/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/nec11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 11:50:16,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 11:50:16,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 11:50:16,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 11:50:16,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 11:50:16,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 11:50:16,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 11:50:16,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 11:50:16,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 11:50:16,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 11:50:16,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 11:50:16,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 11:50:16,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 11:50:16,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 11:50:16,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 11:50:16,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 11:50:16,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 11:50:16,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 11:50:16,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 11:50:16,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 11:50:16,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 11:50:16,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 11:50:16,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 11:50:16,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 11:50:16,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 11:50:16,548 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 11:50:16,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 11:50:16,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 11:50:16,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 11:50:16,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 11:50:16,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 11:50:16,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 11:50:16,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 11:50:16,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 11:50:16,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 11:50:16,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 11:50:16,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 11:50:16,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 11:50:16,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 11:50:16,854 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 11:50:16,855 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 11:50:16,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec11.c [2021-05-02 11:50:16,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f4bc816/08cf69016e1a4c60b6fd5f2c089c4172/FLAG94ff92b3c [2021-05-02 11:50:17,199 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 11:50:17,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec11.c [2021-05-02 11:50:17,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f4bc816/08cf69016e1a4c60b6fd5f2c089c4172/FLAG94ff92b3c [2021-05-02 11:50:17,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f4bc816/08cf69016e1a4c60b6fd5f2c089c4172 [2021-05-02 11:50:17,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 11:50:17,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 11:50:17,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 11:50:17,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 11:50:17,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 11:50:17,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177df6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17, skipping insertion in model container [2021-05-02 11:50:17,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 11:50:17,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 11:50:17,765 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/nec11.c[317,330] [2021-05-02 11:50:17,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:50:17,776 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 11:50:17,783 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/nec11.c[317,330] [2021-05-02 11:50:17,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:50:17,793 INFO L208 MainTranslator]: Completed translation [2021-05-02 11:50:17,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17 WrapperNode [2021-05-02 11:50:17,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 11:50:17,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 11:50:17,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 11:50:17,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 11:50:17,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (1/1) ... [2021-05-02 11:50:17,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 11:50:17,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 11:50:17,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 11:50:17,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 11:50:17,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (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 11:50:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 11:50:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 11:50:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 11:50:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 11:50:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 11:50:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 11:50:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 11:50:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 11:50:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 11:50:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 11:50:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 11:50:18,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 11:50:18,189 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 11:50:18,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:50:18 BoogieIcfgContainer [2021-05-02 11:50:18,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 11:50:18,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 11:50:18,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 11:50:18,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 11:50:18,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:50:17" (1/3) ... [2021-05-02 11:50:18,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e553102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:50:18, skipping insertion in model container [2021-05-02 11:50:18,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:17" (2/3) ... [2021-05-02 11:50:18,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e553102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:50:18, skipping insertion in model container [2021-05-02 11:50:18,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:50:18" (3/3) ... [2021-05-02 11:50:18,194 INFO L111 eAbstractionObserver]: Analyzing ICFG nec11.c [2021-05-02 11:50:18,219 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 11:50:18,221 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 11:50:18,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 11:50:18,263 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 11:50:18,263 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 11:50:18,264 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 11:50:18,264 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 11:50:18,264 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 11:50:18,264 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 11:50:18,264 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 11:50:18,264 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 11:50:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:50:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 11:50:18,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:18,282 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:18,282 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:18,286 INFO L82 PathProgramCache]: Analyzing trace with hash 536722933, now seen corresponding path program 1 times [2021-05-02 11:50:18,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:18,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587576901] [2021-05-02 11:50:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:18,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:18,507 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 11:50:18,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:18,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587576901] [2021-05-02 11:50:18,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587576901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:50:18,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:50:18,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 11:50:18,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381610417] [2021-05-02 11:50:18,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 11:50:18,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 11:50:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:50:18,531 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:18,579 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-02 11:50:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 11:50:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 11:50:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:18,585 INFO L225 Difference]: With dead ends: 33 [2021-05-02 11:50:18,586 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 11:50:18,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:50:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 11:50:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 11:50:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-02 11:50:18,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-02 11:50:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:18,614 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-02 11:50:18,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-02 11:50:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 11:50:18,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:18,616 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:18,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 11:50:18,616 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash 526564202, now seen corresponding path program 1 times [2021-05-02 11:50:18,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:18,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478265158] [2021-05-02 11:50:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 11:50:18,641 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 11:50:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 11:50:18,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 11:50:18,683 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 11:50:18,683 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 11:50:18,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 11:50:18,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:50:18 BoogieIcfgContainer [2021-05-02 11:50:18,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 11:50:18,707 INFO L168 Benchmark]: Toolchain (without parser) took 1045.37 ms. Allocated memory is still 201.3 MB. Free memory was 166.6 MB in the beginning and 142.0 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:18,708 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 11:50:18,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.16 ms. Allocated memory is still 201.3 MB. Free memory was 166.4 MB in the beginning and 157.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:18,710 INFO L168 Benchmark]: Boogie Preprocessor took 29.39 ms. Allocated memory is still 201.3 MB. Free memory was 157.1 MB in the beginning and 185.2 MB in the end (delta: -28.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:18,711 INFO L168 Benchmark]: RCFGBuilder took 365.24 ms. Allocated memory is still 201.3 MB. Free memory was 185.2 MB in the beginning and 171.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:18,712 INFO L168 Benchmark]: TraceAbstraction took 514.88 ms. Allocated memory is still 201.3 MB. Free memory was 171.3 MB in the beginning and 142.0 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:18,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 128.16 ms. Allocated memory is still 201.3 MB. Free memory was 166.4 MB in the beginning and 157.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.39 ms. Allocated memory is still 201.3 MB. Free memory was 157.1 MB in the beginning and 185.2 MB in the end (delta: -28.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 365.24 ms. Allocated memory is still 201.3 MB. Free memory was 185.2 MB in the beginning and 171.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 514.88 ms. Allocated memory is still 201.3 MB. Free memory was 171.3 MB in the beginning and 142.0 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 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: [L15] int a[5]; [L16] int len=0; [L17] _Bool c=__VERIFIER_nondet_bool(); [L18] int i; VAL [c=0, len=0] [L21] COND FALSE !(\read(c)) VAL [c=0, len=0] [L30] CALL __VERIFIER_assert(len==5) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 422.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.9ms, AutomataDifference: 66.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20 SDtfs, 13 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.6ms SsaConstructionTime, 46.4ms SatisfiabilityAnalysisTime, 133.3ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 40 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...