/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:00:08,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:00:08,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:00:08,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:00:08,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:00:08,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:00:08,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:00:08,738 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 00:00:08,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:00:08,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:00:08,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:00:08,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:00:08,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:00:08,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:00:08,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:00:08,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:00:08,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:00:08,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:00:08,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:00:08,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:00:08,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:00:08,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:00:08,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:00:08,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:00:08,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:00:08,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:00:08,762 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:00:08,762 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:00:08,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:00:08,763 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:00:08,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:00:09,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:00:09,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:00:09,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:00:09,048 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:00:09,049 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:00:09,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-03-18 00:00:09,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4beb4c8/49021706307b4e1fa57fb0fb9af9dfb5/FLAGd57f9c173 [2022-03-18 00:00:09,509 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:00:09,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-03-18 00:00:09,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4beb4c8/49021706307b4e1fa57fb0fb9af9dfb5/FLAGd57f9c173 [2022-03-18 00:00:09,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4beb4c8/49021706307b4e1fa57fb0fb9af9dfb5 [2022-03-18 00:00:09,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:00:09,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:00:09,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:00:09,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:00:09,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:00:09,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cbd3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:09, skipping insertion in model container [2022-03-18 00:00:09,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:00:09" (1/1) ... [2022-03-18 00:00:09,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:00:09,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:00:10,116 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2022-03-18 00:00:10,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:00:10,178 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:00:10,188 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2022-03-18 00:00:10,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:00:10,205 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:00:10,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10 WrapperNode [2022-03-18 00:00:10,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:00:10,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:00:10,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:00:10,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:00:10,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:00:10,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:00:10,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:00:10,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:00:10,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (1/1) ... [2022-03-18 00:00:10,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:00:10,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:10,286 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 00:00:10,298 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 00:00:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:00:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:00:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:00:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 00:00:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:00:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 00:00:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:00:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:00:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:00:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:00:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:00:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:00:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:00:10,400 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:00:10,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:00:10,517 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:00:10,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:00:10,523 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:00:10,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:00:10 BoogieIcfgContainer [2022-03-18 00:00:10,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:00:10,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:00:10,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:00:10,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:00:10,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:00:09" (1/3) ... [2022-03-18 00:00:10,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb29a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:00:10, skipping insertion in model container [2022-03-18 00:00:10,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:10" (2/3) ... [2022-03-18 00:00:10,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb29a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:00:10, skipping insertion in model container [2022-03-18 00:00:10,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:00:10" (3/3) ... [2022-03-18 00:00:10,538 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2022-03-18 00:00:10,542 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:00:10,543 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:00:10,596 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:00:10,609 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 00:00:10,610 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:00:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:00:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 00:00:10,630 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:10,631 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:10,632 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2022-03-18 00:00:10,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:10,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1493344992] [2022-03-18 00:00:10,666 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:00:10,666 INFO L85 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 2 times [2022-03-18 00:00:10,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:10,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330920432] [2022-03-18 00:00:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:10,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:10,827 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 00:00:10,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:10,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330920432] [2022-03-18 00:00:10,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330920432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:10,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:10,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:00:10,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:10,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1493344992] [2022-03-18 00:00:10,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1493344992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:10,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:10,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:00:10,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402374066] [2022-03-18 00:00:10,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:10,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:00:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:00:10,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:00:10,865 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 00:00:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:10,937 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-03-18 00:00:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:00:10,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-03-18 00:00:10,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:10,947 INFO L225 Difference]: With dead ends: 41 [2022-03-18 00:00:10,947 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 00:00:10,950 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 00:00:10,965 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:10,966 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:00:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 00:00:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 00:00:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:00:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-18 00:00:10,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-03-18 00:00:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:10,999 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-18 00:00:10,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 00:00:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-18 00:00:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 00:00:11,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:11,001 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:11,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:00:11,001 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2022-03-18 00:00:11,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713977033] [2022-03-18 00:00:11,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:00:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 2 times [2022-03-18 00:00:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:11,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872952064] [2022-03-18 00:00:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:11,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,121 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 00:00:11,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872952064] [2022-03-18 00:00:11,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872952064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:00:11,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713977033] [2022-03-18 00:00:11,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713977033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:00:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140182110] [2022-03-18 00:00:11,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:11,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:00:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:00:11,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:00:11,125 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 00:00:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:11,238 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-03-18 00:00:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:00:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-03-18 00:00:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:11,242 INFO L225 Difference]: With dead ends: 33 [2022-03-18 00:00:11,243 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 00:00:11,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:00:11,249 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:11,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 00:00:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-03-18 00:00:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:00:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-18 00:00:11,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2022-03-18 00:00:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:11,277 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-18 00:00:11,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 00:00:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-18 00:00:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 00:00:11,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:11,280 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:11,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:00:11,281 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:11,283 INFO L85 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2022-03-18 00:00:11,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006452022] [2022-03-18 00:00:11,291 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:00:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 2 times [2022-03-18 00:00:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:11,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266926472] [2022-03-18 00:00:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:00:11,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:11,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266926472] [2022-03-18 00:00:11,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266926472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:00:11,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:11,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006452022] [2022-03-18 00:00:11,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006452022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:00:11,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577987043] [2022-03-18 00:00:11,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:11,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:00:11,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:00:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:00:11,452 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 00:00:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:11,617 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-03-18 00:00:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:00:11,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 12 [2022-03-18 00:00:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:11,621 INFO L225 Difference]: With dead ends: 30 [2022-03-18 00:00:11,621 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 00:00:11,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:00:11,624 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:11,624 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 00:00:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-03-18 00:00:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:00:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-18 00:00:11,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2022-03-18 00:00:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:11,632 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-18 00:00:11,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 00:00:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-18 00:00:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:00:11,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:11,633 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:11,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:00:11,634 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2022-03-18 00:00:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528554157] [2022-03-18 00:00:11,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:00:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 2 times [2022-03-18 00:00:11,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:11,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744285723] [2022-03-18 00:00:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:11,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:00:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 00:00:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:00:11,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:11,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744285723] [2022-03-18 00:00:11,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744285723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:00:11,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:11,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528554157] [2022-03-18 00:00:11,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528554157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:11,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:11,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:00:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849302894] [2022-03-18 00:00:11,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:11,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:00:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:00:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:00:11,809 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:11,974 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-03-18 00:00:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:00:11,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-03-18 00:00:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:11,976 INFO L225 Difference]: With dead ends: 38 [2022-03-18 00:00:11,976 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 00:00:11,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:00:11,979 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:11,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 43 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 00:00:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-03-18 00:00:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:00:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-18 00:00:12,006 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2022-03-18 00:00:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:12,006 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-18 00:00:12,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-18 00:00:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 00:00:12,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:12,009 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:12,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 00:00:12,010 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2022-03-18 00:00:12,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:12,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1712473212] [2022-03-18 00:01:21,745 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:01:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 174074482, now seen corresponding path program 1 times [2022-03-18 00:01:21,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:01:21,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727449820] [2022-03-18 00:01:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:01:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:01:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:21,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:01:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:21,800 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 00:01:21,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:01:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727449820] [2022-03-18 00:01:21,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727449820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:01:21,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:01:21,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:01:22,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:01:22,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1712473212] [2022-03-18 00:01:22,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1712473212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:01:22,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:01:22,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:01:22,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100179084] [2022-03-18 00:01:22,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:01:22,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:01:22,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:01:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:01:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:01:22,147 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 00:01:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:01:22,495 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-03-18 00:01:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:01:22,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 26 [2022-03-18 00:01:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:01:22,496 INFO L225 Difference]: With dead ends: 45 [2022-03-18 00:01:22,496 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 00:01:22,497 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:01:22,498 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:01:22,498 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:01:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 00:01:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-03-18 00:01:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:01:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-18 00:01:22,504 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-03-18 00:01:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:01:22,504 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-18 00:01:22,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 00:01:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-18 00:01:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 00:01:22,505 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:01:22,505 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:01:22,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 00:01:22,506 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:01:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:01:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1863237124, now seen corresponding path program 1 times [2022-03-18 00:01:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:01:22,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055553327] [2022-03-18 00:02:37,050 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:02:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash 233060662, now seen corresponding path program 1 times [2022-03-18 00:02:37,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:02:37,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512974553] [2022-03-18 00:02:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:02:37,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:02:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:02:37,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:02:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:02:37,118 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 00:02:37,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:02:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512974553] [2022-03-18 00:02:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512974553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:02:37,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:02:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:02:37,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:02:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055553327] [2022-03-18 00:02:37,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055553327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:02:37,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:02:37,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:02:37,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925913867] [2022-03-18 00:02:37,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:02:37,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:02:37,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:02:37,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:02:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:02:37,386 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 00:02:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:02:37,539 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-18 00:02:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:02:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 26 [2022-03-18 00:02:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:02:37,539 INFO L225 Difference]: With dead ends: 30 [2022-03-18 00:02:37,539 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 00:02:37,540 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:02:37,540 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:02:37,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 53 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-03-18 00:02:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 00:02:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 00:02:37,541 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 00:02:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 00:02:37,541 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-03-18 00:02:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:02:37,541 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 00:02:37,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 00:02:37,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 00:02:37,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 00:02:37,543 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 00:02:37,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 00:02:37,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 00:02:37,950 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-18 00:02:37,950 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-18 00:02:37,950 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-18 00:02:37,950 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2022-03-18 00:02:37,950 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-18 00:02:37,950 INFO L882 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-03-18 00:02:37,950 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-03-18 00:02:37,950 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 32) the Hoare annotation is: true [2022-03-18 00:02:37,950 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (not (= main_~y~0 0)) (<= main_~y~0 2147483647) (= main_~y~0 main_~x~0) (<= 0 (+ main_~y~0 2147483648))) [2022-03-18 00:02:37,951 INFO L878 garLoopResultBuilder]: At program point L29-1(lines 22 30) the Hoare annotation is: (and (not (= main_~y~0 0)) (<= main_~y~0 2147483647) (= main_~y~0 main_~x~0) (<= 0 (+ main_~y~0 2147483648))) [2022-03-18 00:02:37,951 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (= main_~x~0 0) (<= main_~y~0 2147483647) (<= 0 (+ main_~y~0 2147483648))) [2022-03-18 00:02:37,951 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (= main_~x~0 0) (<= main_~y~0 2147483647) (<= 0 (+ main_~y~0 2147483648))) [2022-03-18 00:02:37,951 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 18 32) the Hoare annotation is: true [2022-03-18 00:02:37,951 INFO L878 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: (and (= main_~x~0 0) (<= main_~y~0 2147483647) (<= 0 (+ main_~y~0 2147483648))) [2022-03-18 00:02:37,951 INFO L878 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (= main_~x~0 0) (= main_~y~0 0)) [2022-03-18 00:02:37,951 INFO L878 garLoopResultBuilder]: At program point L22-2(lines 22 30) the Hoare annotation is: (or (and (exists ((v_main_~x~0_34 Int) (v___VERIFIER_assert_~cond_BEFORE_RETURN_4 Int) (v_main_~y~0_BEFORE_RETURN_3 Int)) (let ((.cse1 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_4 1)) (.cse2 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_4 0))) (and (not (= v_main_~y~0_BEFORE_RETURN_3 0)) (<= v_main_~y~0_BEFORE_RETURN_3 2147483647) (let ((.cse0 (= v_main_~x~0_34 0))) (or (and (not .cse0) .cse1) (and .cse0 .cse2))) (<= 0 (+ v_main_~y~0_BEFORE_RETURN_3 2147483648)) (< v_main_~y~0_BEFORE_RETURN_3 (+ v_main_~x~0_34 1)) (let ((.cse3 (= main_~x~0 0))) (or (and .cse1 (not .cse3)) (and .cse3 .cse2))) (<= v_main_~x~0_34 v_main_~y~0_BEFORE_RETURN_3)))) (<= main_~y~0 2147483647) (= main_~y~0 main_~x~0) (<= 0 (+ main_~y~0 2147483648))) (and (< main_~i~0 main_~n~0) (= main_~i~0 0) (= 0 (+ main_~y~0 main_~x~0)) (= main_~y~0 0))) [2022-03-18 00:02:37,951 INFO L878 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (<= main_~y~0 2147483647) (not (< main_~i~0 main_~n~0)) (= main_~y~0 main_~x~0) (<= 0 (+ main_~y~0 2147483648)) (not (= main_~x~0 0))) [2022-03-18 00:02:37,951 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 18 32) the Hoare annotation is: true [2022-03-18 00:02:37,951 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 00:02:37,951 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 00:02:37,952 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 00:02:37,952 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 00:02:37,952 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 00:02:37,952 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 00:02:37,952 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 00:02:37,952 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2022-03-18 00:02:37,952 INFO L878 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: (and (or (< main_~i~0 main_~n~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (= |__VERIFIER_assert_#in~cond| 0)) [2022-03-18 00:02:37,952 INFO L878 garLoopResultBuilder]: At program point L10(lines 10 12) the Hoare annotation is: (let ((.cse0 (= |__VERIFIER_assert_#in~cond| 0)) (.cse3 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (= main_~y~0 0))) (and (or (not .cse0) (< main_~i~0 main_~n~0) .cse1) (or .cse0 (not (= __VERIFIER_assert_~cond 0))) (or (not .cse2) .cse3 .cse1 (not (<= 1 main_~n~0)) (not (= main_~i~0 0))) (or (not (<= main_~y~0 2147483647)) .cse3 .cse1 .cse2 (not (<= 0 (+ main_~y~0 2147483648)))))) [2022-03-18 00:02:37,952 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 14) the Hoare annotation is: (let ((.cse1 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse2 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse0 (= main_~y~0 0))) (and (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not .cse0) .cse1 .cse2 (not (<= 1 main_~n~0)) (not (= main_~i~0 0))) (or (not (<= main_~y~0 2147483647)) .cse1 .cse2 .cse0 (not (<= 0 (+ main_~y~0 2147483648)))))) [2022-03-18 00:02:37,952 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 14) the Hoare annotation is: (let ((.cse1 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse2 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse0 (= main_~y~0 0))) (and (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not .cse0) .cse1 .cse2 (not (<= 1 main_~n~0)) (not (= main_~i~0 0))) (or (not (<= main_~y~0 2147483647)) .cse1 .cse2 .cse0 (not (<= 0 (+ main_~y~0 2147483648)))))) [2022-03-18 00:02:37,952 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) the Hoare annotation is: (and (< main_~i~0 main_~n~0) (= |__VERIFIER_assert_#in~cond| 0)) [2022-03-18 00:02:37,955 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 00:02:37,956 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 00:02:37,960 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,961 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,961 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,961 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,961 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,961 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,961 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,961 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,962 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,962 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,962 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,962 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,962 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,966 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,968 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,968 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:02:37 BoogieIcfgContainer [2022-03-18 00:02:37,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 00:02:37,969 INFO L158 Benchmark]: Toolchain (without parser) took 148043.24ms. Allocated memory was 172.0MB in the beginning and 265.3MB in the end (delta: 93.3MB). Free memory was 117.1MB in the beginning and 174.7MB in the end (delta: -57.6MB). Peak memory consumption was 37.2MB. Max. memory is 8.0GB. [2022-03-18 00:02:37,970 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 172.0MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 00:02:37,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.65ms. Allocated memory was 172.0MB in the beginning and 265.3MB in the end (delta: 93.3MB). Free memory was 116.9MB in the beginning and 238.1MB in the end (delta: -121.2MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-03-18 00:02:37,970 INFO L158 Benchmark]: Boogie Preprocessor took 24.04ms. Allocated memory is still 265.3MB. Free memory was 238.1MB in the beginning and 237.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 00:02:37,970 INFO L158 Benchmark]: RCFGBuilder took 292.52ms. Allocated memory is still 265.3MB. Free memory was 237.0MB in the beginning and 225.0MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 00:02:37,970 INFO L158 Benchmark]: TraceAbstraction took 147443.25ms. Allocated memory is still 265.3MB. Free memory was 224.5MB in the beginning and 174.7MB in the end (delta: 49.8MB). Peak memory consumption was 50.8MB. Max. memory is 8.0GB. [2022-03-18 00:02:37,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 172.0MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 273.65ms. Allocated memory was 172.0MB in the beginning and 265.3MB in the end (delta: 93.3MB). Free memory was 116.9MB in the beginning and 238.1MB in the end (delta: -121.2MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.04ms. Allocated memory is still 265.3MB. Free memory was 238.1MB in the beginning and 237.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 292.52ms. Allocated memory is still 265.3MB. Free memory was 237.0MB in the beginning and 225.0MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 147443.25ms. Allocated memory is still 265.3MB. Free memory was 224.5MB in the beginning and 174.7MB in the end (delta: 49.8MB). Peak memory consumption was 50.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] * 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: 11]: 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, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 147.4s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 159 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 149 mSDsluCounter, 251 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 45 IncrementalHoareTripleChecker+Unchecked, 146 mSDsCounter, 90 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 470 IncrementalHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 90 mSolverCounterUnsat, 105 mSDtfsCounter, 470 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 66 PreInvPairs, 92 NumberOfFragments, 373 HoareAnnotationTreeSize, 66 FomulaSimplifications, 208 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 1222 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant [2022-03-18 00:02:37,975 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,976 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,977 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,978 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v___VERIFIER_assert_~cond_BEFORE_RETURN_4,QUANTIFIED] [2022-03-18 00:02:37,978 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_34,QUANTIFIED] [2022-03-18 00:02:37,978 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_BEFORE_RETURN_3,QUANTIFIED] Derived loop invariant: ((((\exists v_main_~x~0_34 : int, v___VERIFIER_assert_~cond_BEFORE_RETURN_4 : int, v_main_~y~0_BEFORE_RETURN_3 : int :: (((((!(v_main_~y~0_BEFORE_RETURN_3 == 0) && v_main_~y~0_BEFORE_RETURN_3 <= 2147483647) && ((!(v_main_~x~0_34 == 0) && v___VERIFIER_assert_~cond_BEFORE_RETURN_4 == 1) || (v_main_~x~0_34 == 0 && v___VERIFIER_assert_~cond_BEFORE_RETURN_4 == 0))) && 0 <= v_main_~y~0_BEFORE_RETURN_3 + 2147483648) && v_main_~y~0_BEFORE_RETURN_3 < v_main_~x~0_34 + 1) && ((v___VERIFIER_assert_~cond_BEFORE_RETURN_4 == 1 && !(x == 0)) || (x == 0 && v___VERIFIER_assert_~cond_BEFORE_RETURN_4 == 0))) && v_main_~x~0_34 <= v_main_~y~0_BEFORE_RETURN_3) && y <= 2147483647) && y == x) && 0 <= y + 2147483648) || (((i < n && i == 0) && 0 == y + x) && y == 0) - ProcedureContractResult [Line: 18]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: ((\old(cond) == 0 || !(cond == 0)) && ((((!(y == 0) || !(\old(cond) == 1)) || \old(cond) == cond) || !(1 <= n)) || !(i == 0))) && ((((!(y <= 2147483647) || !(\old(cond) == 1)) || \old(cond) == cond) || y == 0) || !(0 <= y + 2147483648)) RESULT: Ultimate proved your program to be correct! [2022-03-18 00:02:38,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...