/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -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 0.2.0-b8ad66e [2020-10-23 18:43:03,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:03,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:03,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:03,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:03,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:03,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:03,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:03,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:03,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:03,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:03,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:03,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:03,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:03,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:03,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:03,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:03,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:03,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:03,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:03,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:03,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:03,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:03,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:03,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:03,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:03,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:03,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:03,648 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 [2020-10-23 18:43:03,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:03,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:03,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:03,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:03,702 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:03,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:03,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:03,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:03,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:03,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:03,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:03,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:03,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:03,704 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:03,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:03,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:03,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:03,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:03,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:03,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:03,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:03,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:03,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:03,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:03,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:03,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:03,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:03,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:03,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:03,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:04,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:04,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:04,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:04,141 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:04,142 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:04,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec11.c [2020-10-23 18:43:04,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1381996/f1bff5c56ecc43be9feeab751773a85e/FLAG3dac472fe [2020-10-23 18:43:04,920 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:04,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec11.c [2020-10-23 18:43:04,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1381996/f1bff5c56ecc43be9feeab751773a85e/FLAG3dac472fe [2020-10-23 18:43:05,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1381996/f1bff5c56ecc43be9feeab751773a85e [2020-10-23 18:43:05,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:05,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:05,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:05,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:05,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:05,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508f21ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05, skipping insertion in model container [2020-10-23 18:43:05,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:05,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:05,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:05,502 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:05,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:05,532 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:05,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05 WrapperNode [2020-10-23 18:43:05,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:05,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:05,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:05,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:05,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... [2020-10-23 18:43:05,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:05,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:05,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:05,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:05,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 18:43:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:05,881 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:05,881 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:43:05,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:05 BoogieIcfgContainer [2020-10-23 18:43:05,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:05,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:05,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:05,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:05,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:05" (1/3) ... [2020-10-23 18:43:05,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808d4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:05, skipping insertion in model container [2020-10-23 18:43:05,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:05" (2/3) ... [2020-10-23 18:43:05,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808d4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:05, skipping insertion in model container [2020-10-23 18:43:05,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:05" (3/3) ... [2020-10-23 18:43:05,893 INFO L111 eAbstractionObserver]: Analyzing ICFG nec11.c [2020-10-23 18:43:05,906 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:05,911 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:05,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:05,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:05,956 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:05,956 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:05,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:05,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:05,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:05,957 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:05,957 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:43:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:43:06,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:06,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:06,008 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1553397026, now seen corresponding path program 1 times [2020-10-23 18:43:06,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:06,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521846752] [2020-10-23 18:43:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:06,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:06,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521846752] [2020-10-23 18:43:06,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:06,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:43:06,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666832327] [2020-10-23 18:43:06,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:43:06,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:06,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:43:06,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:06,386 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-23 18:43:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:06,484 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-23 18:43:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:43:06,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:43:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:06,495 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:43:06,495 INFO L226 Difference]: Without dead ends: 15 [2020-10-23 18:43:06,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-23 18:43:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-23 18:43:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-23 18:43:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-23 18:43:06,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-23 18:43:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:06,546 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-23 18:43:06,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:43:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-23 18:43:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:43:06,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:06,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:06,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:06,548 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1868317687, now seen corresponding path program 1 times [2020-10-23 18:43:06,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:06,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306051433] [2020-10-23 18:43:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:06,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:06,611 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:06,639 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:06,639 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:06,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:06,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:06 BoogieIcfgContainer [2020-10-23 18:43:06,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:06,676 INFO L168 Benchmark]: Toolchain (without parser) took 1382.12 ms. Allocated memory is still 159.4 MB. Free memory was 134.9 MB in the beginning and 117.2 MB in the end (delta: 17.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:06,677 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:06,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.35 ms. Allocated memory is still 159.4 MB. Free memory was 134.4 MB in the beginning and 125.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:06,679 INFO L168 Benchmark]: Boogie Preprocessor took 34.34 ms. Allocated memory is still 159.4 MB. Free memory was 125.1 MB in the beginning and 123.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:06,681 INFO L168 Benchmark]: RCFGBuilder took 314.60 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 111.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:06,681 INFO L168 Benchmark]: TraceAbstraction took 787.94 ms. Allocated memory is still 159.4 MB. Free memory was 110.8 MB in the beginning and 117.2 MB in the end (delta: -6.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:06,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.35 ms. Allocated memory is still 159.4 MB. Free memory was 134.4 MB in the beginning and 125.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.34 ms. Allocated memory is still 159.4 MB. Free memory was 125.1 MB in the beginning and 123.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 314.60 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 111.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 787.94 ms. Allocated memory is still 159.4 MB. Free memory was 110.8 MB in the beginning and 117.2 MB in the end (delta: -6.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L3] __assert_fail("0", "nec11.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 13 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 451 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...