/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/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:15:25,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:15:25,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:15:25,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:15:25,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:15:25,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:15:25,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:15:25,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:15:25,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:15:25,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:15:25,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:15:25,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:15:25,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:15:25,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:15:25,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:15:25,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:15:25,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:15:25,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:15:25,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:15:25,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:15:25,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:15:25,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:15:25,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:15:25,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:15:25,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:15:25,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:15:25,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:25,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:15:25,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:15:25,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:15:25,604 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:15:25,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:15:25,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:15:25,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:15:25,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:15:25,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:15:25,915 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:15:25,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2021-05-02 23:15:25,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207628a57/3a53367a544640b1a730ba3a314a9150/FLAG601cb32da [2021-05-02 23:15:26,352 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:15:26,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2021-05-02 23:15:26,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207628a57/3a53367a544640b1a730ba3a314a9150/FLAG601cb32da [2021-05-02 23:15:26,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207628a57/3a53367a544640b1a730ba3a314a9150 [2021-05-02 23:15:26,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:15:26,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:15:26,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:26,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:15:26,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:15:26,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ddf4e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26, skipping insertion in model container [2021-05-02 23:15:26,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:15:26,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:15:26,517 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2021-05-02 23:15:26,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:26,532 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:15:26,542 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2021-05-02 23:15:26,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:26,556 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:15:26,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26 WrapperNode [2021-05-02 23:15:26,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:26,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:15:26,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:15:26,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:15:26,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... [2021-05-02 23:15:26,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:15:26,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:15:26,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:15:26,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:15:26,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:26,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:15:26,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:15:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:15:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:15:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:15:26,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:15:26,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:15:26,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:15:26,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:15:26,700 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:15:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:15:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:15:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:15:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:15:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:15:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:15:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:15:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:15:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:15:26,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:15:26,895 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:15:26,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:26 BoogieIcfgContainer [2021-05-02 23:15:26,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:15:26,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:15:26,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:15:26,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:15:26,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:15:26" (1/3) ... [2021-05-02 23:15:26,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7078220c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:26, skipping insertion in model container [2021-05-02 23:15:26,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:26" (2/3) ... [2021-05-02 23:15:26,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7078220c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:26, skipping insertion in model container [2021-05-02 23:15:26,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:26" (3/3) ... [2021-05-02 23:15:26,901 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2021-05-02 23:15:26,905 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:15:26,908 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:15:26,918 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:15:26,935 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:15:26,935 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:15:26,935 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:15:26,935 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:15:26,936 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:15:26,936 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:15:26,936 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:15:26,936 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:15:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:15:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:15:26,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:26,955 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:26,955 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:26,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1274873075, now seen corresponding path program 1 times [2021-05-02 23:15:26,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:26,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081123065] [2021-05-02 23:15:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:27,004 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:27,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:27,086 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:27,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081123065] [2021-05-02 23:15:27,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081123065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:27,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:27,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:15:27,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067904543] [2021-05-02 23:15:27,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:15:27,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:27,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:15:27,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:27,099 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:27,148 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 23:15:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:15:27,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:15:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:27,154 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:15:27,154 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 23:15:27,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 23:15:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 23:15:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 23:15:27,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 23:15:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:27,200 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 23:15:27,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 23:15:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:15:27,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:27,202 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:27,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:15:27,202 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1280414201, now seen corresponding path program 1 times [2021-05-02 23:15:27,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:27,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342416669] [2021-05-02 23:15:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:27,211 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:27,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:27,316 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342416669] [2021-05-02 23:15:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342416669] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:27,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:27,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:15:27,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287213123] [2021-05-02 23:15:27,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:15:27,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:15:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:15:27,318 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:27,357 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 23:15:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:15:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:15:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:27,358 INFO L225 Difference]: With dead ends: 20 [2021-05-02 23:15:27,359 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:15:27,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:15:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-02 23:15:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:15:27,372 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-02 23:15:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:27,372 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:15:27,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:15:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:15:27,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:27,373 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:27,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:15:27,373 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash -985852763, now seen corresponding path program 1 times [2021-05-02 23:15:27,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:27,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723965782] [2021-05-02 23:15:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:27,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_9 8) InVars {main_~i~0=v_main_~i~0_9} OutVars{main_~i~0=v_main_~i~0_9} AuxVars[] AssignedVars[] [2021-05-02 23:15:27,442 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:27,485 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:27,509 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:27,532 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:27,556 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:27,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:27,778 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723965782] [2021-05-02 23:15:27,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [723965782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:27,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:27,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:15:27,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544526461] [2021-05-02 23:15:27,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:15:27,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:27,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:15:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:15:27,780 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:27,926 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 23:15:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:15:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 23:15:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:27,927 INFO L225 Difference]: With dead ends: 21 [2021-05-02 23:15:27,927 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:15:27,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:15:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:15:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 23:15:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 23:15:27,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-05-02 23:15:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:27,931 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 23:15:27,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 23:15:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:15:27,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:27,932 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:27,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:15:27,932 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1380152381, now seen corresponding path program 2 times [2021-05-02 23:15:27,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:27,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839668616] [2021-05-02 23:15:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:27,939 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_13 7) InVars {main_~i~0=v_main_~i~0_13} OutVars{main_~i~0=v_main_~i~0_13} AuxVars[] AssignedVars[] [2021-05-02 23:15:27,942 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:27,944 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:27,951 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:27,975 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:27,990 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:27,997 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_15 8) InVars {main_~i~0=v_main_~i~0_15} OutVars{main_~i~0=v_main_~i~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:15:28,004 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:28,009 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:28,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:28,049 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:28,064 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:28,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:28,271 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:28,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839668616] [2021-05-02 23:15:28,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [839668616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:28,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:28,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:15:28,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288533416] [2021-05-02 23:15:28,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:15:28,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:28,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:15:28,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:15:28,277 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-05-02 23:15:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:28,466 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-02 23:15:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:15:28,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 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 15 [2021-05-02 23:15:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:28,467 INFO L225 Difference]: With dead ends: 23 [2021-05-02 23:15:28,467 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:15:28,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:15:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:15:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 23:15:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:15:28,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-05-02 23:15:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:28,477 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:15:28,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-05-02 23:15:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:15:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:15:28,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:28,479 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:28,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:15:28,480 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1950004065, now seen corresponding path program 3 times [2021-05-02 23:15:28,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:28,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732180171] [2021-05-02 23:15:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:28,492 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_20 7) InVars {main_~i~0=v_main_~i~0_20} OutVars{main_~i~0=v_main_~i~0_20} AuxVars[] AssignedVars[] [2021-05-02 23:15:28,497 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:28,502 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:28,508 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:28,529 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:28,542 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:28,549 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_22 8) InVars {main_~i~0=v_main_~i~0_22} OutVars{main_~i~0=v_main_~i~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:15:28,553 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:28,571 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:28,577 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:28,593 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:28,607 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:28,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:28,853 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:28,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732180171] [2021-05-02 23:15:28,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [732180171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:28,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:28,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:15:28,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666995273] [2021-05-02 23:15:28,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:15:28,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:15:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:15:28,855 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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) [2021-05-02 23:15:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:29,104 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-02 23:15:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:15:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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 [2021-05-02 23:15:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:29,108 INFO L225 Difference]: With dead ends: 25 [2021-05-02 23:15:29,108 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:15:29,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:15:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:15:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 23:15:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-02 23:15:29,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2021-05-02 23:15:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:29,112 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-02 23:15:29,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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) [2021-05-02 23:15:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-02 23:15:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:15:29,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:29,113 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:29,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:15:29,113 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:29,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1815254145, now seen corresponding path program 4 times [2021-05-02 23:15:29,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:29,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839833112] [2021-05-02 23:15:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:29,119 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_28 7) InVars {main_~i~0=v_main_~i~0_28} OutVars{main_~i~0=v_main_~i~0_28} AuxVars[] AssignedVars[] [2021-05-02 23:15:29,122 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:29,123 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:29,128 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:29,145 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:29,160 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:29,164 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_30 8) InVars {main_~i~0=v_main_~i~0_30} OutVars{main_~i~0=v_main_~i~0_30} AuxVars[] AssignedVars[] [2021-05-02 23:15:29,166 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:29,178 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:29,183 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:29,195 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:29,211 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:29,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:29,442 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839833112] [2021-05-02 23:15:29,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [839833112] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:29,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:29,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:15:29,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321437850] [2021-05-02 23:15:29,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:15:29,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:29,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:15:29,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:15:29,446 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-05-02 23:15:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:29,736 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-02 23:15:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:15:29,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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 19 [2021-05-02 23:15:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:29,737 INFO L225 Difference]: With dead ends: 27 [2021-05-02 23:15:29,737 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:15:29,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:15:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:15:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 23:15:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-02 23:15:29,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-05-02 23:15:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:29,742 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-02 23:15:29,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-05-02 23:15:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-02 23:15:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:15:29,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:29,742 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:29,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:15:29,743 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:29,743 INFO L82 PathProgramCache]: Analyzing trace with hash 429036573, now seen corresponding path program 5 times [2021-05-02 23:15:29,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:29,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838049184] [2021-05-02 23:15:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:29,748 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_37 7) InVars {main_~i~0=v_main_~i~0_37} OutVars{main_~i~0=v_main_~i~0_37} AuxVars[] AssignedVars[] [2021-05-02 23:15:29,751 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:29,764 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:29,770 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:29,778 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:29,790 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:29,794 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_39 8) InVars {main_~i~0=v_main_~i~0_39} OutVars{main_~i~0=v_main_~i~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:15:29,797 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:29,799 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:29,805 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:29,822 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:29,836 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:29,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:30,128 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:30,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838049184] [2021-05-02 23:15:30,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838049184] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:30,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:30,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:15:30,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918628230] [2021-05-02 23:15:30,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:15:30,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:30,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:15:30,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:15:30,129 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-05-02 23:15:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:30,481 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-02 23:15:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:15:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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 21 [2021-05-02 23:15:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:30,482 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:15:30,482 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 23:15:30,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:15:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 23:15:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 23:15:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-02 23:15:30,486 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2021-05-02 23:15:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:30,486 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-02 23:15:30,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-05-02 23:15:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-02 23:15:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:15:30,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:30,487 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:30,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:15:30,487 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1118833979, now seen corresponding path program 6 times [2021-05-02 23:15:30,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:30,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643303995] [2021-05-02 23:15:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:30,492 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_47 7) InVars {main_~i~0=v_main_~i~0_47} OutVars{main_~i~0=v_main_~i~0_47} AuxVars[] AssignedVars[] [2021-05-02 23:15:30,494 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:30,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:30,500 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:30,517 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:30,529 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:30,532 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_49 8) InVars {main_~i~0=v_main_~i~0_49} OutVars{main_~i~0=v_main_~i~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:15:30,534 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:30,543 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:30,552 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:30,560 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:30,572 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:30,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:30,839 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:30,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643303995] [2021-05-02 23:15:30,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [643303995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:30,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:30,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:15:30,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328820637] [2021-05-02 23:15:30,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:15:30,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:15:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:15:30,841 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-05-02 23:15:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:31,285 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-02 23:15:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:15:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 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 23 [2021-05-02 23:15:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:31,286 INFO L225 Difference]: With dead ends: 31 [2021-05-02 23:15:31,286 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:15:31,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:15:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:15:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 23:15:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-02 23:15:31,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-05-02 23:15:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:31,291 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-02 23:15:31,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-05-02 23:15:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-02 23:15:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:15:31,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:31,291 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:31,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:15:31,291 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1705789735, now seen corresponding path program 7 times [2021-05-02 23:15:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179859306] [2021-05-02 23:15:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:31,305 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_58 7) InVars {main_~i~0=v_main_~i~0_58} OutVars{main_~i~0=v_main_~i~0_58} AuxVars[] AssignedVars[] [2021-05-02 23:15:31,308 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:31,317 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:31,322 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:31,330 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:31,341 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:31,343 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_60 8) InVars {main_~i~0=v_main_~i~0_60} OutVars{main_~i~0=v_main_~i~0_60} AuxVars[] AssignedVars[] [2021-05-02 23:15:31,345 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:31,346 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:31,350 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:31,366 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:31,378 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:31,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:31,712 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:31,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179859306] [2021-05-02 23:15:31,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1179859306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:31,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:31,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:15:31,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947909297] [2021-05-02 23:15:31,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:15:31,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:15:31,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:15:31,714 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-05-02 23:15:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:32,303 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-05-02 23:15:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:15:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.05) internal successors, (21), 19 states have internal predecessors, (21), 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 25 [2021-05-02 23:15:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:32,305 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:15:32,305 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:15:32,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 640.7ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:15:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:15:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 23:15:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-02 23:15:32,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2021-05-02 23:15:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:32,310 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-02 23:15:32,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.05) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-05-02 23:15:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-02 23:15:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:15:32,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:32,311 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:32,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:15:32,311 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1139991659, now seen corresponding path program 8 times [2021-05-02 23:15:32,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:32,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346561826] [2021-05-02 23:15:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:32,317 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_70 7) InVars {main_~i~0=v_main_~i~0_70} OutVars{main_~i~0=v_main_~i~0_70} AuxVars[] AssignedVars[] [2021-05-02 23:15:32,319 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:32,328 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:32,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:32,340 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:32,352 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:32,354 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_72 8) InVars {main_~i~0=v_main_~i~0_72} OutVars{main_~i~0=v_main_~i~0_72} AuxVars[] AssignedVars[] [2021-05-02 23:15:32,356 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 23:15:32,365 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:15:32,372 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:15:32,380 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 23:15:32,391 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:15:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:32,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:32,716 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:32,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346561826] [2021-05-02 23:15:32,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346561826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:32,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:32,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:15:32,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479456996] [2021-05-02 23:15:32,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:15:32,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:15:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:15:32,718 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-05-02 23:15:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:33,276 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:15:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:15:33,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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 29 [2021-05-02 23:15:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:33,276 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:15:33,276 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 23:15:33,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 649.2ms TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:15:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 23:15:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 23:15:33,278 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) [2021-05-02 23:15:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 23:15:33,278 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-05-02 23:15:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:33,278 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 23:15:33,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-05-02 23:15:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 23:15:33,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 23:15:33,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:15:33,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 23:15:33,667 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-05-02 23:15:33,671 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 23:15:33,671 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 23:15:33,671 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 23:15:33,671 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:15:33,671 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 23:15:33,671 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:15:33,671 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 22 28) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L194 CegarLoopUtils]: At program point L24-2(lines 24 26) the Hoare annotation is: (or (and (= 7 main_~i~0) (= 14 main_~sn~0)) (and (= main_~sn~0 10) (= 5 main_~i~0)) (and (= main_~i~0 8) (= 16 main_~sn~0)) (and (= main_~sn~0 12) (= main_~i~0 6)) (and (= main_~i~0 1) (= 2 main_~sn~0)) (and (= main_~sn~0 4) (= main_~i~0 2)) (and (= 6 main_~sn~0) (= main_~i~0 3)) (and (= main_~i~0 4) (= main_~sn~0 8))) [2021-05-02 23:15:33,672 INFO L194 CegarLoopUtils]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (= main_~sn~0 12) (= 7 main_~i~0)) (and (= main_~sn~0 8) (= 5 main_~i~0)) (and (= main_~i~0 4) (= 6 main_~sn~0)) (and (= main_~sn~0 4) (= main_~i~0 3)) (and (= main_~i~0 2) (= 2 main_~sn~0)) (and (= 14 main_~sn~0) (= main_~i~0 8)) (and (= main_~sn~0 10) (= main_~i~0 6)) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (= 16 main_~sn~0) (= main_~i~0 9))) [2021-05-02 23:15:33,672 INFO L194 CegarLoopUtils]: At program point L24-4(lines 24 26) the Hoare annotation is: (or (= main_~sn~0 0) (and (<= main_~sn~0 16) (< 15 main_~sn~0))) [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 22 28) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L194 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:15:33,672 INFO L194 CegarLoopUtils]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-05-02 23:15:33,672 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2021-05-02 23:15:33,673 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:15:33,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:15:33 BoogieIcfgContainer [2021-05-02 23:15:33,683 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:15:33,684 INFO L168 Benchmark]: Toolchain (without parser) took 7302.72 ms. Allocated memory was 224.4 MB in the beginning and 351.3 MB in the end (delta: 126.9 MB). Free memory was 190.2 MB in the beginning and 250.8 MB in the end (delta: -60.6 MB). Peak memory consumption was 189.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:33,684 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 224.4 MB. Free memory is still 206.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:15:33,684 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.83 ms. Allocated memory is still 224.4 MB. Free memory was 190.0 MB in the beginning and 180.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:33,684 INFO L168 Benchmark]: Boogie Preprocessor took 69.97 ms. Allocated memory is still 224.4 MB. Free memory was 180.7 MB in the beginning and 208.0 MB in the end (delta: -27.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:33,684 INFO L168 Benchmark]: RCFGBuilder took 267.21 ms. Allocated memory is still 224.4 MB. Free memory was 208.0 MB in the beginning and 195.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:33,684 INFO L168 Benchmark]: TraceAbstraction took 6786.24 ms. Allocated memory was 224.4 MB in the beginning and 351.3 MB in the end (delta: 126.9 MB). Free memory was 194.4 MB in the beginning and 250.8 MB in the end (delta: -56.4 MB). Peak memory consumption was 193.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:33,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 224.4 MB. Free memory is still 206.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 171.83 ms. Allocated memory is still 224.4 MB. Free memory was 190.0 MB in the beginning and 180.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.97 ms. Allocated memory is still 224.4 MB. Free memory was 180.7 MB in the beginning and 208.0 MB in the end (delta: -27.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 267.21 ms. Allocated memory is still 224.4 MB. Free memory was 208.0 MB in the beginning and 195.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6786.24 ms. Allocated memory was 224.4 MB in the beginning and 351.3 MB in the end (delta: 126.9 MB). Free memory was 194.4 MB in the beginning and 250.8 MB in the end (delta: -56.4 MB). Peak memory consumption was 193.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6344.9ms, OverallIterations: 10, TraceHistogramMax: 9, EmptinessCheckTime: 18.1ms, AutomataDifference: 2945.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 391.8ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 102 SDtfs, 75 SDslu, 509 SDs, 0 SdLazy, 1751 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 724.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 3326.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=9, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 69.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 19 LocationsWithAnnotation, 79 PreInvPairs, 121 NumberOfFragments, 183 HoareAnnotationTreeSize, 79 FomulaSimplifications, 466 FormulaSimplificationTreeSizeReduction, 77.3ms HoareSimplificationTime, 19 FomulaSimplificationsInter, 659 FormulaSimplificationTreeSizeReductionInter, 303.4ms 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: ((((((((sn == 12 && 7 == i) || (sn == 8 && 5 == i)) || (i == 4 && 6 == sn)) || (sn == 4 && i == 3)) || (i == 2 && 2 == sn)) || (14 == sn && i == 8)) || (sn == 10 && i == 6)) || (sn == 0 && i == 1)) || (16 == sn && i == 9) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...