/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/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 11:49:46,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 11:49:46,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 11:49:46,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 11:49:46,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 11:49:46,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 11:49:46,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 11:49:46,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 11:49:46,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 11:49:46,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 11:49:46,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 11:49:46,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 11:49:46,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 11:49:46,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 11:49:46,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 11:49:46,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 11:49:46,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 11:49:46,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 11:49:46,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 11:49:46,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 11:49:46,320 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 11:49:46,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 11:49:46,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 11:49:46,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 11:49:46,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 11:49:46,358 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 11:49:46,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 11:49:46,359 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 11:49:46,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 11:49:46,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 11:49:46,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 11:49:46,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 11:49:46,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 11:49:46,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 11:49:46,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 11:49:46,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 11:49:46,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 11:49:46,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 11:49:46,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 11:49:46,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 11:49:46,813 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 11:49:46,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2021-05-02 11:49:46,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a17ebba7/d6faba3804c04dab8aa5d126ea9df0b9/FLAG6ee8e3ff5 [2021-05-02 11:49:47,521 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 11:49:47,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-2.c [2021-05-02 11:49:47,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a17ebba7/d6faba3804c04dab8aa5d126ea9df0b9/FLAG6ee8e3ff5 [2021-05-02 11:49:47,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a17ebba7/d6faba3804c04dab8aa5d126ea9df0b9 [2021-05-02 11:49:47,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 11:49:47,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 11:49:47,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 11:49:47,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 11:49:47,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 11:49:47,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:47" (1/1) ... [2021-05-02 11:49:47,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a18a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:47, skipping insertion in model container [2021-05-02 11:49:47,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:47" (1/1) ... [2021-05-02 11:49:47,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 11:49:47,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 11:49:48,080 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/array-2.c[319,332] [2021-05-02 11:49:48,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:49:48,120 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 11:49:48,127 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/array-2.c[319,332] [2021-05-02 11:49:48,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:49:48,142 INFO L208 MainTranslator]: Completed translation [2021-05-02 11:49:48,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48 WrapperNode [2021-05-02 11:49:48,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 11:49:48,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 11:49:48,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 11:49:48,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 11:49:48,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (1/1) ... [2021-05-02 11:49:48,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (1/1) ... [2021-05-02 11:49:48,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (1/1) ... [2021-05-02 11:49:48,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (1/1) ... [2021-05-02 11:49:48,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (1/1) ... [2021-05-02 11:49:48,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (1/1) ... [2021-05-02 11:49:48,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (1/1) ... [2021-05-02 11:49:48,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 11:49:48,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 11:49:48,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 11:49:48,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 11:49:48,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (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 11:49:48,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 11:49:48,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 11:49:48,362 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 11:49:48,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 11:49:48,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 11:49:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 11:49:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 11:49:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 11:49:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 11:49:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 11:49:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 11:49:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 11:49:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 11:49:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 11:49:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 11:49:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 11:49:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 11:49:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 11:49:48,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 11:49:48,651 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 11:49:48,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:48 BoogieIcfgContainer [2021-05-02 11:49:48,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 11:49:48,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 11:49:48,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 11:49:48,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 11:49:48,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:49:47" (1/3) ... [2021-05-02 11:49:48,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b17996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:48, skipping insertion in model container [2021-05-02 11:49:48,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:48" (2/3) ... [2021-05-02 11:49:48,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b17996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:48, skipping insertion in model container [2021-05-02 11:49:48,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:48" (3/3) ... [2021-05-02 11:49:48,681 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2021-05-02 11:49:48,694 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 11:49:48,697 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 11:49:48,707 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 11:49:48,745 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 11:49:48,746 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 11:49:48,746 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 11:49:48,746 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 11:49:48,746 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 11:49:48,746 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 11:49:48,746 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 11:49:48,746 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 11:49:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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 11:49:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 11:49:48,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:48,787 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:48,788 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -588233041, now seen corresponding path program 1 times [2021-05-02 11:49:48,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:48,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269280695] [2021-05-02 11:49:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:48,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:49,003 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 11:49:49,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:49,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269280695] [2021-05-02 11:49:49,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269280695] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:49,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:49:49,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 11:49:49,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915478566] [2021-05-02 11:49:49,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 11:49:49,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 11:49:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:49:49,017 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 11:49:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:49,055 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 11:49:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 11:49:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 11:49:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:49,060 INFO L225 Difference]: With dead ends: 35 [2021-05-02 11:49:49,060 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 11:49:49,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:49:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 11:49:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 11:49:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 11:49:49,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 11:49:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:49,083 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 11:49:49,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 11:49:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 11:49:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 11:49:49,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:49,084 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:49,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 11:49:49,084 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash -903153702, now seen corresponding path program 1 times [2021-05-02 11:49:49,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:49,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721595289] [2021-05-02 11:49:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:49,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:49,190 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 11:49:49,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:49,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721595289] [2021-05-02 11:49:49,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721595289] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:49,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:49:49,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 11:49:49,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661979145] [2021-05-02 11:49:49,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 11:49:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 11:49:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:49:49,193 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 11:49:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:49,221 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-02 11:49:49,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 11:49:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 11:49:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:49,222 INFO L225 Difference]: With dead ends: 24 [2021-05-02 11:49:49,222 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 11:49:49,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:49:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 11:49:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-05-02 11:49:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 11:49:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 11:49:49,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-05-02 11:49:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:49,226 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 11:49:49,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 11:49:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 11:49:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 11:49:49,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:49,227 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:49,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 11:49:49,227 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1274683932, now seen corresponding path program 1 times [2021-05-02 11:49:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:49,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747945394] [2021-05-02 11:49:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 11:49:49,252 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 11:49:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 11:49:49,298 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 11:49:49,337 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 11:49:49,337 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 11:49:49,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 11:49:49,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:49:49 BoogieIcfgContainer [2021-05-02 11:49:49,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 11:49:49,372 INFO L168 Benchmark]: Toolchain (without parser) took 1503.00 ms. Allocated memory is still 163.6 MB. Free memory was 127.6 MB in the beginning and 78.8 MB in the end (delta: 48.7 MB). Peak memory consumption was 49.0 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:49,373 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 163.6 MB. Free memory is still 144.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 11:49:49,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.15 ms. Allocated memory is still 163.6 MB. Free memory was 127.4 MB in the beginning and 117.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:49,374 INFO L168 Benchmark]: Boogie Preprocessor took 92.58 ms. Allocated memory is still 163.6 MB. Free memory was 117.8 MB in the beginning and 146.5 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:49,376 INFO L168 Benchmark]: RCFGBuilder took 414.48 ms. Allocated memory is still 163.6 MB. Free memory was 146.5 MB in the beginning and 131.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:49,376 INFO L168 Benchmark]: TraceAbstraction took 717.90 ms. Allocated memory is still 163.6 MB. Free memory was 130.7 MB in the beginning and 78.8 MB in the end (delta: 51.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:49,380 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 163.6 MB. Free memory is still 144.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.15 ms. Allocated memory is still 163.6 MB. Free memory was 127.4 MB in the beginning and 117.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 92.58 ms. Allocated memory is still 163.6 MB. Free memory was 117.8 MB in the beginning and 146.5 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 414.48 ms. Allocated memory is still 163.6 MB. Free memory was 146.5 MB in the beginning and 131.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 717.90 ms. Allocated memory is still 163.6 MB. Free memory was 130.7 MB in the beginning and 78.8 MB in the end (delta: 51.9 MB). Peak memory consumption was 52.4 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] unsigned int SIZE=1; [L16] unsigned int j,k; [L17] int array[SIZE], menor; [L19] menor = __VERIFIER_nondet_int() [L21] j=0 VAL [array={3:0}, j=0, menor=0, SIZE=1] [L21] COND TRUE jmenor) 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, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 597.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 18.6ms, AutomataDifference: 84.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 11 SDslu, 13 SDs, 0 SdLazy, 34 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.1ms SsaConstructionTime, 94.2ms SatisfiabilityAnalysisTime, 148.5ms InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 93 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...