/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:31:59,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:31:59,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:31:59,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:31:59,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:31:59,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:31:59,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:31:59,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:31:59,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:31:59,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:31:59,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:31:59,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:31:59,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:31:59,983 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:31:59,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:31:59,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:31:59,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:31:59,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:31:59,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:31:59,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:31:59,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:31:59,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:31:59,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:31:59,984 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:31:59,984 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:32:00,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:32:00,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:32:00,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:32:00,179 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:32:00,183 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:32:00,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2022-02-15 01:32:00,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a74c8a3c/267d4245b61847e482e33689473694ac/FLAG677af4471 [2022-02-15 01:32:00,535 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:32:00,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2022-02-15 01:32:00,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a74c8a3c/267d4245b61847e482e33689473694ac/FLAG677af4471 [2022-02-15 01:32:00,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a74c8a3c/267d4245b61847e482e33689473694ac [2022-02-15 01:32:00,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:32:00,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:32:00,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:32:00,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:32:00,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:32:00,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:32:00" (1/1) ... [2022-02-15 01:32:00,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592e29e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:00, skipping insertion in model container [2022-02-15 01:32:00,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:32:00" (1/1) ... [2022-02-15 01:32:00,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:32:00,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:32:01,112 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i[893,906] [2022-02-15 01:32:01,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:32:01,126 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:32:01,133 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i[893,906] [2022-02-15 01:32:01,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:32:01,143 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:32:01,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01 WrapperNode [2022-02-15 01:32:01,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:32:01,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:32:01,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:32:01,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:32:01,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:32:01,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:32:01,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:32:01,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:32:01,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (1/1) ... [2022-02-15 01:32:01,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:32:01,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:32:01,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:32:01,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:32:01,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:32:01,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:32:01,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:32:01,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:32:01,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:32:01,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:32:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:32:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:32:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:32:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:32:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:32:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:32:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:32:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:32:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:32:01,281 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:32:01,282 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:32:01,366 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:32:01,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:32:01,371 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 01:32:01,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:32:01 BoogieIcfgContainer [2022-02-15 01:32:01,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:32:01,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:32:01,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:32:01,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:32:01,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:32:00" (1/3) ... [2022-02-15 01:32:01,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c444584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:32:01, skipping insertion in model container [2022-02-15 01:32:01,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:32:01" (2/3) ... [2022-02-15 01:32:01,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c444584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:32:01, skipping insertion in model container [2022-02-15 01:32:01,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:32:01" (3/3) ... [2022-02-15 01:32:01,393 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2022-02-15 01:32:01,405 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:32:01,405 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:32:01,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:32:01,446 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:32:01,446 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:32:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-02-15 01:32:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 01:32:01,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:01,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:01,462 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash -380972064, now seen corresponding path program 1 times [2022-02-15 01:32:01,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:01,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543038612] [2022-02-15 01:32:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:01,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:01,523 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:01,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:01,656 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:01,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543038612] [2022-02-15 01:32:01,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543038612] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:01,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:01,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:32:01,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418963388] [2022-02-15 01:32:01,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:01,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:32:01,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:32:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:32:01,681 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 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 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:01,813 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2022-02-15 01:32:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:32:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-02-15 01:32:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:01,821 INFO L225 Difference]: With dead ends: 58 [2022-02-15 01:32:01,821 INFO L226 Difference]: Without dead ends: 29 [2022-02-15 01:32:01,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:32:01,825 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:01,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 52 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:32:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-15 01:32:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-15 01:32:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-15 01:32:01,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2022-02-15 01:32:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-15 01:32:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-15 01:32:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:32:01,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:01,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:01,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:32:01,864 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash 580085489, now seen corresponding path program 1 times [2022-02-15 01:32:01,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:01,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389555367] [2022-02-15 01:32:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:01,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:01,867 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:01,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:01,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:01,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389555367] [2022-02-15 01:32:01,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [389555367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:01,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:01,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:32:01,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941694098] [2022-02-15 01:32:01,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:01,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:32:01,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:32:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:32:01,961 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:02,122 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-02-15 01:32:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:32:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-02-15 01:32:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:02,124 INFO L225 Difference]: With dead ends: 41 [2022-02-15 01:32:02,124 INFO L226 Difference]: Without dead ends: 39 [2022-02-15 01:32:02,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:32:02,129 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:02,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 45 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:32:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-15 01:32:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-02-15 01:32:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-15 01:32:02,153 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 17 [2022-02-15 01:32:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:02,154 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-15 01:32:02,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-15 01:32:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 01:32:02,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:02,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:02,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:32:02,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash -132185391, now seen corresponding path program 1 times [2022-02-15 01:32:02,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:02,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298335005] [2022-02-15 01:32:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:02,162 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:02,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:02,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:32:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:02,237 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:02,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298335005] [2022-02-15 01:32:02,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [298335005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:02,238 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:02,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:32:02,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340780804] [2022-02-15 01:32:02,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:02,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:32:02,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:32:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:32:02,240 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:32:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:02,339 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-02-15 01:32:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:32:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-15 01:32:02,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:02,341 INFO L225 Difference]: With dead ends: 46 [2022-02-15 01:32:02,341 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 01:32:02,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:32:02,347 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:02,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:32:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 01:32:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-15 01:32:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:32:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-02-15 01:32:02,367 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2022-02-15 01:32:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:02,367 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-02-15 01:32:02,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:32:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-15 01:32:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:32:02,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:02,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:02,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:32:02,369 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash -512108736, now seen corresponding path program 1 times [2022-02-15 01:32:02,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:02,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456101655] [2022-02-15 01:32:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:02,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:32:02,432 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:32:02,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:02,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:02,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 01:32:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:02,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:02,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456101655] [2022-02-15 01:32:02,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [456101655] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:02,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:02,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:32:02,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372902573] [2022-02-15 01:32:02,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:02,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:32:02,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:02,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:32:02,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:32:02,574 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:32:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:02,716 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-02-15 01:32:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:32:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-15 01:32:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:02,718 INFO L225 Difference]: With dead ends: 83 [2022-02-15 01:32:02,718 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 01:32:02,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:32:02,724 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:02,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 42 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:32:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 01:32:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2022-02-15 01:32:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 01:32:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-02-15 01:32:02,743 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2022-02-15 01:32:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:02,743 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-02-15 01:32:02,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:32:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-02-15 01:32:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:32:02,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:02,745 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:02,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:32:02,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash 735221632, now seen corresponding path program 1 times [2022-02-15 01:32:02,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:02,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641330664] [2022-02-15 01:32:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:02,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:32:02,950 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:32:02,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:03,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:03,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 01:32:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:07,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:07,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641330664] [2022-02-15 01:32:07,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [641330664] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:07,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:07,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:32:07,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008671156] [2022-02-15 01:32:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:07,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:32:07,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:32:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=309, Unknown=3, NotChecked=0, Total=380 [2022-02-15 01:32:07,146 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:09,246 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2022-02-15 01:32:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:32:09,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2022-02-15 01:32:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:09,249 INFO L225 Difference]: With dead ends: 118 [2022-02-15 01:32:09,250 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 01:32:09,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=222, Invalid=1181, Unknown=3, NotChecked=0, Total=1406 [2022-02-15 01:32:09,251 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:09,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 85 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 467 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-02-15 01:32:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 01:32:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2022-02-15 01:32:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 53 states have internal predecessors, (63), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-15 01:32:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-02-15 01:32:09,260 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 39 [2022-02-15 01:32:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:09,261 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-02-15 01:32:09,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-02-15 01:32:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:32:09,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:09,262 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:09,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:32:09,262 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1785248429, now seen corresponding path program 1 times [2022-02-15 01:32:09,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:09,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871080674] [2022-02-15 01:32:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:09,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:32:09,318 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:32:09,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:09,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:09,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 01:32:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:12,861 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:12,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871080674] [2022-02-15 01:32:12,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [871080674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:12,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:12,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:32:12,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135916116] [2022-02-15 01:32:12,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:32:12,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:32:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=310, Unknown=2, NotChecked=0, Total=380 [2022-02-15 01:32:12,863 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:15,098 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2022-02-15 01:32:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:32:15,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-02-15 01:32:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:15,104 INFO L225 Difference]: With dead ends: 202 [2022-02-15 01:32:15,104 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 01:32:15,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=260, Invalid=1460, Unknown=2, NotChecked=0, Total=1722 [2022-02-15 01:32:15,106 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:15,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 70 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 411 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-02-15 01:32:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 01:32:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 162. [2022-02-15 01:32:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 123 states have internal predecessors, (152), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 01:32:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 205 transitions. [2022-02-15 01:32:15,152 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 205 transitions. Word has length 42 [2022-02-15 01:32:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:15,152 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 205 transitions. [2022-02-15 01:32:15,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 205 transitions. [2022-02-15 01:32:15,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 01:32:15,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:15,158 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:15,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:32:15,159 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 853900399, now seen corresponding path program 2 times [2022-02-15 01:32:15,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:15,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692055090] [2022-02-15 01:32:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:15,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:32:15,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:32:15,341 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:32:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:15,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 01:32:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:19,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:19,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692055090] [2022-02-15 01:32:19,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [692055090] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:19,566 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:19,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:32:19,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612644592] [2022-02-15 01:32:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:19,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:32:19,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:32:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=344, Unknown=3, NotChecked=0, Total=420 [2022-02-15 01:32:19,567 INFO L87 Difference]: Start difference. First operand 162 states and 205 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:22,483 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2022-02-15 01:32:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:32:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-02-15 01:32:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:22,484 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:32:22,484 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 01:32:22,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=199, Invalid=1056, Unknown=5, NotChecked=0, Total=1260 [2022-02-15 01:32:22,489 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:22,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 88 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 424 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-02-15 01:32:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 01:32:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 01:32:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 01:32:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 01:32:22,490 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2022-02-15 01:32:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:22,490 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 01:32:22,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:32:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 01:32:22,490 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 01:32:22,493 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:32:22,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:32:22,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-15 01:32:40,786 WARN L228 SmtUtils]: Spent 18.21s on a formula simplification. DAG size of input: 76 DAG size of output: 25 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:32:49,309 WARN L228 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 71 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:33:05,848 WARN L228 SmtUtils]: Spent 16.53s on a formula simplification. DAG size of input: 76 DAG size of output: 25 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:33:29,269 WARN L228 SmtUtils]: Spent 20.36s on a formula simplification. DAG size of input: 76 DAG size of output: 25 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-15 01:33:29,276 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-02-15 01:33:29,276 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-02-15 01:33:29,276 INFO L858 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-02-15 01:33:29,276 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-02-15 01:33:29,276 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-02-15 01:33:29,276 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-02-15 01:33:29,277 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-02-15 01:33:29,277 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 24 48) the Hoare annotation is: true [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse0 (* main_~i~0 2))) (or (and (< main_~j~0 main_~n~0) (= main_~k~0 main_~j~0) (<= .cse0 main_~k~0)) (and (<= (+ .cse0 1) main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 main_~j~0)))) [2022-02-15 01:33:29,277 INFO L861 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= main_~k~0 main_~n~0) (<= (* main_~i~0 2) main_~j~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (and (<= main_~k~0 main_~n~0) (<= (* main_~i~0 2) main_~j~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* main_~i~0 2))) (or (and (< main_~j~0 main_~n~0) (= main_~k~0 main_~j~0) (<= .cse0 main_~k~0)) (and (<= (+ .cse0 1) main_~k~0) (< main_~k~0 main_~n~0) (<= .cse0 main_~j~0)))) [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L37-1(lines 36 38) the Hoare annotation is: (let ((.cse0 (* main_~i~0 2))) (or (and (< main_~j~0 main_~n~0) (= main_~k~0 main_~j~0) (<= .cse0 main_~k~0)) (and (<= (+ .cse0 1) main_~k~0) (< main_~k~0 main_~n~0) (<= .cse0 main_~j~0)))) [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L33-2(lines 33 45) the Hoare annotation is: (and (<= main_~k~0 main_~n~0) (<= (* main_~i~0 2) main_~j~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L33-3(lines 33 45) the Hoare annotation is: (and (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,277 INFO L861 garLoopResultBuilder]: At program point L29(lines 29 32) the Hoare annotation is: true [2022-02-15 01:33:29,277 INFO L854 garLoopResultBuilder]: At program point L29-1(lines 29 32) the Hoare annotation is: (and (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point L46(lines 24 48) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 24 48) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L854 garLoopResultBuilder]: At program point L42(lines 34 44) the Hoare annotation is: (and (<= main_~k~0 main_~n~0) (<= (* main_~i~0 2) main_~j~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,278 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 44) the Hoare annotation is: (and (<= main_~k~0 main_~n~0) (<= (* main_~i~0 2) main_~j~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 24 48) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L854 garLoopResultBuilder]: At program point L35(lines 35 43) the Hoare annotation is: (and (<= |main_#t~nondet5| 2147483647) (<= 0 (+ 2147483648 |main_#t~nondet5|)) (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= (* main_~i~0 2) main_~j~0) (<= main_~n~0 main_~k~0)) [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L854 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (or (forall ((v_main_~i~0_29 Int) (v_main_~k~0_66 Int)) (or (not (<= (+ (* v_main_~i~0_29 2) 1) v_main_~k~0_66)) (not (< v_main_~k~0_66 main_~n~0)))) (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-02-15 01:33:29,278 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-02-15 01:33:29,278 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (and (or (forall ((v_main_~i~0_29 Int) (v_main_~k~0_66 Int)) (or (not (<= (+ (* v_main_~i~0_29 2) 1) v_main_~k~0_66)) (not (< v_main_~k~0_66 main_~n~0)))) (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-02-15 01:33:29,279 INFO L854 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-15 01:33:29,279 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-15 01:33:29,279 INFO L854 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (and (or (forall ((v_main_~i~0_29 Int) (v_main_~k~0_66 Int)) (or (not (<= (+ (* v_main_~i~0_29 2) 1) v_main_~k~0_66)) (not (< v_main_~k~0_66 main_~n~0)))) (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-02-15 01:33:29,281 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-02-15 01:33:29,282 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 01:33:29,297 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_29,QUANTIFIED] [2022-02-15 01:33:29,297 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,QUANTIFIED] [2022-02-15 01:33:29,297 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,QUANTIFIED] [2022-02-15 01:33:29,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:33:29 BoogieIcfgContainer [2022-02-15 01:33:29,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 01:33:29,301 INFO L158 Benchmark]: Toolchain (without parser) took 88324.31ms. Allocated memory was 183.5MB in the beginning and 250.6MB in the end (delta: 67.1MB). Free memory was 129.6MB in the beginning and 107.9MB in the end (delta: 21.6MB). Peak memory consumption was 89.5MB. Max. memory is 8.0GB. [2022-02-15 01:33:29,301 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory is still 146.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 01:33:29,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.19ms. Allocated memory is still 183.5MB. Free memory was 129.4MB in the beginning and 154.5MB in the end (delta: -25.1MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-02-15 01:33:29,302 INFO L158 Benchmark]: Boogie Preprocessor took 21.36ms. Allocated memory is still 183.5MB. Free memory was 154.5MB in the beginning and 152.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 01:33:29,302 INFO L158 Benchmark]: RCFGBuilder took 205.67ms. Allocated memory is still 183.5MB. Free memory was 152.9MB in the beginning and 142.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 01:33:29,302 INFO L158 Benchmark]: TraceAbstraction took 87919.25ms. Allocated memory was 183.5MB in the beginning and 250.6MB in the end (delta: 67.1MB). Free memory was 141.7MB in the beginning and 107.9MB in the end (delta: 33.8MB). Peak memory consumption was 102.5MB. Max. memory is 8.0GB. [2022-02-15 01:33:29,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory is still 146.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 166.19ms. Allocated memory is still 183.5MB. Free memory was 129.4MB in the beginning and 154.5MB in the end (delta: -25.1MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.36ms. Allocated memory is still 183.5MB. Free memory was 154.5MB in the beginning and 152.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 205.67ms. Allocated memory is still 183.5MB. Free memory was 152.9MB in the beginning and 142.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 87919.25ms. Allocated memory was 183.5MB in the beginning and 250.6MB in the end (delta: 67.1MB). Free memory was 141.7MB in the beginning and 107.9MB in the end (delta: 33.8MB). Peak memory consumption was 102.5MB. 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_~i~0_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,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: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 87.8s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 66.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 334 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 325 mSDsluCounter, 424 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 163 IncrementalHoareTripleChecker+Unchecked, 258 mSDsCounter, 214 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1759 IncrementalHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 214 mSolverCounterUnsat, 166 mSDtfsCounter, 1759 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 62 SyntacticMatches, 16 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 18.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=6, InterpolantAutomatonStates: 97, 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, 7 MinimizatonAttempts, 56 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 30 LocationsWithAnnotation, 282 PreInvPairs, 386 NumberOfFragments, 303 HoareAnnotationTreeSize, 282 FomulaSimplifications, 249 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 30 FomulaSimplificationsInter, 3967 FormulaSimplificationTreeSizeReductionInter, 66.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: k <= n && n <= k - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((j < n && k == j) && i * 2 <= k) || ((i * 2 + 1 <= k && k <= n) && i * 2 <= j) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (k <= n && i * 2 <= j) && n <= k - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert [2022-02-15 01:33:29,307 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_29,QUANTIFIED] [2022-02-15 01:33:29,307 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,QUANTIFIED] [2022-02-15 01:33:29,307 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,QUANTIFIED] [2022-02-15 01:33:29,308 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_29,QUANTIFIED] [2022-02-15 01:33:29,308 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,QUANTIFIED] [2022-02-15 01:33:29,315 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~k~0_66,QUANTIFIED] Derived contract for procedure __VERIFIER_assert: (((forall v_main_~i~0_29 : int, v_main_~k~0_66 : int :: !(v_main_~i~0_29 * 2 + 1 <= v_main_~k~0_66) || !(v_main_~k~0_66 < n)) || !(\old(cond) == 1)) || \old(cond) == cond) && (\old(cond) == 0 || !(cond == 0)) RESULT: Ultimate proved your program to be correct! [2022-02-15 01:33:29,387 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...