/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:25:04,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:25:04,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:25:04,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:25:04,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:25:04,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:25:04,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:25:04,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:25:04,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:25:04,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:25:04,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:25:04,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:25:04,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:25:04,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:25:04,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:25:04,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:25:04,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:25:04,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:25:04,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:25:04,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:25:04,207 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 11:25:04,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:25:04,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:25:04,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:25:04,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:25:04,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:25:04,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:25:04,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:25:04,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:25:04,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:25:04,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:25:04,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:25:04,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:25:04,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:25:04,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:25:04,225 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:25:04,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:25:04,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:25:04,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:25:04,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:25:04,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:25:04,509 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:25:04,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2021-05-06 11:25:04,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9a4993e/51cb2029054e49ecaec7b767808397f5/FLAGf5d21413c [2021-05-06 11:25:04,888 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:25:04,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2021-05-06 11:25:04,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9a4993e/51cb2029054e49ecaec7b767808397f5/FLAGf5d21413c [2021-05-06 11:25:04,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9a4993e/51cb2029054e49ecaec7b767808397f5 [2021-05-06 11:25:04,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:25:04,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:25:04,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:25:04,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:25:04,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:25:04,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:25:04" (1/1) ... [2021-05-06 11:25:04,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2334b620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:04, skipping insertion in model container [2021-05-06 11:25:04,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:25:04" (1/1) ... [2021-05-06 11:25:04,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:25:04,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:25:05,009 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c[322,335] [2021-05-06 11:25:05,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:25:05,020 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:25:05,027 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c[322,335] [2021-05-06 11:25:05,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:25:05,038 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:25:05,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05 WrapperNode [2021-05-06 11:25:05,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:25:05,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:25:05,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:25:05,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:25:05,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (1/1) ... [2021-05-06 11:25:05,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (1/1) ... [2021-05-06 11:25:05,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (1/1) ... [2021-05-06 11:25:05,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (1/1) ... [2021-05-06 11:25:05,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (1/1) ... [2021-05-06 11:25:05,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (1/1) ... [2021-05-06 11:25:05,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (1/1) ... [2021-05-06 11:25:05,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:25:05,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:25:05,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:25:05,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:25:05,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (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 11:25:05,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:25:05,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:25:05,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:25:05,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:25:05,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:25:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:25:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:25:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:25:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:25:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:25:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:25:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:25:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:25:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:25:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:25:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:25:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:25:05,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:25:05,354 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:25:05,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:25:05 BoogieIcfgContainer [2021-05-06 11:25:05,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:25:05,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:25:05,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:25:05,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:25:05,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:25:04" (1/3) ... [2021-05-06 11:25:05,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf62651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:25:05, skipping insertion in model container [2021-05-06 11:25:05,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:25:05" (2/3) ... [2021-05-06 11:25:05,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf62651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:25:05, skipping insertion in model container [2021-05-06 11:25:05,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:25:05" (3/3) ... [2021-05-06 11:25:05,360 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2021-05-06 11:25:05,364 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:25:05,383 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:25:05,394 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:25:05,408 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:25:05,408 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:25:05,408 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:25:05,408 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:25:05,424 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:25:05,425 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:25:05,425 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:25:05,425 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:25:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 11:25:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:25:05,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:05,441 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:05,441 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash 491760044, now seen corresponding path program 1 times [2021-05-06 11:25:05,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:05,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973552128] [2021-05-06 11:25:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:05,500 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,655 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 11:25:05,656 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:05,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973552128] [2021-05-06 11:25:05,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973552128] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:05,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:05,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:25:05,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915628302] [2021-05-06 11:25:05,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:25:05,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:05,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:25:05,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:25:05,670 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 11:25:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:05,705 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-06 11:25:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:25:05,706 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 11:25:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:05,710 INFO L225 Difference]: With dead ends: 30 [2021-05-06 11:25:05,710 INFO L226 Difference]: Without dead ends: 13 [2021-05-06 11:25:05,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:25:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-06 11:25:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-06 11:25:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-06 11:25:05,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-06 11:25:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:05,735 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-06 11:25:05,735 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 11:25:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-06 11:25:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:25:05,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:05,736 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:05,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:25:05,736 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash 482524834, now seen corresponding path program 1 times [2021-05-06 11:25:05,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:05,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132355882] [2021-05-06 11:25:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:05,739 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,821 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 11:25:05,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:05,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132355882] [2021-05-06 11:25:05,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [132355882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:05,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:05,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:25:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158746659] [2021-05-06 11:25:05,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:25:05,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:05,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:25:05,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:25:05,824 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:05,896 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-05-06 11:25:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:25:05,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:25:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:05,908 INFO L225 Difference]: With dead ends: 22 [2021-05-06 11:25:05,908 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 11:25:05,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:25:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 11:25:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 11:25:05,912 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 11:25:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 11:25:05,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-06 11:25:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:05,913 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 11:25:05,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 11:25:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 11:25:05,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:05,914 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:05,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:25:05,914 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash 925229631, now seen corresponding path program 1 times [2021-05-06 11:25:05,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:05,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79171074] [2021-05-06 11:25:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:05,964 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.1 percent of original size [2021-05-06 11:25:05,977 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:25:05,998 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-06 11:25:06,008 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.1 percent of original size 48 [2021-05-06 11:25:06,024 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:25:06,027 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:25:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:06,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:06,129 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 11:25:06,189 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79171074] [2021-05-06 11:25:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [79171074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:06,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:06,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:25:06,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658615517] [2021-05-06 11:25:06,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:25:06,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:25:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:25:06,191 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:06,296 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 11:25:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:25:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 11:25:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:06,297 INFO L225 Difference]: With dead ends: 22 [2021-05-06 11:25:06,297 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 11:25:06,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:25:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 11:25:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 11:25:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 11:25:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 11:25:06,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2021-05-06 11:25:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:06,302 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 11:25:06,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 11:25:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 11:25:06,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:06,302 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:06,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:25:06,303 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:06,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1220035546, now seen corresponding path program 1 times [2021-05-06 11:25:06,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:06,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669576640] [2021-05-06 11:25:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:06,317 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.1 percent of original size [2021-05-06 11:25:06,326 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:25:06,338 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-06 11:25:06,347 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.1 percent of original size 48 [2021-05-06 11:25:06,360 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:25:06,387 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 94.6 percent of original size [2021-05-06 11:25:06,391 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:25:06,407 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:25:06,701 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 1 [2021-05-06 11:25:06,720 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-05-06 11:25:06,728 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-06 11:25:06,820 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 94.6 percent of original size 70 [2021-05-06 11:25:06,845 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:25:06,861 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:25:06,874 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 94.7 percent of original size [2021-05-06 11:25:06,891 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:25:06,894 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:25:06,930 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-06 11:25:06,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:25:06,955 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 94.7 percent of original size 72 [2021-05-06 11:25:06,969 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:25:06,972 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:25:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:25:07,029 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:25:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:25:07,068 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:25:07,087 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-06 11:25:07,087 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 11:25:07,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:25:07,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:25:07 BoogieIcfgContainer [2021-05-06 11:25:07,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:25:07,102 INFO L168 Benchmark]: Toolchain (without parser) took 2190.37 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 173.3 MB in the beginning and 198.8 MB in the end (delta: -25.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:25:07,102 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 207.6 MB. Free memory is still 189.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:25:07,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.48 ms. Allocated memory is still 207.6 MB. Free memory was 173.2 MB in the beginning and 164.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:25:07,104 INFO L168 Benchmark]: Boogie Preprocessor took 63.49 ms. Allocated memory is still 207.6 MB. Free memory was 163.9 MB in the beginning and 191.5 MB in the end (delta: -27.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:25:07,105 INFO L168 Benchmark]: RCFGBuilder took 252.69 ms. Allocated memory is still 207.6 MB. Free memory was 191.5 MB in the beginning and 178.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:25:07,106 INFO L168 Benchmark]: TraceAbstraction took 1745.16 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 178.2 MB in the beginning and 198.8 MB in the end (delta: -20.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:25:07,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 207.6 MB. Free memory is still 189.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 124.48 ms. Allocated memory is still 207.6 MB. Free memory was 173.2 MB in the beginning and 164.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.49 ms. Allocated memory is still 207.6 MB. Free memory was 163.9 MB in the beginning and 191.5 MB in the end (delta: -27.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 252.69 ms. Allocated memory is still 207.6 MB. Free memory was 191.5 MB in the beginning and 178.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1745.16 ms. Allocated memory was 207.6 MB in the beginning and 249.6 MB in the end (delta: 41.9 MB). Free memory was 178.2 MB in the beginning and 198.8 MB in the end (delta: -20.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L15] COND TRUE x < 0x0fffffff [L16] COND TRUE x < 0xfff1 [L17] x++ [L15] COND TRUE x < 0x0fffffff [L16] COND FALSE !(x < 0xfff1) [L19] x += 2 [L15] COND FALSE !(x < 0x0fffffff) [L23] CALL __VERIFIER_assert(!(x % 2)) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1686.2ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 8.6ms, AutomataDifference: 242.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 31 SDslu, 17 SDs, 0 SdLazy, 33 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 251.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...