/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/multivar_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:36,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:36,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:36,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:36,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:36,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:36,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:36,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:36,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:36,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:36,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:36,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:36,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:36,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:36,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:36,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:36,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:36,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:36,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:36,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:36,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:21:36,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:36,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:36,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:36,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:36,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:36,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:36,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:36,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:36,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:36,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:36,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:36,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:36,600 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:36,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:36,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:36,601 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:36,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:36,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:36,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:36,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:36,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:36,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:36,602 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:36,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:36,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:36,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:36,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:36,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:36,997 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:36,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/multivar_1-2.c [2021-02-22 02:21:37,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7052e57c/c20dc55e2e2f4951896ddd5fc0e34eaa/FLAG21efd1601 [2021-02-22 02:21:37,683 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:37,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-2.c [2021-02-22 02:21:37,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7052e57c/c20dc55e2e2f4951896ddd5fc0e34eaa/FLAG21efd1601 [2021-02-22 02:21:38,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7052e57c/c20dc55e2e2f4951896ddd5fc0e34eaa [2021-02-22 02:21:38,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:38,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:38,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:38,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:38,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:38,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffb6540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38, skipping insertion in model container [2021-02-22 02:21:38,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:38,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:38,256 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-2.c[374,387] [2021-02-22 02:21:38,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:38,282 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:38,301 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-2.c[374,387] [2021-02-22 02:21:38,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:38,325 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:38,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38 WrapperNode [2021-02-22 02:21:38,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:38,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:38,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:38,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:38,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (1/1) ... [2021-02-22 02:21:38,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:38,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:38,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:38,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:38,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (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 [2021-02-22 02:21:38,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:38,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:38,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:38,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:21:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:38,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:38,961 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:38,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:38 BoogieIcfgContainer [2021-02-22 02:21:38,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:38,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:38,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:38,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:38,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:38" (1/3) ... [2021-02-22 02:21:38,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c06a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:38, skipping insertion in model container [2021-02-22 02:21:38,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:38" (2/3) ... [2021-02-22 02:21:38,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c06a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:38, skipping insertion in model container [2021-02-22 02:21:38,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:38" (3/3) ... [2021-02-22 02:21:38,974 INFO L111 eAbstractionObserver]: Analyzing ICFG multivar_1-2.c [2021-02-22 02:21:38,982 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:38,987 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:39,010 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:39,034 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:39,034 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:39,034 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:39,035 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:39,035 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:39,035 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:39,035 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:39,035 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-02-22 02:21:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-22 02:21:39,134 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:39,135 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] [2021-02-22 02:21:39,135 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash -483578508, now seen corresponding path program 1 times [2021-02-22 02:21:39,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:39,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145910354] [2021-02-22 02:21:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:39,233 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:39,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:39,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:39,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:39,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:39,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145910354] [2021-02-22 02:21:39,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:39,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:21:39,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459953549] [2021-02-22 02:21:39,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:21:39,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:21:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:39,475 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2021-02-22 02:21:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:39,582 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-02-22 02:21:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:21:39,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-22 02:21:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:39,594 INFO L225 Difference]: With dead ends: 45 [2021-02-22 02:21:39,594 INFO L226 Difference]: Without dead ends: 27 [2021-02-22 02:21:39,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-22 02:21:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-22 02:21:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-22 02:21:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-02-22 02:21:39,646 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2021-02-22 02:21:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:39,647 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-02-22 02:21:39,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:21:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-02-22 02:21:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-22 02:21:39,648 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:39,649 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] [2021-02-22 02:21:39,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:39,649 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash -492813718, now seen corresponding path program 1 times [2021-02-22 02:21:39,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:39,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17977937] [2021-02-22 02:21:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:39,654 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:39,695 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:39,739 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:39,781 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:21:39,781 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:21:39,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:39,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:39 BoogieIcfgContainer [2021-02-22 02:21:39,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:39,803 INFO L168 Benchmark]: Toolchain (without parser) took 1727.72 ms. Allocated memory is still 162.5 MB. Free memory was 139.3 MB in the beginning and 115.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,805 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 162.5 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:39,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.64 ms. Allocated memory is still 162.5 MB. Free memory was 138.2 MB in the beginning and 128.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,810 INFO L168 Benchmark]: Boogie Preprocessor took 56.85 ms. Allocated memory is still 162.5 MB. Free memory was 128.5 MB in the beginning and 127.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,812 INFO L168 Benchmark]: RCFGBuilder took 575.35 ms. Allocated memory is still 162.5 MB. Free memory was 127.0 MB in the beginning and 113.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,814 INFO L168 Benchmark]: TraceAbstraction took 833.42 ms. Allocated memory is still 162.5 MB. Free memory was 112.9 MB in the beginning and 115.1 MB in the end (delta: -2.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:39,825 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 162.5 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 238.64 ms. Allocated memory is still 162.5 MB. Free memory was 138.2 MB in the beginning and 128.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.85 ms. Allocated memory is still 162.5 MB. Free memory was 128.5 MB in the beginning and 127.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 575.35 ms. Allocated memory is still 162.5 MB. Free memory was 127.0 MB in the beginning and 113.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 833.42 ms. Allocated memory is still 162.5 MB. Free memory was 112.9 MB in the beginning and 115.1 MB in the end (delta: -2.1 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: [L14] unsigned int x = __VERIFIER_nondet_uint(); [L15] unsigned int y = x + 1; [L17] COND FALSE !(x < 1024) [L22] CALL __VERIFIER_assert(x == y) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 17 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 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...