/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-6253b08 [2021-05-06 11:10:04,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:10:04,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:10:04,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:10:04,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:10:04,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:10:04,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:10:04,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:10:04,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:10:04,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:10:04,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:10:04,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:10:04,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:10:04,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:10:04,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:10:04,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:10:04,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:10:04,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:10:04,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:10:04,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:10:04,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:10:04,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:10:04,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:10:04,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:10:04,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:10:04,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:10:04,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:10:04,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:10:04,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:10:04,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:10:04,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:10:04,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:10:04,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:10:04,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:10:04,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:10:04,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:10:04,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:10:04,100 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:10:04,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:10:04,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:10:04,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:10:04,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:10:04,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:10:04,100 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:10:04,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:10:04,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:10:04,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:10:04,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:10:04,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:10:04,454 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:10:04,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2021-05-06 11:10:04,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2c1b081/4da6580f420249269c1a027d338b5078/FLAG387fb9b9d [2021-05-06 11:10:04,984 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:10:04,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2021-05-06 11:10:04,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2c1b081/4da6580f420249269c1a027d338b5078/FLAG387fb9b9d [2021-05-06 11:10:05,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2c1b081/4da6580f420249269c1a027d338b5078 [2021-05-06 11:10:05,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:10:05,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:10:05,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:10:05,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:10:05,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:10:05,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc46ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05, skipping insertion in model container [2021-05-06 11:10:05,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:10:05,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:10:05,560 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] [2021-05-06 11:10:05,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:10:05,577 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:10:05,620 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] [2021-05-06 11:10:05,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:10:05,644 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:10:05,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05 WrapperNode [2021-05-06 11:10:05,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:10:05,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:10:05,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:10:05,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:10:05,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (1/1) ... [2021-05-06 11:10:05,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:10:05,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:10:05,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:10:05,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:10:05,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (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 [2021-05-06 11:10:05,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:10:05,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:10:05,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:10:05,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:10:05,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:10:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:10:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:10:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:10:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:10:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:10:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:10:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:10:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-06 11:10:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:10:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:10:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:10:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:10:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:10:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:10:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:10:06,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:10:06,010 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:10:06,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:10:06 BoogieIcfgContainer [2021-05-06 11:10:06,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:10:06,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:10:06,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:10:06,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:10:06,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:10:05" (1/3) ... [2021-05-06 11:10:06,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ee66e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:10:06, skipping insertion in model container [2021-05-06 11:10:06,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:10:05" (2/3) ... [2021-05-06 11:10:06,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ee66e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:10:06, skipping insertion in model container [2021-05-06 11:10:06,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:10:06" (3/3) ... [2021-05-06 11:10:06,031 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-05-06 11:10:06,035 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:10:06,038 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:10:06,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:10:06,088 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:10:06,088 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:10:06,088 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:10:06,088 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:10:06,113 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:10:06,113 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:10:06,113 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:10:06,113 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:10:06,137 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) [2021-05-06 11:10:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:10:06,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:10:06,144 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:10:06,144 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:10:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:10:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash -872495525, now seen corresponding path program 1 times [2021-05-06 11:10:06,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:10:06,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112679553] [2021-05-06 11:10:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:10:06,233 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:10:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:06,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:10:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:10:06,403 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:10:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112679553] [2021-05-06 11:10:06,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112679553] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:10:06,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:10:06,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:10:06,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089021003] [2021-05-06 11:10:06,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:10:06,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:10:06,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:10:06,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:10:06,421 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) [2021-05-06 11:10:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:10:06,480 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 11:10:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:10:06,482 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 [2021-05-06 11:10:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:10:06,486 INFO L225 Difference]: With dead ends: 32 [2021-05-06 11:10:06,486 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 11:10:06,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:10:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 11:10:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 11:10:06,520 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) [2021-05-06 11:10:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 11:10:06,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-06 11:10:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:10:06,522 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 11:10:06,522 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) [2021-05-06 11:10:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 11:10:06,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:10:06,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:10:06,524 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:10:06,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:10:06,524 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:10:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:10:06,525 INFO L82 PathProgramCache]: Analyzing trace with hash -884501298, now seen corresponding path program 1 times [2021-05-06 11:10:06,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:10:06,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581205847] [2021-05-06 11:10:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:10:06,537 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:10:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:06,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:10:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:10:06,672 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:10:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581205847] [2021-05-06 11:10:06,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [581205847] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:10:06,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:10:06,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:10:06,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327881986] [2021-05-06 11:10:06,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:10:06,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:10:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:10:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:10:06,675 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) [2021-05-06 11:10:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:10:06,833 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-06 11:10:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:10:06,834 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 [2021-05-06 11:10:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:10:06,835 INFO L225 Difference]: With dead ends: 24 [2021-05-06 11:10:06,835 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 11:10:06,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:10:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 11:10:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 11:10:06,850 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) [2021-05-06 11:10:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 11:10:06,851 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2021-05-06 11:10:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:10:06,851 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 11:10:06,852 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) [2021-05-06 11:10:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 11:10:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 11:10:06,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:10:06,853 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:10:06,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:10:06,854 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:10:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:10:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash 60854025, now seen corresponding path program 1 times [2021-05-06 11:10:06,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:10:06,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198295770] [2021-05-06 11:10:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:10:06,927 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 89.7 percent of original size [2021-05-06 11:10:06,937 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:06,956 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:06,990 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-06 11:10:07,002 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-06 11:10:07,056 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 89.7 percent of original size 78 [2021-05-06 11:10:07,082 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:10:07,086 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:10:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:10:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:10:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:10:07,463 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:10:07,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198295770] [2021-05-06 11:10:07,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198295770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:10:07,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:10:07,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:10:07,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112948392] [2021-05-06 11:10:07,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:10:07,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:10:07,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:10:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:10:07,469 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) [2021-05-06 11:10:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:10:08,058 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-06 11:10:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:10:08,058 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 [2021-05-06 11:10:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:10:08,059 INFO L225 Difference]: With dead ends: 33 [2021-05-06 11:10:08,059 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 11:10:08,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 692.1ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:10:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 11:10:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-05-06 11:10:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2021-05-06 11:10:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 11:10:08,067 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2021-05-06 11:10:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:10:08,067 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 11:10:08,068 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) [2021-05-06 11:10:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 11:10:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 11:10:08,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:10:08,068 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:10:08,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:10:08,069 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:10:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:10:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash -437367422, now seen corresponding path program 1 times [2021-05-06 11:10:08,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:10:08,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802204449] [2021-05-06 11:10:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:10:08,088 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.2 percent of original size [2021-05-06 11:10:08,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:08,095 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:08,116 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-06 11:10:08,124 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-06 11:10:08,172 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.2 percent of original size 83 [2021-05-06 11:10:08,196 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:10:08,200 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:10:08,212 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 89.7 percent of original size [2021-05-06 11:10:08,214 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:08,218 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:08,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-06 11:10:08,241 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-06 11:10:08,286 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 89.7 percent of original size 78 [2021-05-06 11:10:08,310 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:10:08,319 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 88.3 percent of original size [2021-05-06 11:10:08,343 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:08,346 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:10:08,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-06 11:10:08,364 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-06 11:10:08,379 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 88.3 percent of original size 68 [2021-05-06 11:10:08,398 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:10:08,400 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:10:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:10:08,424 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:10:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:10:08,440 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:10:08,456 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-06 11:10:08,456 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 11:10:08,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:10:08,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:10:08 BoogieIcfgContainer [2021-05-06 11:10:08,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:10:08,469 INFO L168 Benchmark]: Toolchain (without parser) took 3077.27 ms. Allocated memory was 191.9 MB in the beginning and 233.8 MB in the end (delta: 41.9 MB). Free memory was 156.1 MB in the beginning and 123.2 MB in the end (delta: 32.9 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. [2021-05-06 11:10:08,469 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 172.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:10:08,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.83 ms. Allocated memory is still 191.9 MB. Free memory was 155.8 MB in the beginning and 174.5 MB in the end (delta: -18.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:10:08,469 INFO L168 Benchmark]: Boogie Preprocessor took 25.01 ms. Allocated memory is still 191.9 MB. Free memory was 174.5 MB in the beginning and 173.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:10:08,470 INFO L168 Benchmark]: RCFGBuilder took 354.55 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 158.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:10:08,470 INFO L168 Benchmark]: TraceAbstraction took 2440.59 ms. Allocated memory was 191.9 MB in the beginning and 233.8 MB in the end (delta: 41.9 MB). Free memory was 157.8 MB in the beginning and 123.2 MB in the end (delta: 34.5 MB). Peak memory consumption was 78.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:10:08,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 172.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.83 ms. Allocated memory is still 191.9 MB. Free memory was 155.8 MB in the beginning and 174.5 MB in the end (delta: -18.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.01 ms. Allocated memory is still 191.9 MB. Free memory was 174.5 MB in the beginning and 173.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 354.55 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 158.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2440.59 ms. Allocated memory was 191.9 MB in the beginning and 233.8 MB in the end (delta: 41.9 MB). Free memory was 157.8 MB in the beginning and 123.2 MB in the end (delta: 34.5 MB). Peak memory consumption was 78.0 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