/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:02:05,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:02:05,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:02:05,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 23:02:05,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 23:02:05,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 23:02:05,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 23:02:05,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 23:02:05,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 23:02:05,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 23:02:05,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 23:02:05,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 23:02:05,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:02:05,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:02:05,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:02:05,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:02:05,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:02:05,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:02:05,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:02:05,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:02:05,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:02:05,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:02:05,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:02:05,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:02:05,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 23:02:05,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 23:02:05,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 23:02:05,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 23:02:05,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 23:02:05,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 23:02:05,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 23:02:05,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 23:02:05,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 23:02:05,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 23:02:05,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 23:02:05,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 23:02:05,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 23:02:05,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 23:02:05,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:02:05,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:02:05,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:02:05,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:02:05,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:02:05,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:02:05,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:02:05,201 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:02:05,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:02:05,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:02:05,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:02:05,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:02:05,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:02:05,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:02:05,202 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:02:05,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:02:05,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:02:05,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:02:05,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:02:05,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:02:05,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:02:05,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:02:05,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:02:05,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:02:05,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:02:05,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:02:05,205 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:02:05,205 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:02:05,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:02:05,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:02:05,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:02:05,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:02:05,578 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:02:05,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2021-05-02 23:02:05,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e0ffdbcd/4777d41e4107430da2aa43d13be51353/FLAG89a4022b2 [2021-05-02 23:02:06,101 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:02:06,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2021-05-02 23:02:06,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e0ffdbcd/4777d41e4107430da2aa43d13be51353/FLAG89a4022b2 [2021-05-02 23:02:06,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e0ffdbcd/4777d41e4107430da2aa43d13be51353 [2021-05-02 23:02:06,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:02:06,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:02:06,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:02:06,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:02:06,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:02:06,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d544aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06, skipping insertion in model container [2021-05-02 23:02:06,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:02:06,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:02:06,661 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/nec20.c[356,369] [2021-05-02 23:02:06,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:02:06,682 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:02:06,691 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/nec20.c[356,369] [2021-05-02 23:02:06,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:02:06,708 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:02:06,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06 WrapperNode [2021-05-02 23:02:06,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:02:06,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:02:06,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:02:06,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:02:06,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... [2021-05-02 23:02:06,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:02:06,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:02:06,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:02:06,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:02:06,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:02:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:02:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:02:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:02:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:02:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:02:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:02:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:02:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:02:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:02:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 23:02:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:02:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 23:02:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:02:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:02:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:02:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:02:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:02:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:02:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:02:07,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:02:07,188 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:02:07,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:02:07 BoogieIcfgContainer [2021-05-02 23:02:07,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:02:07,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:02:07,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:02:07,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:02:07,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:02:06" (1/3) ... [2021-05-02 23:02:07,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffc8e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:02:07, skipping insertion in model container [2021-05-02 23:02:07,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:02:06" (2/3) ... [2021-05-02 23:02:07,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffc8e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:02:07, skipping insertion in model container [2021-05-02 23:02:07,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:02:07" (3/3) ... [2021-05-02 23:02:07,196 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2021-05-02 23:02:07,201 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:02:07,204 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:02:07,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:02:07,236 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:02:07,236 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:02:07,236 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:02:07,236 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:02:07,237 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:02:07,237 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:02:07,237 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:02:07,237 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:02:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:02:07,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:07,255 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:07,256 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1512797340, now seen corresponding path program 1 times [2021-05-02 23:02:07,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:07,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651639638] [2021-05-02 23:02:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:07,319 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:07,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:07,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651639638] [2021-05-02 23:02:07,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [651639638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:07,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:07,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:02:07,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583966196] [2021-05-02 23:02:07,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:02:07,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:02:07,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:02:07,603 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:07,918 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-05-02 23:02:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:02:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2021-05-02 23:02:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:07,925 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:02:07,925 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:02:07,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:02:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:02:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-05-02 23:02:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 23:02:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 23:02:07,963 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-05-02 23:02:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:07,963 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 23:02:07,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 23:02:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:02:07,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:07,964 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:07,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:02:07,965 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2102111586, now seen corresponding path program 1 times [2021-05-02 23:02:07,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:07,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535848110] [2021-05-02 23:02:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:07,969 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:08,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:08,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535848110] [2021-05-02 23:02:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [535848110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:08,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:08,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:02:08,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287568712] [2021-05-02 23:02:08,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:02:08,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:08,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:02:08,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:02:08,165 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:08,376 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-05-02 23:02:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:02:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2021-05-02 23:02:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:08,379 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:02:08,379 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:02:08,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:02:08,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:02:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-05-02 23:02:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 23:02:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 23:02:08,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-05-02 23:02:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:08,398 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 23:02:08,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 23:02:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:02:08,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:08,399 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:08,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:02:08,401 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:08,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:08,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1230699476, now seen corresponding path program 1 times [2021-05-02 23:02:08,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:08,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927263831] [2021-05-02 23:02:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:08,443 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= (mod v_main_~i~0_8 4294967296) (mod v_main_~n~0_6 4294967296)) InVars {main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_6} OutVars{main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_6} AuxVars[] AssignedVars[] [2021-05-02 23:02:08,466 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-02 23:02:08,499 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:08,543 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:02:08,578 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-02 23:02:08,610 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:02:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:02:08,642 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:02:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:02:08,685 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:02:08,713 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:02:08,713 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:02:08,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:02:08,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:02:08 BoogieIcfgContainer [2021-05-02 23:02:08,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:02:08,727 INFO L168 Benchmark]: Toolchain (without parser) took 2199.27 ms. Allocated memory is still 194.0 MB. Free memory was 159.2 MB in the beginning and 99.4 MB in the end (delta: 59.8 MB). Peak memory consumption was 58.9 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:08,728 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 194.0 MB. Free memory is still 175.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:02:08,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.63 ms. Allocated memory is still 194.0 MB. Free memory was 159.0 MB in the beginning and 149.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:08,732 INFO L168 Benchmark]: Boogie Preprocessor took 82.14 ms. Allocated memory is still 194.0 MB. Free memory was 149.4 MB in the beginning and 177.3 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:08,732 INFO L168 Benchmark]: RCFGBuilder took 396.55 ms. Allocated memory is still 194.0 MB. Free memory was 177.3 MB in the beginning and 163.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:08,733 INFO L168 Benchmark]: TraceAbstraction took 1535.11 ms. Allocated memory is still 194.0 MB. Free memory was 162.7 MB in the beginning and 99.4 MB in the end (delta: 63.3 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:08,736 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 194.0 MB. Free memory is still 175.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 178.63 ms. Allocated memory is still 194.0 MB. Free memory was 159.0 MB in the beginning and 149.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 82.14 ms. Allocated memory is still 194.0 MB. Free memory was 149.4 MB in the beginning and 177.3 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 396.55 ms. Allocated memory is still 194.0 MB. Free memory was 177.3 MB in the beginning and 163.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1535.11 ms. Allocated memory is still 194.0 MB. Free memory was 162.7 MB in the beginning and 99.4 MB in the end (delta: 63.3 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int b; [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; [L19] COND TRUE \read(k) [L20] n=0 [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 [L30] COND FALSE !(i <= n) [L35] a[i]=0 [L36] CALL __VERIFIER_assert(j<1025) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1480.0ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 10.1ms, AutomataDifference: 552.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 45 SDtfs, 53 SDslu, 25 SDs, 0 SdLazy, 73 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 150.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 389.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 39.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...