/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/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:19:40,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:19:40,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:19:40,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:19:40,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:19:40,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:19:40,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:19:40,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:19:40,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:19:40,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:19:40,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:19:40,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:19:40,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:19:40,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:19:40,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:19:40,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:19:40,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:19:40,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:19:40,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:19:40,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:19:40,703 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 11:19:40,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:19:40,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:19:40,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:19:40,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:19:40,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:19:40,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:19:40,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:19:40,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:19:40,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:19:40,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:19:40,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:19:40,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:19:40,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:19:40,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:19:40,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:19:40,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:19:40,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:19:40,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:19:40,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:19:40,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:19:40,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:19:40,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:19:40,720 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:19:40,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:19:40,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:19:40,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:19:40,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:19:40,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:19:40,996 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:19:40,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2021-05-06 11:19:41,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f4a0f513/0675a86dc6114aeebbc3d7fafff32c3a/FLAG1b9201ada [2021-05-06 11:19:41,540 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:19:41,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2021-05-06 11:19:41,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f4a0f513/0675a86dc6114aeebbc3d7fafff32c3a/FLAG1b9201ada [2021-05-06 11:19:42,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f4a0f513/0675a86dc6114aeebbc3d7fafff32c3a [2021-05-06 11:19:42,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:19:42,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:19:42,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:19:42,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:19:42,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:19:42,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b19d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42, skipping insertion in model container [2021-05-06 11:19:42,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:19:42,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:19:42,143 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/sum_array-1.c[363,376] [2021-05-06 11:19:42,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:19:42,159 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:19:42,166 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/sum_array-1.c[363,376] [2021-05-06 11:19:42,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:19:42,227 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:19:42,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42 WrapperNode [2021-05-06 11:19:42,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:19:42,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:19:42,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:19:42,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:19:42,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (1/1) ... [2021-05-06 11:19:42,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:19:42,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:19:42,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:19:42,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:19:42,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (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 11:19:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:19:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:19:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:19:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:19:42,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:19:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:19:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:19:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:19:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:19:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:19:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:19:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-06 11:19:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:19:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:19:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:19:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:19:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:19:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:19:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:19:42,598 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:19:42,598 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-06 11:19:42,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:19:42 BoogieIcfgContainer [2021-05-06 11:19:42,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:19:42,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:19:42,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:19:42,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:19:42,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:19:42" (1/3) ... [2021-05-06 11:19:42,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f41e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:19:42, skipping insertion in model container [2021-05-06 11:19:42,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:19:42" (2/3) ... [2021-05-06 11:19:42,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f41e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:19:42, skipping insertion in model container [2021-05-06 11:19:42,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:19:42" (3/3) ... [2021-05-06 11:19:42,606 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2021-05-06 11:19:42,610 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:19:42,612 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:19:42,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:19:42,648 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:19:42,648 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:19:42,648 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:19:42,648 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:19:42,648 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:19:42,648 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:19:42,648 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:19:42,648 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:19:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 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 11:19:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:19:42,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:42,674 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:42,674 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 955945954, now seen corresponding path program 1 times [2021-05-06 11:19:42,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:42,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926534789] [2021-05-06 11:19:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:42,755 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:19:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:42,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:19:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:19:43,007 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 11:19:43,008 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:19:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926534789] [2021-05-06 11:19:43,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [926534789] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:19:43,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:19:43,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:19:43,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154987015] [2021-05-06 11:19:43,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:19:43,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:19:43,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:19:43,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:19:43,042 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 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 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:19:43,150 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-05-06 11:19:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:19:43,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 11:19:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:19:43,156 INFO L225 Difference]: With dead ends: 71 [2021-05-06 11:19:43,156 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 11:19:43,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:19:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 11:19:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-05-06 11:19:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:19:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 11:19:43,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2021-05-06 11:19:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:19:43,181 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 11:19:43,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:19:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 11:19:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 11:19:43,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:19:43,182 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:19:43,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:19:43,182 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:19:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:19:43,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1073067556, now seen corresponding path program 1 times [2021-05-06 11:19:43,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:19:43,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262718745] [2021-05-06 11:19:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:19:43,195 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:19:43,195 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:19:43,197 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:19:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:19:43,229 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:19:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:19:43,256 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:19:43,271 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-06 11:19:43,271 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 11:19:43,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:19:43,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:19:43 BoogieIcfgContainer [2021-05-06 11:19:43,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:19:43,281 INFO L168 Benchmark]: Toolchain (without parser) took 1233.41 ms. Allocated memory is still 177.2 MB. Free memory was 141.5 MB in the beginning and 124.6 MB in the end (delta: 16.9 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:43,282 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:19:43,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.85 ms. Allocated memory is still 177.2 MB. Free memory was 141.3 MB in the beginning and 160.5 MB in the end (delta: -19.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:43,283 INFO L168 Benchmark]: Boogie Preprocessor took 41.74 ms. Allocated memory is still 177.2 MB. Free memory was 160.5 MB in the beginning and 159.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:43,283 INFO L168 Benchmark]: RCFGBuilder took 328.63 ms. Allocated memory is still 177.2 MB. Free memory was 158.8 MB in the beginning and 141.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:43,283 INFO L168 Benchmark]: TraceAbstraction took 680.51 ms. Allocated memory is still 177.2 MB. Free memory was 141.2 MB in the beginning and 124.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:19:43,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 175.85 ms. Allocated memory is still 177.2 MB. Free memory was 141.3 MB in the beginning and 160.5 MB in the end (delta: -19.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.74 ms. Allocated memory is still 177.2 MB. Free memory was 160.5 MB in the beginning and 159.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.63 ms. Allocated memory is still 177.2 MB. Free memory was 158.8 MB in the beginning and 141.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 680.51 ms. Allocated memory is still 177.2 MB. Free memory was 141.2 MB in the beginning and 124.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] unsigned int M = __VERIFIER_nondet_uint(); [L17] int A[M], B[M], C[M]; [L18] unsigned int i; [L20] i=0 [L20] COND TRUE i