/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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:02:57,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:02:57,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:02:57,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:02:57,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:02:57,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:02:57,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:02:57,360 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 23:02:57,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:02:57,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:02:57,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:02:57,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:02:57,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:02:57,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:02:57,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:02:57,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:02:57,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:02:57,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:02:57,375 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:02:57,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:02:57,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:02:57,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:02:57,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:02:57,376 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:02:57,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:02:57,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:02:57,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:02:57,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:02:57,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:02:57,641 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:02:57,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2021-05-02 23:02:57,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84602f351/e34192937d23417b83ab63823b76ddcb/FLAG4666ba433 [2021-05-02 23:02:58,031 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:02:58,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2021-05-02 23:02:58,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84602f351/e34192937d23417b83ab63823b76ddcb/FLAG4666ba433 [2021-05-02 23:02:58,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84602f351/e34192937d23417b83ab63823b76ddcb [2021-05-02 23:02:58,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:02:58,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:02:58,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:02:58,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:02:58,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:02:58,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca18772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58, skipping insertion in model container [2021-05-02 23:02:58,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:02:58,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:02:58,174 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/sum01_bug02.i[812,825] [2021-05-02 23:02:58,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:02:58,186 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:02:58,220 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/sum01_bug02.i[812,825] [2021-05-02 23:02:58,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:02:58,231 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:02:58,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58 WrapperNode [2021-05-02 23:02:58,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:02:58,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:02:58,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:02:58,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:02:58,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (1/1) ... [2021-05-02 23:02:58,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:02:58,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:02:58,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:02:58,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:02:58,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (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 23:02:58,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:02:58,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:02:58,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:02:58,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:02:58,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:02:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 23:02:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:02:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:02:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:02:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:02:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:02:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:02:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:02:58,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:02:58,525 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:02:58,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:02:58 BoogieIcfgContainer [2021-05-02 23:02:58,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:02:58,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:02:58,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:02:58,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:02:58,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:02:58" (1/3) ... [2021-05-02 23:02:58,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b43f4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:02:58, skipping insertion in model container [2021-05-02 23:02:58,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:58" (2/3) ... [2021-05-02 23:02:58,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b43f4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:02:58, skipping insertion in model container [2021-05-02 23:02:58,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:02:58" (3/3) ... [2021-05-02 23:02:58,531 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-05-02 23:02:58,535 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:02:58,543 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:02:58,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:02:58,599 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:02:58,599 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:02:58,599 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:02:58,600 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:02:58,600 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:02:58,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:02:58,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:02:58,600 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:02:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 23:02:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:02:58,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:58,630 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:58,631 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:58,634 INFO L82 PathProgramCache]: Analyzing trace with hash -872495525, now seen corresponding path program 1 times [2021-05-02 23:02:58,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:58,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127796676] [2021-05-02 23:02:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:58,688 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:58,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:58,840 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 23:02:58,841 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:58,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127796676] [2021-05-02 23:02:58,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [127796676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:58,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:58,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:02:58,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453594546] [2021-05-02 23:02:58,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:02:58,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:02:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:02:58,861 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 23:02:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:58,918 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 23:02:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:02:58,920 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 23:02:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:58,925 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:02:58,926 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:02:58,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:02:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:02:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:02:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 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 23:02:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 23:02:58,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-02 23:02:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:58,962 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 23:02:58,963 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 23:02:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 23:02:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:02:58,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:58,964 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:58,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:02:58,964 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash -884501298, now seen corresponding path program 1 times [2021-05-02 23:02:58,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:58,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361971638] [2021-05-02 23:02:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:58,979 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,118 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 23:02:59,118 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:59,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361971638] [2021-05-02 23:02:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [361971638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:59,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:59,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:02:59,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238529810] [2021-05-02 23:02:59,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:02:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:02:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:02:59,120 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 23:02:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:59,258 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-02 23:02:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:02:59,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 23:02:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:59,260 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:02:59,260 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:02:59,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:02:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:02:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 23:02:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 23:02:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 23:02:59,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2021-05-02 23:02:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:59,273 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 23:02:59,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 23:02:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 23:02:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:02:59,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:59,275 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:59,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:02:59,275 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:59,276 INFO L82 PathProgramCache]: Analyzing trace with hash 60854025, now seen corresponding path program 1 times [2021-05-02 23:02:59,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:59,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740518878] [2021-05-02 23:02:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:59,316 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= v_main_~i~0_11 v_main_~n~0_6) (< v_main_~i~0_11 v_main_~j~0_7)) InVars {main_~i~0=v_main_~i~0_11, main_~n~0=v_main_~n~0_6, main_~j~0=v_main_~j~0_7} OutVars{main_~i~0=v_main_~i~0_11, main_~n~0=v_main_~n~0_6, main_~j~0=v_main_~j~0_7} AuxVars[] AssignedVars[] [2021-05-02 23:02:59,336 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 89.2 percent of original size [2021-05-02 23:02:59,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:59,400 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:59,426 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-02 23:02:59,435 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-02 23:02:59,491 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 89.2 percent of original size 91 [2021-05-02 23:02:59,527 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:02:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,637 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 23:02:59,774 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740518878] [2021-05-02 23:02:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740518878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:59,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:59,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:02:59,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230889000] [2021-05-02 23:02:59,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:02:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:02:59,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:02:59,776 INFO L87 Difference]: Start difference. First operand 19 states and 21 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 23:03:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:00,273 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-02 23:03:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:03:00,273 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 23:03:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:00,277 INFO L225 Difference]: With dead ends: 33 [2021-05-02 23:03:00,278 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:03:00,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:03:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:03:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-05-02 23:03:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 23:03:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 23:03:00,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-05-02 23:03:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:00,284 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 23:03:00,284 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 23:03:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 23:03:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:03:00,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:00,284 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:00,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:03:00,285 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash 371979204, now seen corresponding path program 2 times [2021-05-02 23:03:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:00,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102657700] [2021-05-02 23:03:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:00,294 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_15 v_main_~j~0_11) (<= (+ v_main_~i~0_15 1) v_main_~n~0_7)) InVars {main_~i~0=v_main_~i~0_15, main_~n~0=v_main_~n~0_7, main_~j~0=v_main_~j~0_11} OutVars{main_~i~0=v_main_~i~0_15, main_~n~0=v_main_~n~0_7, main_~j~0=v_main_~j~0_11} AuxVars[] AssignedVars[] [2021-05-02 23:03:00,302 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 89.8 percent of original size [2021-05-02 23:03:00,305 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:00,308 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:00,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-02 23:03:00,339 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-02 23:03:00,388 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 89.8 percent of original size 97 [2021-05-02 23:03:00,417 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:03:00,421 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_17 v_main_~j~0_13) (<= v_main_~i~0_17 v_main_~n~0_8)) InVars {main_~i~0=v_main_~i~0_17, main_~n~0=v_main_~n~0_8, main_~j~0=v_main_~j~0_13} OutVars{main_~i~0=v_main_~i~0_17, main_~n~0=v_main_~n~0_8, main_~j~0=v_main_~j~0_13} AuxVars[] AssignedVars[] [2021-05-02 23:03:00,425 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 89.2 percent of original size [2021-05-02 23:03:00,427 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:00,429 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:00,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-02 23:03:00,451 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-02 23:03:00,494 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 89.2 percent of original size 91 [2021-05-02 23:03:00,519 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:03:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:00,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:00,604 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 23:03:00,822 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:00,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102657700] [2021-05-02 23:03:00,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [102657700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:00,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:00,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:03:00,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357458767] [2021-05-02 23:03:00,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:03:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:00,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:03:00,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:03:00,826 INFO L87 Difference]: Start difference. First operand 24 states and 27 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 23:03:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:01,555 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-02 23:03:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:03:01,555 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 23:03:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:01,556 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:03:01,556 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:03:01,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:03:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:03:01,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-05-02 23:03:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 23:03:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-05-02 23:03:01,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2021-05-02 23:03:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:01,562 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-05-02 23:03:01,562 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 23:03:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-05-02 23:03:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:03:01,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:01,563 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:01,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:03:01,563 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash -437367422, now seen corresponding path program 1 times [2021-05-02 23:03:01,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:01,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432205509] [2021-05-02 23:03:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:01,574 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_22 v_main_~j~0_18) (<= (+ v_main_~i~0_22 1) v_main_~n~0_9)) InVars {main_~i~0=v_main_~i~0_22, main_~n~0=v_main_~n~0_9, main_~j~0=v_main_~j~0_18} OutVars{main_~i~0=v_main_~i~0_22, main_~n~0=v_main_~n~0_9, main_~j~0=v_main_~j~0_18} AuxVars[] AssignedVars[] [2021-05-02 23:03:01,578 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 89.8 percent of original size [2021-05-02 23:03:01,609 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:01,613 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:01,627 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-02 23:03:01,631 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-02 23:03:01,655 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 89.8 percent of original size 97 [2021-05-02 23:03:01,678 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:03:01,688 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_24 v_main_~j~0_20) (<= v_main_~i~0_24 v_main_~n~0_10)) InVars {main_~i~0=v_main_~i~0_24, main_~n~0=v_main_~n~0_10, main_~j~0=v_main_~j~0_20} OutVars{main_~i~0=v_main_~i~0_24, main_~n~0=v_main_~n~0_10, main_~j~0=v_main_~j~0_20} AuxVars[] AssignedVars[] [2021-05-02 23:03:01,696 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 89.2 percent of original size [2021-05-02 23:03:01,717 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:01,719 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:01,732 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-02 23:03:01,736 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-02 23:03:01,760 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 89.2 percent of original size 91 [2021-05-02 23:03:01,790 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= v_main_~j~0_22 v_main_~i~0_26) (<= v_main_~i~0_26 v_main_~n~0_11)) InVars {main_~i~0=v_main_~i~0_26, main_~n~0=v_main_~n~0_11, main_~j~0=v_main_~j~0_22} OutVars{main_~i~0=v_main_~i~0_26, main_~n~0=v_main_~n~0_11, main_~j~0=v_main_~j~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:03:01,793 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 88.0 percent of original size [2021-05-02 23:03:01,802 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:01,805 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:01,816 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-02 23:03:01,819 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-02 23:03:01,867 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 88.0 percent of original size 81 [2021-05-02 23:03:01,894 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:03:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:03:01,911 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:03:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:03:01,927 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:03:01,944 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:03:01,944 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:03:01,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:03:01,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:03:01 BoogieIcfgContainer [2021-05-02 23:03:01,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:03:01,953 INFO L168 Benchmark]: Toolchain (without parser) took 3898.52 ms. Allocated memory was 198.2 MB in the beginning and 270.5 MB in the end (delta: 72.4 MB). Free memory was 163.4 MB in the beginning and 170.1 MB in the end (delta: -6.7 MB). Peak memory consumption was 66.5 MB. Max. memory is 8.0 GB. [2021-05-02 23:03:01,953 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 198.2 MB. Free memory was 180.1 MB in the beginning and 180.0 MB in the end (delta: 105.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:03:01,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.91 ms. Allocated memory is still 198.2 MB. Free memory was 163.2 MB in the beginning and 181.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:03:01,953 INFO L168 Benchmark]: Boogie Preprocessor took 43.99 ms. Allocated memory is still 198.2 MB. Free memory was 181.4 MB in the beginning and 180.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:03:01,954 INFO L168 Benchmark]: RCFGBuilder took 247.15 ms. Allocated memory is still 198.2 MB. Free memory was 180.4 MB in the beginning and 166.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:03:01,954 INFO L168 Benchmark]: TraceAbstraction took 3425.03 ms. Allocated memory was 198.2 MB in the beginning and 270.5 MB in the end (delta: 72.4 MB). Free memory was 165.7 MB in the beginning and 170.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 69.5 MB. Max. memory is 8.0 GB. [2021-05-02 23:03:01,954 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 198.2 MB. Free memory was 180.1 MB in the beginning and 180.0 MB in the end (delta: 105.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 175.91 ms. Allocated memory is still 198.2 MB. Free memory was 163.2 MB in the beginning and 181.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.99 ms. Allocated memory is still 198.2 MB. Free memory was 181.4 MB in the beginning and 180.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 247.15 ms. Allocated memory is still 198.2 MB. Free memory was 180.4 MB in the beginning and 166.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3425.03 ms. Allocated memory was 198.2 MB in the beginning and 270.5 MB in the end (delta: 72.4 MB). Free memory was 165.7 MB in the beginning and 170.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 69.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i