/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-c225d54 [2021-05-02 23:15:28,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:15:28,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:15:28,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:15:28,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:15:28,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:15:28,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:15:28,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:15:28,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:15:28,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:15:28,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:15:28,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:15:28,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:15:28,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:15:28,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:15:28,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:15:28,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:15:28,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:15:28,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:15:28,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:15:28,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:15:28,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:15:28,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:15:28,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:15:28,821 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:15:28,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:15:28,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:15:28,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:15:28,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:15:28,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:15:28,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:15:28,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:15:28,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:28,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:15:28,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:15:28,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:15:28,823 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:15:28,823 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:15:29,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:15:29,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:15:29,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:15:29,092 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:15:29,093 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:15:29,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2021-05-02 23:15:29,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f94edc92b/e27b244b31d548b4a41e46024d8ea8a9/FLAGdfa25720d [2021-05-02 23:15:29,656 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:15:29,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2021-05-02 23:15:29,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f94edc92b/e27b244b31d548b4a41e46024d8ea8a9/FLAGdfa25720d [2021-05-02 23:15:30,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f94edc92b/e27b244b31d548b4a41e46024d8ea8a9 [2021-05-02 23:15:30,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:15:30,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:15:30,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:30,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:15:30,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:15:30,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468e66f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30, skipping insertion in model container [2021-05-02 23:15:30,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:15:30,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:15:30,187 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] [2021-05-02 23:15:30,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:30,203 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:15:30,214 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] [2021-05-02 23:15:30,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:30,247 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:15:30,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30 WrapperNode [2021-05-02 23:15:30,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:30,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:15:30,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:15:30,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:15:30,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... [2021-05-02 23:15:30,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:15:30,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:15:30,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:15:30,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:15:30,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:15:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:15:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:15:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:15:30,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:15:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:15:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:15:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:15:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:15:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:15:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:15:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 23:15:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:15:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:15:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:15:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:15:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:15:30,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:15:30,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:15:30,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:15:30,725 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 23:15:30,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:30 BoogieIcfgContainer [2021-05-02 23:15:30,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:15:30,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:15:30,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:15:30,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:15:30,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:15:30" (1/3) ... [2021-05-02 23:15:30,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e72039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:30, skipping insertion in model container [2021-05-02 23:15:30,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:30" (2/3) ... [2021-05-02 23:15:30,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e72039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:30, skipping insertion in model container [2021-05-02 23:15:30,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:30" (3/3) ... [2021-05-02 23:15:30,732 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2021-05-02 23:15:30,738 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:15:30,740 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:15:30,752 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:15:30,776 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:15:30,776 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:15:30,776 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:15:30,776 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:15:30,776 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:15:30,777 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:15:30,777 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:15:30,777 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:15:30,790 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) [2021-05-02 23:15:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:15:30,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:30,799 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:30,799 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:30,804 INFO L82 PathProgramCache]: Analyzing trace with hash 955945954, now seen corresponding path program 1 times [2021-05-02 23:15:30,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:30,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830140455] [2021-05-02 23:15:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:30,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:31,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:31,024 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:31,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830140455] [2021-05-02 23:15:31,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830140455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:31,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:31,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:15:31,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623429510] [2021-05-02 23:15:31,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:15:31,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:15:31,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:31,040 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) [2021-05-02 23:15:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:31,303 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-05-02 23:15:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:15:31,305 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 [2021-05-02 23:15:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:31,311 INFO L225 Difference]: With dead ends: 71 [2021-05-02 23:15:31,311 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:15:31,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:15:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:15:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-05-02 23:15:31,346 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) [2021-05-02 23:15:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 23:15:31,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2021-05-02 23:15:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:31,349 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 23:15:31,349 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) [2021-05-02 23:15:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 23:15:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:15:31,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:31,350 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] [2021-05-02 23:15:31,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:15:31,351 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:31,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1073067556, now seen corresponding path program 1 times [2021-05-02 23:15:31,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:31,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322913723] [2021-05-02 23:15:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:31,373 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:31,377 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:15:31,465 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:15:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:15:31,568 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:15:31,603 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:15:31,603 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:15:31,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:15:31,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:15:31 BoogieIcfgContainer [2021-05-02 23:15:31,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:15:31,617 INFO L168 Benchmark]: Toolchain (without parser) took 1532.51 ms. Allocated memory is still 180.4 MB. Free memory was 146.2 MB in the beginning and 159.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 59.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:31,618 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 163.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:15:31,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.31 ms. Allocated memory is still 180.4 MB. Free memory was 146.0 MB in the beginning and 136.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:31,620 INFO L168 Benchmark]: Boogie Preprocessor took 46.64 ms. Allocated memory is still 180.4 MB. Free memory was 136.2 MB in the beginning and 134.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:31,620 INFO L168 Benchmark]: RCFGBuilder took 430.33 ms. Allocated memory is still 180.4 MB. Free memory was 134.4 MB in the beginning and 147.4 MB in the end (delta: -13.0 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:31,621 INFO L168 Benchmark]: TraceAbstraction took 887.60 ms. Allocated memory is still 180.4 MB. Free memory was 146.9 MB in the beginning and 159.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:31,626 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 180.4 MB. Free memory is still 163.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 159.31 ms. Allocated memory is still 180.4 MB. Free memory was 146.0 MB in the beginning and 136.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.64 ms. Allocated memory is still 180.4 MB. Free memory was 136.2 MB in the beginning and 134.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 430.33 ms. Allocated memory is still 180.4 MB. Free memory was 134.4 MB in the beginning and 147.4 MB in the end (delta: -13.0 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 887.60 ms. Allocated memory is still 180.4 MB. Free memory was 146.9 MB in the beginning and 159.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 58.7 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