/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/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:05,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:05,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:05,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:05,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:05,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:05,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:05,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:05,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:05,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:05,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:05,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:05,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:05,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:05,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:05,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:05,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:05,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:05,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:05,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:05,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:05,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:05,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:05,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:05,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:05,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:05,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:05,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:05,636 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 18:43:05,662 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:05,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:05,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:05,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:05,665 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:05,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:05,665 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:05,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:05,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:05,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:05,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:05,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:05,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:05,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:05,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:05,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:05,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:05,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:05,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:05,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:05,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:05,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:05,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:05,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:05,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:05,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:05,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:05,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:05,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:05,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:06,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:06,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:06,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:06,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:06,144 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:06,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-10-23 18:43:06,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75665d94a/4e9d689ac9824befb22768f7a79d9555/FLAG99637247e [2020-10-23 18:43:06,915 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:06,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2020-10-23 18:43:06,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75665d94a/4e9d689ac9824befb22768f7a79d9555/FLAG99637247e [2020-10-23 18:43:07,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75665d94a/4e9d689ac9824befb22768f7a79d9555 [2020-10-23 18:43:07,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:07,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:07,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:07,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:07,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:07,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ddbeffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07, skipping insertion in model container [2020-10-23 18:43:07,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:07,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:07,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:07,548 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:07,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:07,584 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:07,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07 WrapperNode [2020-10-23 18:43:07,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:07,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:07,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:07,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:07,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (1/1) ... [2020-10-23 18:43:07,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:07,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:07,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:07,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:07,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (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 18:43:07,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:07,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:07,709 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:07,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:07,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:07,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:07,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:43:07,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:07,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 18:43:07,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:07,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:07,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:07,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:07,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:08,185 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:08,186 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:43:08,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:08 BoogieIcfgContainer [2020-10-23 18:43:08,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:08,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:08,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:08,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:08,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:07" (1/3) ... [2020-10-23 18:43:08,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503fa5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:08, skipping insertion in model container [2020-10-23 18:43:08,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:07" (2/3) ... [2020-10-23 18:43:08,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503fa5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:08, skipping insertion in model container [2020-10-23 18:43:08,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:08" (3/3) ... [2020-10-23 18:43:08,196 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-10-23 18:43:08,208 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:08,213 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:08,258 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:08,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:08,320 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:08,320 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:08,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:08,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:08,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:08,321 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:08,321 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-23 18:43:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:08,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:08,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:08,348 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1161805481, now seen corresponding path program 1 times [2020-10-23 18:43:08,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:08,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949618871] [2020-10-23 18:43:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:08,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:08,741 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 18:43:08,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949618871] [2020-10-23 18:43:08,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:08,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:08,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097552560] [2020-10-23 18:43:08,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:08,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:08,769 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-10-23 18:43:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:09,103 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-10-23 18:43:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:09,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-23 18:43:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:09,115 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:43:09,115 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:43:09,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:43:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-23 18:43:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:43:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:43:09,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-23 18:43:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:09,167 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:43:09,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:43:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:09,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:09,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:09,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:09,169 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1554832491, now seen corresponding path program 1 times [2020-10-23 18:43:09,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:09,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724831385] [2020-10-23 18:43:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:09,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:09,393 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 18:43:09,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724831385] [2020-10-23 18:43:09,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:09,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:09,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817558818] [2020-10-23 18:43:09,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:09,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:09,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:09,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:09,397 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-10-23 18:43:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:09,640 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-23 18:43:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:09,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-23 18:43:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:09,642 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:43:09,642 INFO L226 Difference]: Without dead ends: 24 [2020-10-23 18:43:09,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-23 18:43:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-10-23 18:43:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-23 18:43:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-23 18:43:09,650 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-23 18:43:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:09,650 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-23 18:43:09,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-23 18:43:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:43:09,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:09,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:09,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:09,652 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:09,653 INFO L82 PathProgramCache]: Analyzing trace with hash 36405024, now seen corresponding path program 1 times [2020-10-23 18:43:09,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:09,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370709694] [2020-10-23 18:43:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:09,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:09,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:09,751 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:09,752 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:09,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:43:09,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:09 BoogieIcfgContainer [2020-10-23 18:43:09,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:09,786 INFO L168 Benchmark]: Toolchain (without parser) took 2496.60 ms. Allocated memory was 125.8 MB in the beginning and 155.2 MB in the end (delta: 29.4 MB). Free memory was 101.8 MB in the beginning and 93.2 MB in the end (delta: 8.6 MB). Peak memory consumption was 38.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:09,787 INFO L168 Benchmark]: CDTParser took 1.30 ms. Allocated memory is still 125.8 MB. Free memory is still 86.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:09,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.91 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 91.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:09,789 INFO L168 Benchmark]: Boogie Preprocessor took 35.90 ms. Allocated memory is still 125.8 MB. Free memory was 91.7 MB in the beginning and 90.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:09,790 INFO L168 Benchmark]: RCFGBuilder took 564.96 ms. Allocated memory is still 125.8 MB. Free memory was 90.1 MB in the beginning and 76.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:09,791 INFO L168 Benchmark]: TraceAbstraction took 1594.45 ms. Allocated memory was 125.8 MB in the beginning and 155.2 MB in the end (delta: 29.4 MB). Free memory was 75.8 MB in the beginning and 93.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:09,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.30 ms. Allocated memory is still 125.8 MB. Free memory is still 86.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.91 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 91.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.90 ms. Allocated memory is still 125.8 MB. Free memory was 91.7 MB in the beginning and 90.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 564.96 ms. Allocated memory is still 125.8 MB. Free memory was 90.1 MB in the beginning and 76.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1594.45 ms. Allocated memory was 125.8 MB in the beginning and 155.2 MB in the end (delta: 29.4 MB). Free memory was 75.8 MB in the beginning and 93.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 12.3 MB. 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: [L12] int b; VAL [\old(b)=261, b=0] [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; VAL [b=0, k=1] [L19] COND TRUE \read(k) [L20] n=0 VAL [b=0, k=1, n=0] [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) VAL [b=0, i=0, j=-4294966273, k=1, n=0] [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L30] COND FALSE !(i <= n) VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L35] a[i]=0 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L36] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L8] CALL reach_error() VAL [b=0] [L3] __assert_fail("0", "nec20.c", 3, "reach_error") VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 53 SDslu, 28 SDs, 0 SdLazy, 73 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 2 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 2190 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...