~0 (+ main_~b~0 main_~a~0 1)) (<= (+ main_~b~0 main_~a~0) main_~res~0)) [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 24 38) the Hoare annotation is: true [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 24 38) the Hoare annotation is: true [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: true [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 20:10:13,812 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|)) [2022-04-06 20:10:13,812 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L885 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2022-04-06 20:10:13,813 INFO L878 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 20:10:13,813 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 20:10:13,813 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 20:10:13,815 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2] [2022-04-06 20:10:13,816 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 20:10:13,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:10:13 BoogieIcfgContainer [2022-04-06 20:10:13,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 20:10:13,825 INFO L158 Benchmark]: Toolchain (without parser) took 1857.95ms. Allocated memory was 198.2MB in the beginning and 238.0MB in the end (delta: 39.8MB). Free memory was 147.7MB in the beginning and 198.1MB in the end (delta: -50.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 20:10:13,825 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory was 163.9MB in the beginning and 163.7MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 20:10:13,826 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.74ms. Allocated memory was 198.2MB in the beginning and 238.0MB in the end (delta: 39.8MB). Free memory was 147.6MB in the beginning and 215.0MB in the end (delta: -67.4MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. [2022-04-06 20:10:13,826 INFO L158 Benchmark]: Boogie Preprocessor took 28.36ms. Allocated memory is still 238.0MB. Free memory was 215.0MB in the beginning and 213.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 20:10:13,826 INFO L158 Benchmark]: RCFGBuilder took 183.86ms. Allocated memory is still 238.0MB. Free memory was 213.4MB in the beginning and 203.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 20:10:13,826 INFO L158 Benchmark]: TraceAbstraction took 1453.31ms. Allocated memory is still 238.0MB. Free memory was 202.9MB in the beginning and 198.1MB in the end (delta: 4.8MB). Peak memory consumption was 5.9MB. Max. memory is 8.0GB. [2022-04-06 20:10:13,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory was 163.9MB in the beginning and 163.7MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 179.74ms. Allocated memory was 198.2MB in the beginning and 238.0MB in the end (delta: 39.8MB). Free memory was 147.6MB in the beginning and 215.0MB in the end (delta: -67.4MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.36ms. Allocated memory is still 238.0MB. Free memory was 215.0MB in the beginning and 213.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 183.86ms. Allocated memory is still 238.0MB. Free memory was 213.4MB in the beginning and 203.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1453.31ms. Allocated memory is still 238.0MB. Free memory was 202.9MB in the beginning and 198.1MB in the end (delta: 4.8MB). Peak memory consumption was 5.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 3, 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, 35 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 89 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 47 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 67 IncrementalHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 42 mSDtfsCounter, 67 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 33 PreInvPairs, 45 NumberOfFragments, 69 HoareAnnotationTreeSize, 33 FomulaSimplifications, 41 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 32 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: 32]: Loop Invariant Derived loop invariant: (res < b + a + 1 && b + a <= cnt + res) && cnt + res <= b + a - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-04-06 20:10:13,854 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...