/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:48:02,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:48:02,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:48:02,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:48:02,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:48:02,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:48:02,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:48:02,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:48:02,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:48:02,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:48:02,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:48:02,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:48:02,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:48:02,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:48:02,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:48:02,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:48:02,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:48:02,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:48:02,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:48:02,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:48:02,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:48:02,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:48:02,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:48:02,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:48:02,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:48:02,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:48:02,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:48:02,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:48:02,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:48:02,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:48:02,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:48:02,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:48:02,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:48:02,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:48:02,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:48:02,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:48:02,772 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:48:02,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:48:02,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:48:02,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:48:02,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:48:02,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:48:02,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:48:02,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:48:03,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:48:03,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:48:03,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:48:03,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:48:03,328 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:48:03,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2021-02-23 18:48:03,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed0138d0/38dfc81d2a1e498a927e80c1a8114baf/FLAGcc1e20d52 [2021-02-23 18:48:04,106 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:48:04,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2021-02-23 18:48:04,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed0138d0/38dfc81d2a1e498a927e80c1a8114baf/FLAGcc1e20d52 [2021-02-23 18:48:04,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed0138d0/38dfc81d2a1e498a927e80c1a8114baf [2021-02-23 18:48:04,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:48:04,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:48:04,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:04,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:48:04,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:48:04,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4fd789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04, skipping insertion in model container [2021-02-23 18:48:04,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:48:04,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:48:04,735 WARN L226 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] [2021-02-23 18:48:04,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:04,782 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:48:04,799 WARN L226 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] [2021-02-23 18:48:04,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:04,848 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:48:04,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04 WrapperNode [2021-02-23 18:48:04,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:04,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:48:04,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:48:04,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:48:04,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (1/1) ... [2021-02-23 18:48:04,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:48:04,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:48:04,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:48:04,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:48:04,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (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 [2021-02-23 18:48:04,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:48:04,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:48:04,996 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:48:04,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:48:04,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:48:04,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:48:04,997 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:48:04,997 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:48:04,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:48:04,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 18:48:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:48:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 18:48:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:48:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:48:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:48:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:48:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:48:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:48:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:48:05,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:48:05,362 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:48:05,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:05 BoogieIcfgContainer [2021-02-23 18:48:05,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:48:05,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:48:05,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:48:05,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:48:05,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:48:04" (1/3) ... [2021-02-23 18:48:05,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6174ca31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:05, skipping insertion in model container [2021-02-23 18:48:05,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:04" (2/3) ... [2021-02-23 18:48:05,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6174ca31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:05, skipping insertion in model container [2021-02-23 18:48:05,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:05" (3/3) ... [2021-02-23 18:48:05,387 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2021-02-23 18:48:05,401 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:48:05,410 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:48:05,435 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:48:05,478 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:48:05,478 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:48:05,478 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:48:05,479 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:48:05,479 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:48:05,479 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:48:05,479 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:48:05,479 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:48:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-23 18:48:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:48:05,522 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:05,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:05,524 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2129882840, now seen corresponding path program 1 times [2021-02-23 18:48:05,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:05,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832026349] [2021-02-23 18:48:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:05,718 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:05,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:05,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,074 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-23 18:48:06,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:06,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:06,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832026349] [2021-02-23 18:48:06,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:06,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:48:06,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67979041] [2021-02-23 18:48:06,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:48:06,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:48:06,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:48:06,163 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2021-02-23 18:48:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:06,296 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-02-23 18:48:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:48:06,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-02-23 18:48:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:06,307 INFO L225 Difference]: With dead ends: 69 [2021-02-23 18:48:06,307 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 18:48:06,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:48:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 18:48:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-23 18:48:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-23 18:48:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-23 18:48:06,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2021-02-23 18:48:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:06,366 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-23 18:48:06,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:48:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-23 18:48:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:48:06,367 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:06,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:06,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:48:06,368 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1900849632, now seen corresponding path program 1 times [2021-02-23 18:48:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:06,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13630243] [2021-02-23 18:48:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:06,378 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:06,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:06,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:06,510 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 18:48:06,510 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 18:48:06,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:06,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:06,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13630243] [2021-02-23 18:48:06,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:06,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:48:06,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044035410] [2021-02-23 18:48:06,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:48:06,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:48:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:48:06,572 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 5 states. [2021-02-23 18:48:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:06,747 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-02-23 18:48:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:48:06,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-02-23 18:48:06,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:06,751 INFO L225 Difference]: With dead ends: 57 [2021-02-23 18:48:06,752 INFO L226 Difference]: Without dead ends: 51 [2021-02-23 18:48:06,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:48:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-23 18:48:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-02-23 18:48:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-23 18:48:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-23 18:48:06,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 31 [2021-02-23 18:48:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:06,772 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-23 18:48:06,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:48:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-23 18:48:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:48:06,774 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:06,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:06,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:48:06,775 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:06,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1192211008, now seen corresponding path program 1 times [2021-02-23 18:48:06,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:06,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105437200] [2021-02-23 18:48:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:06,780 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:06,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:06,899 WARN L141 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size [2021-02-23 18:48:06,902 WARN L147 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size 48 [2021-02-23 18:48:06,951 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size [2021-02-23 18:48:06,956 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size 38 [2021-02-23 18:48:06,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:07,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:07,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:07,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105437200] [2021-02-23 18:48:07,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:07,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:48:07,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138016680] [2021-02-23 18:48:07,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:48:07,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:07,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:48:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:48:07,060 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 5 states. [2021-02-23 18:48:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:07,300 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-02-23 18:48:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:48:07,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-02-23 18:48:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:07,302 INFO L225 Difference]: With dead ends: 58 [2021-02-23 18:48:07,302 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 18:48:07,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:48:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 18:48:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-02-23 18:48:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 18:48:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-23 18:48:07,316 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2021-02-23 18:48:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:07,317 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-23 18:48:07,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:48:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-23 18:48:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:48:07,318 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:07,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:07,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:48:07,319 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:07,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2094669374, now seen corresponding path program 1 times [2021-02-23 18:48:07,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:07,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854810319] [2021-02-23 18:48:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:07,782 WARN L202 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-02-23 18:48:07,797 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:07,799 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:07,832 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:07,862 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:07,896 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:48:07,897 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:48:07,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:48:07,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:48:07 BoogieIcfgContainer [2021-02-23 18:48:07,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:48:07,919 INFO L168 Benchmark]: Toolchain (without parser) took 3469.91 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 131.9 MB in the beginning and 156.8 MB in the end (delta: -24.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:07,919 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 155.2 MB. Free memory is still 139.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:48:07,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.86 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 121.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:07,921 INFO L168 Benchmark]: Boogie Preprocessor took 37.36 ms. Allocated memory is still 155.2 MB. Free memory was 121.2 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:07,922 INFO L168 Benchmark]: RCFGBuilder took 475.70 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 103.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:07,923 INFO L168 Benchmark]: TraceAbstraction took 2549.11 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 103.3 MB in the beginning and 156.8 MB in the end (delta: -53.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:48:07,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 155.2 MB. Free memory is still 139.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 383.86 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 121.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.36 ms. Allocated memory is still 155.2 MB. Free memory was 121.2 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 475.70 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 103.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2549.11 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 103.3 MB in the beginning and 156.8 MB in the end (delta: -53.5 MB). There was no memory consumed. 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, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 125 SDslu, 55 SDs, 0 SdLazy, 122 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 3 MinimizatonAttempts, 23 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...